./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label59.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label59.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 51dcd89c10622c543bf9ef783ec22401c3170140113dd2b2907b165950bd75af --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 12:51:22,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 12:51:22,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 12:51:22,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 12:51:22,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 12:51:22,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 12:51:22,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 12:51:22,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 12:51:22,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 12:51:22,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 12:51:22,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 12:51:22,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 12:51:22,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 12:51:22,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 12:51:22,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 12:51:22,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 12:51:22,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 12:51:22,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 12:51:22,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 12:51:22,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 12:51:22,380 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 12:51:22,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 12:51:22,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 12:51:22,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 12:51:22,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 12:51:22,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 12:51:22,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 12:51:22,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 12:51:22,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 12:51:22,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 12:51:22,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 12:51:22,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 12:51:22,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 12:51:22,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 12:51:22,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 12:51:22,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 12:51:22,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 12:51:22,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 12:51:22,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 12:51:22,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 12:51:22,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 12:51:22,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 12:51:22,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 12:51:22,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 12:51:22,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 12:51:22,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 12:51:22,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 12:51:22,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 12:51:22,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 12:51:22,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 12:51:22,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 12:51:22,416 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 12:51:22,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 12:51:22,417 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 12:51:22,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 12:51:22,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 12:51:22,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 12:51:22,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 12:51:22,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 12:51:22,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 12:51:22,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:51:22,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 12:51:22,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 12:51:22,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 12:51:22,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 12:51:22,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 12:51:22,419 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 12:51:22,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 12:51:22,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 12:51:22,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51dcd89c10622c543bf9ef783ec22401c3170140113dd2b2907b165950bd75af [2022-07-13 12:51:22,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 12:51:22,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 12:51:22,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 12:51:22,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 12:51:22,632 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 12:51:22,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label59.c [2022-07-13 12:51:22,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1917f98b1/a31de6a7038d47e6b907868fb4f2f4d0/FLAG9ac734fb4 [2022-07-13 12:51:23,243 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 12:51:23,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label59.c [2022-07-13 12:51:23,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1917f98b1/a31de6a7038d47e6b907868fb4f2f4d0/FLAG9ac734fb4 [2022-07-13 12:51:23,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1917f98b1/a31de6a7038d47e6b907868fb4f2f4d0 [2022-07-13 12:51:23,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 12:51:23,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 12:51:23,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 12:51:23,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 12:51:23,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 12:51:23,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:51:23" (1/1) ... [2022-07-13 12:51:23,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ef4b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:23, skipping insertion in model container [2022-07-13 12:51:23,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:51:23" (1/1) ... [2022-07-13 12:51:23,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 12:51:23,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 12:51:23,777 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label59.c[5577,5590] [2022-07-13 12:51:24,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:51:24,310 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 12:51:24,335 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label59.c[5577,5590] [2022-07-13 12:51:24,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:51:24,630 INFO L208 MainTranslator]: Completed translation [2022-07-13 12:51:24,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24 WrapperNode [2022-07-13 12:51:24,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 12:51:24,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 12:51:24,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 12:51:24,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 12:51:24,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:24,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:24,879 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-13 12:51:24,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 12:51:24,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 12:51:24,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 12:51:24,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 12:51:24,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:24,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:24,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:24,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:25,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:25,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:25,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:25,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 12:51:25,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 12:51:25,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 12:51:25,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 12:51:25,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (1/1) ... [2022-07-13 12:51:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:51:25,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:51:25,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 12:51:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 12:51:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 12:51:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 12:51:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 12:51:25,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 12:51:25,383 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 12:51:25,384 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 12:51:28,127 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 12:51:28,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 12:51:28,142 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 12:51:28,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:51:28 BoogieIcfgContainer [2022-07-13 12:51:28,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 12:51:28,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 12:51:28,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 12:51:28,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 12:51:28,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 12:51:23" (1/3) ... [2022-07-13 12:51:28,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151b1d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:51:28, skipping insertion in model container [2022-07-13 12:51:28,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:51:24" (2/3) ... [2022-07-13 12:51:28,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151b1d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:51:28, skipping insertion in model container [2022-07-13 12:51:28,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:51:28" (3/3) ... [2022-07-13 12:51:28,151 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label59.c [2022-07-13 12:51:28,163 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 12:51:28,163 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 12:51:28,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 12:51:28,225 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@145e8ded, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@134445df [2022-07-13 12:51:28,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 12:51:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 12:51:28,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:28,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:28,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2022-07-13 12:51:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:28,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078015556] [2022-07-13 12:51:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:28,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:51:28,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078015556] [2022-07-13 12:51:28,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078015556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:28,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:28,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:51:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510281692] [2022-07-13 12:51:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:28,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:51:28,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:51:28,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:28,466 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:31,292 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-07-13 12:51:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:51:31,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-13 12:51:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:31,311 INFO L225 Difference]: With dead ends: 2388 [2022-07-13 12:51:31,314 INFO L226 Difference]: Without dead ends: 1506 [2022-07-13 12:51:31,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:31,323 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 792 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:31,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 112 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 12:51:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-13 12:51:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-13 12:51:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.86578073089701) internal successors, (2808), 1505 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2808 transitions. [2022-07-13 12:51:31,406 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2808 transitions. Word has length 44 [2022-07-13 12:51:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:31,406 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2808 transitions. [2022-07-13 12:51:31,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2808 transitions. [2022-07-13 12:51:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 12:51:31,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:31,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:31,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 12:51:31,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash 606861728, now seen corresponding path program 1 times [2022-07-13 12:51:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:31,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338950141] [2022-07-13 12:51:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:51:31,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338950141] [2022-07-13 12:51:31,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338950141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:31,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:31,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:51:31,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661090320] [2022-07-13 12:51:31,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:51:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:51:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:51:31,567 INFO L87 Difference]: Start difference. First operand 1506 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:35,622 INFO L93 Difference]: Finished difference Result 5271 states and 9796 transitions. [2022-07-13 12:51:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 12:51:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2022-07-13 12:51:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:35,633 INFO L225 Difference]: With dead ends: 5271 [2022-07-13 12:51:35,634 INFO L226 Difference]: Without dead ends: 3767 [2022-07-13 12:51:35,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:51:35,636 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 2307 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2307 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 5146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:35,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2307 Valid, 197 Invalid, 5146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-13 12:51:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2022-07-13 12:51:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2022-07-13 12:51:35,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.6056412985630655) internal successors, (6034), 3758 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6034 transitions. [2022-07-13 12:51:35,706 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6034 transitions. Word has length 109 [2022-07-13 12:51:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:35,707 INFO L495 AbstractCegarLoop]: Abstraction has 3759 states and 6034 transitions. [2022-07-13 12:51:35,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6034 transitions. [2022-07-13 12:51:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-13 12:51:35,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:35,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:35,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 12:51:35,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1014367121, now seen corresponding path program 1 times [2022-07-13 12:51:35,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:35,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237084191] [2022-07-13 12:51:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:35,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:51:35,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:35,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237084191] [2022-07-13 12:51:35,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237084191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:35,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:35,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:51:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818350965] [2022-07-13 12:51:35,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:35,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:51:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:51:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:51:35,859 INFO L87 Difference]: Start difference. First operand 3759 states and 6034 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:39,091 INFO L93 Difference]: Finished difference Result 10559 states and 17378 transitions. [2022-07-13 12:51:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:51:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2022-07-13 12:51:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:39,110 INFO L225 Difference]: With dead ends: 10559 [2022-07-13 12:51:39,110 INFO L226 Difference]: Without dead ends: 6765 [2022-07-13 12:51:39,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:51:39,114 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 692 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:39,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 714 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-13 12:51:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2022-07-13 12:51:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 6763. [2022-07-13 12:51:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.357438627624963) internal successors, (9179), 6762 states have internal predecessors, (9179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9179 