./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label11.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/Problem17_label11.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 d617eb63717df2c143c72a2b28226809849fdb6b46ba3b8819c6be91e87f3a08 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:13:37,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:13:37,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:13:37,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:13:37,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:13:37,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:13:37,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:13:37,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:13:37,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:13:37,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:13:37,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:13:37,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:13:37,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:13:37,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:13:37,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:13:37,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:13:37,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:13:37,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:13:37,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:13:37,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:13:37,373 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:13:37,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:13:37,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:13:37,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:13:37,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:13:37,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:13:37,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:13:37,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:13:37,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:13:37,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:13:37,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:13:37,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:13:37,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:13:37,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:13:37,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:13:37,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:13:37,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:13:37,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:13:37,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:13:37,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:13:37,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:13:37,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:13:37,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:13:37,410 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:13:37,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:13:37,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:13:37,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:13:37,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:13:37,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:13:37,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:13:37,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:13:37,415 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:13:37,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:13:37,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:13:37,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:13:37,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:13:37,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:13:37,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:13:37,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:13:37,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:13:37,417 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:13:37,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:13:37,419 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:13:37,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:13:37,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:13:37,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:13:37,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:13:37,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:13:37,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:13:37,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:13:37,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:13:37,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:13:37,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:13:37,421 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:13:37,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:13:37,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:13:37,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d617eb63717df2c143c72a2b28226809849fdb6b46ba3b8819c6be91e87f3a08 [2022-07-13 13:13:37,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:13:37,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:13:37,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:13:37,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:13:37,644 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:13:37,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2022-07-13 13:13:37,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f9f31f7/b99ad69df499464ca4aa913d21ff5f5d/FLAGf51775d79 [2022-07-13 13:13:38,145 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:13:38,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2022-07-13 13:13:38,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f9f31f7/b99ad69df499464ca4aa913d21ff5f5d/FLAGf51775d79 [2022-07-13 13:13:38,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f9f31f7/b99ad69df499464ca4aa913d21ff5f5d [2022-07-13 13:13:38,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:13:38,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:13:38,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:13:38,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:13:38,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:13:38,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:13:38" (1/1) ... [2022-07-13 13:13:38,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682d9cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:38, skipping insertion in model container [2022-07-13 13:13:38,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:13:38" (1/1) ... [2022-07-13 13:13:38,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:13:38,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:13:38,738 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/Problem17_label11.c[8243,8256] [2022-07-13 13:13:39,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:13:39,131 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:13:39,155 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/Problem17_label11.c[8243,8256] [2022-07-13 13:13:39,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:13:39,354 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:13:39,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39 WrapperNode [2022-07-13 13:13:39,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:13:39,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:13:39,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:13:39,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:13:39,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,588 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:13:39,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:13:39,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:13:39,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:13:39,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:13:39,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:13:39,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:13:39,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:13:39,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:13:39,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (1/1) ... [2022-07-13 13:13:39,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:13:39,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:39,977 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 13:13:40,039 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 13:13:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:13:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:13:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:13:40,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:13:40,131 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:13:40,132 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:13:42,523 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:13:42,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:13:42,536 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:13:42,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:13:42 BoogieIcfgContainer [2022-07-13 13:13:42,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:13:42,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:13:42,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:13:42,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:13:42,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:13:38" (1/3) ... [2022-07-13 13:13:42,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfd9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:13:42, skipping insertion in model container [2022-07-13 13:13:42,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:39" (2/3) ... [2022-07-13 13:13:42,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfd9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:13:42, skipping insertion in model container [2022-07-13 13:13:42,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:13:42" (3/3) ... [2022-07-13 13:13:42,547 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label11.c [2022-07-13 13:13:42,557 