transitions. [2022-07-13 12:51:39,200 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9179 transitions. Word has length 115 [2022-07-13 12:51:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:39,200 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 9179 transitions. [2022-07-13 12:51:39,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9179 transitions. [2022-07-13 12:51:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-13 12:51:39,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:39,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:39,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 12:51:39,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1293105368, now seen corresponding path program 1 times [2022-07-13 12:51:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298064926] [2022-07-13 12:51:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:51:39,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:39,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298064926] [2022-07-13 12:51:39,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298064926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:39,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:39,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:51:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557479710] [2022-07-13 12:51:39,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:39,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:51:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:51:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:39,314 INFO L87 Difference]: Start difference. First operand 6763 states and 9179 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:41,797 INFO L93 Difference]: Finished difference Result 16528 states and 23482 transitions. [2022-07-13 12:51:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:51:41,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 189 [2022-07-13 12:51:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:41,822 INFO L225 Difference]: With dead ends: 16528 [2022-07-13 12:51:41,822 INFO L226 Difference]: Without dead ends: 9767 [2022-07-13 12:51:41,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:41,835 INFO L413 NwaCegarLoop]: 1350 mSDtfsCounter, 734 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:41,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1358 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 12:51:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-07-13 12:51:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-07-13 12:51:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3271554372312102) internal successors, (12961), 9766 states have internal predecessors, (12961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12961 transitions. [2022-07-13 12:51:41,967 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12961 transitions. Word has length 189 [2022-07-13 12:51:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:41,968 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12961 transitions. [2022-07-13 12:51:41,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12961 transitions. [2022-07-13 12:51:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-13 12:51:41,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:41,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:41,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 12:51:41,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 374813785, now seen corresponding path program 1 times [2022-07-13 12:51:41,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:41,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443152541] [2022-07-13 12:51:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:41,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 12:51:42,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:42,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443152541] [2022-07-13 12:51:42,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443152541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:42,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:42,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:51:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655197119] [2022-07-13 12:51:42,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:42,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:51:42,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:51:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:42,107 INFO L87 Difference]: Start difference. First operand 9767 states and 12961 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:44,475 INFO L93 Difference]: Finished difference Result 25542 states and 34829 transitions. [2022-07-13 12:51:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:51:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 251 [2022-07-13 12:51:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:44,508 INFO L225 Difference]: With dead ends: 25542 [2022-07-13 12:51:44,509 INFO L226 Difference]: Without dead ends: 15777 [2022-07-13 12:51:44,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:44,515 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:44,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 388 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:51:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2022-07-13 12:51:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15775. [2022-07-13 12:51:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.301572207429948) internal successors, (20531), 15774 states have internal predecessors, (20531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 20531 transitions. [2022-07-13 12:51:44,710 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 20531 transitions. Word has length 251 [2022-07-13 12:51:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:44,710 INFO L495 AbstractCegarLoop]: Abstraction has 15775 states and 20531 transitions. [2022-07-13 12:51:44,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 20531 transitions. [2022-07-13 12:51:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-07-13 12:51:44,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:44,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 12:51:44,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -97634127, now seen corresponding path program 1 times [2022-07-13 12:51:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847048801] [2022-07-13 12:51:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 12:51:44,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847048801] [2022-07-13 12:51:44,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847048801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:44,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:44,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:51:44,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357514112] [2022-07-13 12:51:44,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:51:44,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:51:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:51:44,822 INFO L87 Difference]: Start difference. First operand 15775 states and 20531 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:47,586 INFO L93 Difference]: Finished difference Result 31587 states and 41098 transitions. [2022-07-13 12:51:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:51:47,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 256 [2022-07-13 12:51:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:47,611 INFO L225 Difference]: With dead ends: 31587 [2022-07-13 12:51:47,611 INFO L226 Difference]: Without dead ends: 15777 [2022-07-13 12:51:47,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:51:47,624 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3813 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:47,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 402 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3813 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 12:51:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2022-07-13 12:51:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15775. [2022-07-13 12:51:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2801445416508177) internal successors, (20193), 15774 states have internal predecessors, (20193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 20193 transitions. [2022-07-13 12:51:47,798 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 20193 transitions. Word has length 256 [2022-07-13 12:51:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:47,798 INFO L495 AbstractCegarLoop]: Abstraction has 15775 states and 20193 transitions. [2022-07-13 12:51:47,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:47,799 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 20193 transitions. [2022-07-13 12:51:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-07-13 12:51:47,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:47,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 12:51:47,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -469041642, now seen corresponding path program 1 times [2022-07-13 12:51:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:47,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967033657] [2022-07-13 12:51:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 12:51:47,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:47,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967033657] [2022-07-13 12:51:47,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967033657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:47,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:47,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:51:47,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609961486] [2022-07-13 12:51:47,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:47,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:51:47,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:51:47,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:47,894 INFO L87 Difference]: Start difference. First operand 15775 states and 20193 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:50,232 INFO L93 Difference]: Finished difference Result 44315 states and 57309 transitions. [2022-07-13 12:51:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:51:50,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 265 [2022-07-13 12:51:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:50,275 INFO L225 Difference]: With dead ends: 44315 [2022-07-13 12:51:50,276 INFO L226 Difference]: Without dead ends: 28542 [2022-07-13 12:51:50,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:50,287 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 652 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:50,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 524 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:51:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28542 states. [2022-07-13 12:51:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28542 to 23285. [2022-07-13 12:51:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.2308022676516062) internal successors, (28658), 23284 states have internal predecessors, (28658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 28658 transitions. [2022-07-13 12:51:50,548 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 28658 transitions. Word has length 265 [2022-07-13 12:51:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:50,548 INFO L495 AbstractCegarLoop]: Abstraction has 23285 states and 28658 transitions. [2022-07-13 12:51:50,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 28658 transitions. [2022-07-13 12:51:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-07-13 12:51:50,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:50,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:50,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 12:51:50,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944431, now seen corresponding path program 1 times [2022-07-13 12:51:50,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:50,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611253368] [2022-07-13 12:51:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 12:51:50,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:50,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611253368] [2022-07-13 12:51:50,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611253368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:50,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:50,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:51:50,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787842899] [2022-07-13 12:51:50,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:50,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:51:50,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:50,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:51:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:50,648 INFO L87 Difference]: Start difference. First operand 23285 states and 28658 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:53,008 INFO L93 Difference]: Finished difference Result 58584 states and 71943 transitions. [2022-07-13 12:51:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:51:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 344 [2022-07-13 12:51:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:53,051 INFO L225 Difference]: With dead ends: 58584 [2022-07-13 12:51:53,052 INFO L226 Difference]: Without dead ends: 35301 [2022-07-13 12:51:53,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:53,067 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 696 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:53,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 272 Invalid, 2829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:51:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35301 states. [2022-07-13 12:51:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35301 to 33799. [2022-07-13 12:51:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33799 states, 33798 states have (on average 1.2203384815669567) internal successors, (41245), 33798 states have internal predecessors, (41245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33799 states to 33799 states and 41245 transitions. [2022-07-13 12:51:53,369 INFO L78 Accepts]: Start accepts. Automaton has 33799 states and 41245 transitions. Word has length 344 [2022-07-13 12:51:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:53,369 INFO L495 AbstractCegarLoop]: Abstraction has 33799 states and 41245 transitions. [2022-07-13 12:51:53,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33799 states and 41245 transitions. [2022-07-13 12:51:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-13 12:51:53,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:53,374 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:53,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 12:51:53,374 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash 485264543, now seen corresponding path program 1 times [2022-07-13 12:51:53,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:53,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335988218] [2022-07-13 12:51:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:53,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 12:51:53,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:53,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335988218] [2022-07-13 12:51:53,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335988218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:53,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:51:53,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:51:53,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980919775] [2022-07-13 12:51:53,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:53,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:51:53,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:53,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:51:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:53,479 INFO L87 Difference]: Start difference. First operand 33799 states and 41245 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:55,966 INFO L93 Difference]: Finished difference Result 87873 states and 108666 transitions. [2022-07-13 12:51:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:51:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 357 [2022-07-13 12:51:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:56,038 INFO L225 Difference]: With dead ends: 87873 [2022-07-13 12:51:56,038 INFO L226 Difference]: Without dead ends: 54076 [2022-07-13 12:51:56,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:51:56,067 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:56,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:51:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54076 states. [2022-07-13 12:51:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54076 to 51072. [2022-07-13 12:51:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51072 states, 51071 states have (on average 1.229484443226097) internal successors, (62791), 51071 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51072 states to 51072 states and 62791 transitions. [2022-07-13 12:51:56,666 INFO L78 Accepts]: Start accepts. Automaton has 51072 states and 62791 transitions. Word has length 357 [2022-07-13 12:51:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:51:56,666 INFO L495 AbstractCegarLoop]: Abstraction has 51072 states and 62791 transitions. [2022-07-13 12:51:56,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 51072 states and 62791 transitions. [2022-07-13 12:51:56,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-07-13 12:51:56,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:51:56,671 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:51:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 12:51:56,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:51:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:51:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash -636646891, now seen corresponding path program 1 times [2022-07-13 12:51:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:51:56,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336713015] [2022-07-13 12:51:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:51:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 125 proven. 