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:13:42,557 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:13:42,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:13:42,613 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@62dd5350, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1aa5a78f [2022-07-13 13:13:42,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:13:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 13:13:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 13:13:42,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:42,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:42,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2022-07-13 13:13:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:42,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010524854] [2022-07-13 13:13:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:42,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:42,879 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 13:13:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010524854] [2022-07-13 13:13:42,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010524854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:42,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:42,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:13:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515006448] [2022-07-13 13:13:42,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:42,913 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 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 13:13:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:45,194 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-07-13 13:13:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-07-13 13:13:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:45,211 INFO L225 Difference]: With dead ends: 1642 [2022-07-13 13:13:45,212 INFO L226 Difference]: Without dead ends: 975 [2022-07-13 13:13:45,216 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 13:13:45,218 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 434 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:45,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:13:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-13 13:13:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-07-13 13:13:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 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 13:13:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-07-13 13:13:45,279 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 56 [2022-07-13 13:13:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:45,280 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-07-13 13:13:45,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 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 13:13:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-07-13 13:13:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-13 13:13:45,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:45,283 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, 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] [2022-07-13 13:13:45,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:13:45,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1429655906, now seen corresponding path program 1 times [2022-07-13 13:13:45,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:45,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965725253] [2022-07-13 13:13:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:45,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:45,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965725253] [2022-07-13 13:13:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965725253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:45,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:45,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:45,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180014995] [2022-07-13 13:13:45,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:45,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:45,456 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 13:13:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:47,476 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-07-13 13:13:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:47,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2022-07-13 13:13:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:47,482 INFO L225 Difference]: With dead ends: 2814 [2022-07-13 13:13:47,483 INFO L226 Difference]: Without dead ends: 1844 [2022-07-13 13:13:47,484 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 13:13:47,485 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 435 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:47,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:13:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-13 13:13:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-07-13 13:13:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 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 13:13:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-07-13 13:13:47,522 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 126 [2022-07-13 13:13:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:47,523 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-07-13 13:13:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 13:13:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-07-13 13:13:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-13 13:13:47,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:47,528 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, 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] [2022-07-13 13:13:47,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:13:47,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -58398847, now seen corresponding path program 1 times [2022-07-13 13:13:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225267401] [2022-07-13 13:13:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:47,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:47,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225267401] [2022-07-13 13:13:47,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225267401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:47,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:47,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:13:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124864852] [2022-07-13 13:13:47,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:47,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:47,623 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 13:13:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:49,313 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-07-13 13:13:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2022-07-13 13:13:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:49,322 INFO L225 Difference]: With dead ends: 5395 [2022-07-13 13:13:49,322 INFO L226 Difference]: Without dead ends: 2701 [2022-07-13 13:13:49,326 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 13:13:49,327 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:49,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-07-13 13:13:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-07-13 13:13:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 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 13:13:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-07-13 13:13:49,363 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 148 [2022-07-13 13:13:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:49,364 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-07-13 13:13:49,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 13:13:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-07-13 13:13:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-13 13:13:49,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:49,366 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:49,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:13:49,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:49,367 INFO L85 PathProgramCache]: Analyzing trace with hash 886311573, now seen corresponding path program 1 times [2022-07-13 13:13:49,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:49,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548864944] [2022-07-13 13:13:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:49,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:49,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:49,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548864944] [2022-07-13 13:13:49,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548864944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:49,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:49,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:49,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164526894] [2022-07-13 13:13:49,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:49,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:49,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:49,545 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 13:13:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:51,100 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-07-13 13:13:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-07-13 13:13:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:51,112 INFO L225 Difference]: With dead ends: 7108 [2022-07-13 13:13:51,112 INFO L226 Difference]: Without dead ends: 4409 [2022-07-13 13:13:51,117 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 13:13:51,118 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:51,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:13:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-07-13 13:13:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-07-13 