108 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 12:51:56,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:51:56,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336713015] [2022-07-13 12:51:56,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336713015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:51:56,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568170034] [2022-07-13 12:51:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:51:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:51:56,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:51:56,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:51:56,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 12:51:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:51:56,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:51:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:51:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 12:51:57,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:51:57,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568170034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:51:57,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:51:57,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 12:51:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698049684] [2022-07-13 12:51:57,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:51:57,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:51:57,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:51:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:51:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:51:57,045 INFO L87 Difference]: Start difference. First operand 51072 states and 62791 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:51:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:51:59,617 INFO L93 Difference]: Finished difference Result 117913 states and 145409 transitions. [2022-07-13 12:51:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:51:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 361 [2022-07-13 12:51:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:51:59,698 INFO L225 Difference]: With dead ends: 117913 [2022-07-13 12:51:59,699 INFO L226 Difference]: Without dead ends: 66843 [2022-07-13 12:51:59,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:51:59,729 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 760 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:51:59,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 246 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:51:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66843 states. [2022-07-13 12:52:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66843 to 66843. [2022-07-13 12:52:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66843 states, 66842 states have (on average 1.2162562460728286) internal successors, (81297), 66842 states have internal predecessors, (81297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66843 states to 66843 states and 81297 transitions. [2022-07-13 12:52:00,496 INFO L78 Accepts]: Start accepts. Automaton has 66843 states and 81297 transitions. Word has length 361 [2022-07-13 12:52:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:00,497 INFO L495 AbstractCegarLoop]: Abstraction has 66843 states and 81297 transitions. [2022-07-13 12:52:00,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 66843 states and 81297 transitions. [2022-07-13 12:52:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-07-13 12:52:00,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:00,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:00,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 12:52:00,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 12:52:00,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash 93657291, now seen corresponding path program 1 times [2022-07-13 12:52:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:00,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140905327] [2022-07-13 12:52:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:00,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-13 12:52:00,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140905327] [2022-07-13 12:52:00,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140905327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:00,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:00,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:00,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151064371] [2022-07-13 12:52:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:00,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:00,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:00,819 INFO L87 Difference]: Start difference. First operand 66843 states and 81297 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:03,487 INFO L93 Difference]: Finished difference Result 162222 states and 196832 transitions. [2022-07-13 12:52:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 372 [2022-07-13 12:52:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:03,693 INFO L225 Difference]: With dead ends: 162222 [2022-07-13 12:52:03,693 INFO L226 Difference]: Without dead ends: 95381 [2022-07-13 12:52:03,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:03,717 INFO L413 NwaCegarLoop]: 1316 mSDtfsCounter, 747 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:03,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1324 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 12:52:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95381 states. [2022-07-13 12:52:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95381 to 93128. [2022-07-13 12:52:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93128 states, 93127 states have (on average 1.1820739420361441) internal successors, (110083), 93127 states have internal predecessors, (110083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93128 states to 93128 states and 110083 transitions. [2022-07-13 12:52:04,563 INFO L78 Accepts]: Start accepts. Automaton has 93128 states and 110083 transitions. Word has length 372 [2022-07-13 12:52:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:04,563 INFO L495 AbstractCegarLoop]: Abstraction has 93128 states and 110083 transitions. [2022-07-13 12:52:04,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 93128 states and 110083 transitions. [2022-07-13 12:52:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-07-13 12:52:04,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:04,570 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:04,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 12:52:04,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -61006828, now seen corresponding path program 1 times [2022-07-13 12:52:04,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:04,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322664466] [2022-07-13 12:52:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:04,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-13 12:52:04,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:04,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322664466] [2022-07-13 12:52:04,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322664466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:04,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:04,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:04,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655295871] [2022-07-13 12:52:04,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:04,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:04,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:04,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:04,897 INFO L87 Difference]: Start difference. First operand 93128 states and 110083 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:07,409 INFO L93 Difference]: Finished difference Result 190009 states and 223998 transitions. [2022-07-13 12:52:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 423 [2022-07-13 12:52:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:07,512 INFO L225 Difference]: With dead ends: 190009 [2022-07-13 12:52:07,512 INFO L226 Difference]: Without dead ends: 96132 [2022-07-13 12:52:07,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:07,557 INFO L413 NwaCegarLoop]: 1059 mSDtfsCounter, 803 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2096 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 2096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:07,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 1067 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 2096 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 12:52:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96132 states. [2022-07-13 12:52:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96132 to 90875. [2022-07-13 12:52:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90875 states, 90874 states have (on average 1.1520676981314788) internal successors, (104693), 90874 states have internal predecessors, (104693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90875 states to 90875 states and 104693 transitions. [2022-07-13 12:52:08,696 INFO L78 Accepts]: Start accepts. Automaton has 90875 states and 104693 transitions. Word has length 423 [2022-07-13 12:52:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:08,697 INFO L495 AbstractCegarLoop]: Abstraction has 90875 states and 104693 transitions. [2022-07-13 12:52:08,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 90875 states and 104693 transitions. [2022-07-13 12:52:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-13 12:52:08,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:08,702 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:08,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 12:52:08,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1882321360, now seen corresponding path program 1 times [2022-07-13 12:52:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:08,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957295676] [2022-07-13 12:52:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:08,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 125 proven. 108 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-07-13 12:52:08,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957295676] [2022-07-13 12:52:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957295676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:52:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888962068] [2022-07-13 12:52:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:52:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:52:08,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:52:08,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 12:52:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:09,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:52:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:52:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-13 12:52:09,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:52:09,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888962068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:09,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:52:09,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-13 12:52:09,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890235603] [2022-07-13 12:52:09,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:09,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:09,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 12:52:09,145 INFO L87 Difference]: Start difference. First operand 90875 states and 104693 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:11,765 INFO L93 Difference]: Finished difference Result 179495 states and 206955 transitions. [2022-07-13 12:52:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 427 [2022-07-13 12:52:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:11,872 INFO L225 Difference]: With dead ends: 179495 [2022-07-13 12:52:11,872 INFO L226 Difference]: Without dead ends: 89373 [2022-07-13 12:52:11,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 12:52:11,900 INFO L413 NwaCegarLoop]: 1301 mSDtfsCounter, 747 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:11,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1309 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 12:52:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89373 states. [2022-07-13 12:52:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89373 to 84867. [2022-07-13 12:52:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84867 states, 84866 states have (on average 1.107769896071454) internal successors, (94012), 84866 states have internal predecessors, (94012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84867 states to 84867 states and 94012 transitions. [2022-07-13 12:52:12,885 INFO L78 Accepts]: Start accepts. Automaton has 84867 states and 94012 transitions. Word has length 427 [2022-07-13 12:52:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:12,885 INFO L495 AbstractCegarLoop]: Abstraction has 84867 states and 94012 transitions. [2022-07-13 12:52:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 84867 states and 94012 transitions. [2022-07-13 12:52:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-07-13 12:52:12,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:12,891 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:12,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 12:52:13,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 12:52:13,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:13,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1284409237, now seen corresponding path program 1 times [2022-07-13 12:52:13,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:13,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844058306] [2022-07-13 12:52:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:13,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 509 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-13 12:52:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:13,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844058306] [2022-07-13 12:52:13,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844058306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:13,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:13,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857527986] [2022-07-13 12:52:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:13,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:13,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:13,199 INFO L87 Difference]: Start difference. First operand 84867 states and 94012 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:16,138 INFO L93 Difference]: Finished difference Result 184001 states and 202915 transitions. [2022-07-13 12:52:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 456 [2022-07-13 12:52:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:16,264 INFO L225 Difference]: With dead ends: 184001 [2022-07-13 12:52:16,264 INFO L226 Difference]: Without dead ends: 99887 [2022-07-13 12:52:16,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:16,299 INFO L413 NwaCegarLoop]: 1242 mSDtfsCounter, 650 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:16,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1250 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 12:52:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99887 states. [2022-07-13 12:52:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99887 to 94630. [2022-07-13 12:52:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94630 states, 94629 states have (on average 1.0941466146741485) internal successors, (103538), 94629 states have internal predecessors, (103538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94630 states to 94630 states and 103538 transitions. [2022-07-13 12:52:17,257 INFO L78 Accepts]: Start accepts. Automaton has 94630 states and 103538 transitions. Word has length 456 [2022-07-13 12:52:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:17,257 INFO L495 AbstractCegarLoop]: Abstraction has 94630 states and 103538 transitions. [2022-07-13 12:52:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 94630 states and 103538 transitions. [2022-07-13 12:52:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-07-13 12:52:17,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:17,265 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:17,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 12:52:17,265 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1182994588, now seen corresponding path program 1 times [2022-07-13 12:52:17,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:17,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306180490] [2022-07-13 12:52:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:17,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 363 proven. 108 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-13 12:52:17,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306180490] [2022-07-13 12:52:17,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306180490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:52:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018768075] [2022-07-13 12:52:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:17,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:52:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:52:17,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:52:17,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 12:52:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:52:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:52:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-13 12:52:17,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:52:17,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018768075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:17,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:52:17,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-13 12:52:17,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9195783] [2022-07-13 12:52:17,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:17,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:17,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 12:52:17,884 INFO L87 Difference]: Start difference. First operand 94630 states and 103538 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:20,220 INFO L93 Difference]: Finished difference