13:13:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 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 13:13:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-07-13 13:13:51,186 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 208 [2022-07-13 13:13:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:51,186 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-07-13 13:13:51,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 13:13:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-07-13 13:13:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-13 13:13:51,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:51,189 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, 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] [2022-07-13 13:13:51,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:13:51,189 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1180956656, now seen corresponding path program 1 times [2022-07-13 13:13:51,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:51,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569050126] [2022-07-13 13:13:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:51,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:13:51,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:51,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569050126] [2022-07-13 13:13:51,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569050126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:51,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:51,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:51,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556637694] [2022-07-13 13:13:51,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:51,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:51,319 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 13:13:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:52,947 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-07-13 13:13:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 210 [2022-07-13 13:13:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:52,967 INFO L225 Difference]: With dead ends: 10936 [2022-07-13 13:13:52,967 INFO L226 Difference]: Without dead ends: 6528 [2022-07-13 13:13:52,974 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 13:13:52,991 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 395 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:52,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-07-13 13:13:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-07-13 13:13:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 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 13:13:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-07-13 13:13:53,105 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 210 [2022-07-13 13:13:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:53,107 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-07-13 13:13:53,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 13:13:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-07-13 13:13:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-07-13 13:13:53,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:53,115 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, 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] [2022-07-13 13:13:53,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:13:53,117 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 17300182, now seen corresponding path program 1 times [2022-07-13 13:13:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:53,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387645541] [2022-07-13 13:13:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:53,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387645541] [2022-07-13 13:13:53,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387645541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:53,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:53,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:53,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820192035] [2022-07-13 13:13:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:53,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:53,262 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 13:13:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:54,891 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2022-07-13 13:13:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:54,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 276 [2022-07-13 13:13:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:54,907 INFO L225 Difference]: With dead ends: 10045 [2022-07-13 13:13:54,908 INFO L226 Difference]: Without dead ends: 5665 [2022-07-13 13:13:54,913 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 13:13:54,915 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 380 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:54,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-07-13 13:13:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2022-07-13 13:13:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 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 13:13:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2022-07-13 13:13:54,985 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 276 [2022-07-13 13:13:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:54,985 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2022-07-13 13:13:54,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 13:13:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2022-07-13 13:13:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-07-13 13:13:54,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:54,988 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:54,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:13:54,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:54,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1294482893, now seen corresponding path program 1 times [2022-07-13 13:13:54,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:54,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836157367] [2022-07-13 13:13:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:54,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 13:13:55,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836157367] [2022-07-13 13:13:55,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836157367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:55,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:55,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:55,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226130238] [2022-07-13 13:13:55,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:55,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:55,096 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 13:13:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:56,768 INFO L93 Difference]: Finished difference Result 13049 states and 15222 transitions. [2022-07-13 13:13:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 288 [2022-07-13 13:13:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:56,785 INFO L225 Difference]: With dead ends: 13049 [2022-07-13 13:13:56,785 INFO L226 Difference]: Without dead ends: 6942 [2022-07-13 13:13:56,791 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 13:13:56,792 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 493 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:56,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 630 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2022-07-13 13:13:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6512. [2022-07-13 13:13:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 1.1520503762862848) internal successors, (7501), 6511 states have internal predecessors, (7501), 0 states have call successors, (0), 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 13:13:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 7501 transitions. [2022-07-13 13:13:56,907 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 7501 transitions. Word has length 288 [2022-07-13 13:13:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:56,908 INFO L495 AbstractCegarLoop]: Abstraction has 6512 states and 7501 transitions. [2022-07-13 13:13:56,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 13:13:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 7501 transitions. [2022-07-13 13:13:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-07-13 13:13:56,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:56,912 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 13:13:56,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:13:56,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2010645672, now seen corresponding path program 1 times [2022-07-13 13:13:56,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:56,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391050722] [2022-07-13 13:13:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:56,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:57,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:57,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391050722] [2022-07-13 13:13:57,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391050722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:57,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:57,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:57,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32670327] [2022-07-13 13:13:57,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:57,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:57,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:57,018 INFO L87 Difference]: Start difference. First operand 6512 states and 7501 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 13:13:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:58,446 