Result 189258 states and 207072 transitions. [2022-07-13 12:52:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 507 [2022-07-13 12:52:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:20,318 INFO L225 Difference]: With dead ends: 189258 [2022-07-13 12:52:20,318 INFO L226 Difference]: Without dead ends: 95381 [2022-07-13 12:52:20,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 12:52:20,362 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 738 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:20,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 412 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 12:52:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95381 states. [2022-07-13 12:52:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95381 to 92377. [2022-07-13 12:52:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92377 states, 92376 states have (on average 1.0786243180046766) internal successors, (99639), 92376 states have internal predecessors, (99639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92377 states to 92377 states and 99639 transitions. [2022-07-13 12:52:21,639 INFO L78 Accepts]: Start accepts. Automaton has 92377 states and 99639 transitions. Word has length 507 [2022-07-13 12:52:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:21,639 INFO L495 AbstractCegarLoop]: Abstraction has 92377 states and 99639 transitions. [2022-07-13 12:52:21,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 92377 states and 99639 transitions. [2022-07-13 12:52:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2022-07-13 12:52:21,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:21,647 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:21,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 12:52:21,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:52:21,848 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1439974613, now seen corresponding path program 1 times [2022-07-13 12:52:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:21,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293946411] [2022-07-13 12:52:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-13 12:52:21,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:21,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293946411] [2022-07-13 12:52:21,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293946411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:21,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:21,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:21,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565470262] [2022-07-13 12:52:21,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:21,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:21,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:21,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:21,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:21,967 INFO L87 Difference]: Start difference. First operand 92377 states and 99639 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:24,318 INFO L93 Difference]: Finished difference Result 184001 states and 198520 transitions. [2022-07-13 12:52:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 508 [2022-07-13 12:52:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:24,412 INFO L225 Difference]: With dead ends: 184001 [2022-07-13 12:52:24,412 INFO L226 Difference]: Without dead ends: 92377 [2022-07-13 12:52:24,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:24,453 INFO L413 NwaCegarLoop]: 1233 mSDtfsCounter, 729 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:24,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1241 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 12:52:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92377 states. [2022-07-13 12:52:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92377 to 90875. [2022-07-13 12:52:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90875 states, 90874 states have (on average 1.0689856284525827) internal successors, (97143), 90874 states have internal predecessors, (97143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90875 states to 90875 states and 97143 transitions. [2022-07-13 12:52:25,326 INFO L78 Accepts]: Start accepts. Automaton has 90875 states and 97143 transitions. Word has length 508 [2022-07-13 12:52:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:25,326 INFO L495 AbstractCegarLoop]: Abstraction has 90875 states and 97143 transitions. [2022-07-13 12:52:25,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 90875 states and 97143 transitions. [2022-07-13 12:52:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-07-13 12:52:25,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:25,335 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 12:52:25,335 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1518596476, now seen corresponding path program 1 times [2022-07-13 12:52:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338674631] [2022-07-13 12:52:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 662 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-07-13 12:52:25,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:25,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338674631] [2022-07-13 12:52:25,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338674631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:25,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:25,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:25,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110298732] [2022-07-13 12:52:25,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:25,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:25,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:25,701 INFO L87 Difference]: Start difference. First operand 90875 states and 97143 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:28,410 INFO L93 Difference]: Finished difference Result 196017 states and 209602 transitions. [2022-07-13 12:52:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:28,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 524 [2022-07-13 12:52:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:28,528 INFO L225 Difference]: With dead ends: 196017 [2022-07-13 12:52:28,528 INFO L226 Difference]: Without dead ends: 105895 [2022-07-13 12:52:28,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:28,544 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 798 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:28,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 911 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 12:52:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105895 states. [2022-07-13 12:52:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105895 to 100638. [2022-07-13 12:52:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100638 states, 100637 states have (on average 1.0627304073054642) internal successors, (106950), 100637 states have internal predecessors, (106950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100638 states to 100638 states and 106950 transitions. [2022-07-13 12:52:29,558 INFO L78 Accepts]: Start accepts. Automaton has 100638 states and 106950 transitions. Word has length 524 [2022-07-13 12:52:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:29,559 INFO L495 AbstractCegarLoop]: Abstraction has 100638 states and 106950 transitions. [2022-07-13 12:52:29,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 100638 states and 106950 transitions. [2022-07-13 12:52:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-07-13 12:52:29,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:29,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:29,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 12:52:29,567 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 366156598, now seen corresponding path program 1 times [2022-07-13 12:52:29,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:29,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378562476] [2022-07-13 12:52:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:29,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-07-13 12:52:29,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:29,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378562476] [2022-07-13 12:52:29,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378562476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:29,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:29,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577701720] [2022-07-13 12:52:29,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:29,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:29,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:29,724 INFO L87 Difference]: Start difference. First operand 100638 states and 106950 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:32,787 INFO L93 Difference]: Finished difference Result 250840 states and 267692 transitions. [2022-07-13 12:52:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 528 [2022-07-13 12:52:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:33,203 INFO L225 Difference]: With dead ends: 250840 [2022-07-13 12:52:33,203 INFO L226 Difference]: Without dead ends: 150955 [2022-07-13 12:52:33,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:33,233 INFO L413 NwaCegarLoop]: 1211 mSDtfsCounter, 757 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:33,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1219 Invalid, 2923 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [512 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:52:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150955 states. [2022-07-13 12:52:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150955 to 147951. [2022-07-13 12:52:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147951 states, 147950 states have (on average 1.0615072659682325) internal successors, (157050), 147950 states have internal predecessors, (157050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147951 states to 147951 states and 157050 transitions. [2022-07-13 12:52:34,887 INFO L78 Accepts]: Start accepts. Automaton has 147951 states and 157050 transitions. Word has length 528 [2022-07-13 12:52:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:34,887 INFO L495 AbstractCegarLoop]: Abstraction has 147951 states and 157050 transitions. [2022-07-13 12:52:34,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 147951 states and 157050 transitions. [2022-07-13 12:52:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-07-13 12:52:34,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:34,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:34,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 12:52:34,902 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash 302124925, now seen corresponding path program 1 times [2022-07-13 12:52:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:34,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918408712] [2022-07-13 12:52:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-07-13 12:52:35,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:35,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918408712] [2022-07-13 12:52:35,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918408712] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:35,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:35,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:35,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334674403] [2022-07-13 12:52:35,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:35,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:35,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:35,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:35,342 INFO L87 Difference]: Start difference. First operand 147951 states and 157050 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:38,049 INFO L93 Difference]: Finished difference Result 298153 states and 316358 transitions. [2022-07-13 12:52:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:38,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 597 [2022-07-13 12:52:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:38,215 INFO L225 Difference]: With dead ends: 298153 [2022-07-13 12:52:38,215 INFO L226 Difference]: Without dead ends: 147951 [2022-07-13 12:52:38,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:38,261 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 672 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:38,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 1216 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 12:52:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147951 states. [2022-07-13 12:52:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147951 to 144196. [2022-07-13 12:52:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144196 states, 144195 states have (on average 1.048122334338916) internal successors, (151134), 144195 states have internal predecessors, (151134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144196 states to 144196 states and 151134 transitions. [2022-07-13 12:52:40,153 INFO L78 Accepts]: Start accepts. Automaton has 144196 states and 151134 transitions. Word has length 597 [2022-07-13 12:52:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:40,153 INFO L495 AbstractCegarLoop]: Abstraction has 144196 states and 151134 transitions. [2022-07-13 12:52:40,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 144196 states and 151134 transitions. [2022-07-13 12:52:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-07-13 12:52:40,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:40,169 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:40,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 12:52:40,169 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 333896575, now seen corresponding path program 1 times [2022-07-13 12:52:40,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:40,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191572086] [2022-07-13 12:52:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:40,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2022-07-13 12:52:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:40,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191572086] [2022-07-13 12:52:40,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191572086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:40,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:40,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:40,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758772596] [2022-07-13 12:52:40,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:40,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:40,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:40,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:40,314 INFO L87 Difference]: Start difference. First operand 144196 states and 151134 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:52:43,155 INFO L93 Difference]: Finished difference Result 307916 states and 323379 transitions. [2022-07-13 12:52:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:52:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 645 [2022-07-13 12:52:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:52:43,360 INFO L225 Difference]: With dead ends: 307916 [2022-07-13 12:52:43,360 INFO L226 Difference]: Without dead ends: 164473 [2022-07-13 12:52:43,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:43,434 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 830 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:52:43,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1117 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:52:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164473 states. [2022-07-13 12:52:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164473 to 160718. [2022-07-13 12:52:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160718 states, 160717 states have (on average 1.046360994792088) internal successors, (168168), 160717 states have internal predecessors, (168168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160718 states to 160718 states and 168168 transitions. [2022-07-13 12:52:45,491 INFO L78 Accepts]: Start accepts. Automaton has 160718 states and 168168 transitions. Word has length 645 [2022-07-13 12:52:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:52:45,492 INFO L495 AbstractCegarLoop]: Abstraction has 160718 states and 168168 transitions. [2022-07-13 12:52:45,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:52:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 160718 states and 168168 transitions. [2022-07-13 12:52:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-07-13 12:52:45,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:52:45,508 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:52:45,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 12:52:45,508 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:52:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:52:45,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1653208385, now seen corresponding path program 1 times [2022-07-13 12:52:45,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:52:45,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452895986] [2022-07-13 12:52:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:52:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:52:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:52:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 846 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-07-13 12:52:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:52:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452895986] [2022-07-13 12:52:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452895986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:52:45,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:52:45,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:52:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555237887] [2022-07-13 12:52:45,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:52:45,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:52:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:52:45,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:52:45,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:52:45,678 INFO L87 Difference]: Start difference. First operand 160718 states and 168168 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)