INFO L93 Difference]: Finished difference Result 16010 states and 18477 transitions. [2022-07-13 13:13:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 311 [2022-07-13 13:13:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:58,458 INFO L225 Difference]: With dead ends: 16010 [2022-07-13 13:13:58,459 INFO L226 Difference]: Without dead ends: 9500 [2022-07-13 13:13:58,465 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 13:13:58,465 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 416 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:58,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 337 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:13:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9500 states. [2022-07-13 13:13:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9500 to 8644. [2022-07-13 13:13:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 1.1545759574221914) internal successors, (9979), 8643 states have internal predecessors, (9979), 0 states have call successors, (0), 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 13:13:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 9979 transitions. [2022-07-13 13:13:58,548 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 9979 transitions. Word has length 311 [2022-07-13 13:13:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:58,549 INFO L495 AbstractCegarLoop]: Abstraction has 8644 states and 9979 transitions. [2022-07-13 13:13:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 13:13:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 9979 transitions. [2022-07-13 13:13:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-13 13:13:58,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:58,554 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, 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, 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 13:13:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:13:58,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash -305663653, now seen corresponding path program 1 times [2022-07-13 13:13:58,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:58,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701750512] [2022-07-13 13:13:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:58,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 314 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701750512] [2022-07-13 13:13:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701750512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067855852] [2022-07-13 13:13:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:58,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:13:58,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:58,691 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 13:13:58,694 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 13:13:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:13:58,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:13:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 13:13:59,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:13:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 13:13:59,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067855852] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 13:13:59,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 13:13:59,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-13 13:13:59,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361161862] [2022-07-13 13:13:59,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 13:13:59,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 13:13:59,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 13:13:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:13:59,852 INFO L87 Difference]: Start difference. First operand 8644 states and 9979 transitions. Second operand has 9 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 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 13:14:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:12,024 INFO L93 Difference]: Finished difference Result 56145 states and 64619 transitions. [2022-07-13 13:14:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 13:14:12,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 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 316 [2022-07-13 13:14:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:12,092 INFO L225 Difference]: With dead ends: 56145 [2022-07-13 13:14:12,092 INFO L226 Difference]: Without dead ends: 44098 [2022-07-13 13:14:12,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2022-07-13 13:14:12,109 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 8952 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 11904 mSolverCounterSat, 3176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8952 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 15080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3176 IncrementalHoareTripleChecker+Valid, 11904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:12,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8952 Valid, 539 Invalid, 15080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3176 Valid, 11904 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-07-13 13:14:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44098 states. [2022-07-13 13:14:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44098 to 37618. [2022-07-13 13:14:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37618 states, 37617 states have (on average 1.1386075444612809) internal successors, (42831), 37617 states have internal predecessors, (42831), 0 states have call successors, (0), 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 13:14:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37618 states to 37618 states and 42831 transitions. [2022-07-13 13:14:12,623 INFO L78 Accepts]: Start accepts. Automaton has 37618 states and 42831 transitions. Word has length 316 [2022-07-13 13:14:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:12,623 INFO L495 AbstractCegarLoop]: Abstraction has 37618 states and 42831 transitions. [2022-07-13 13:14:12,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 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 13:14:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 37618 states and 42831 transitions. [2022-07-13 13:14:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-07-13 13:14:12,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:12,632 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, 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, 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] [2022-07-13 13:14:12,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 13:14:12,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:12,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2143106740, now seen corresponding path program 1 times [2022-07-13 13:14:12,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:12,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050614754] [2022-07-13 13:14:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:12,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 541 proven. 80 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 13:14:13,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:13,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050614754] [2022-07-13 13:14:13,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050614754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:14:13,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514880979] [2022-07-13 13:14:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:14:13,015 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 13:14:13,018 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 13:14:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:13,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:14:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:14:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 621 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 13:14:13,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:14:13,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514880979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:13,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:14:13,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-13 13:14:13,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48395017] [2022-07-13 13:14:13,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:13,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:13,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:14:13,480 INFO L87 Difference]: Start difference. First operand 37618 states and 42831 transitions. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 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 13:14:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:15,686 INFO L93 Difference]: Finished difference Result 82884 states and 94294 transitions. [2022-07-13 13:14:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:15,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 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 398 [2022-07-13 13:14:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:15,743 INFO L225 Difference]: With dead ends: 82884 [2022-07-13 13:14:15,743 INFO L226 Difference]: Without dead ends: 45693 [2022-07-13 13:14:15,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:14:15,764 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 826 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:15,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 322 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:14:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45693 states. [2022-07-13 13:14:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45693 to 44418. [2022-07-13 13:14:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44418 states, 44417 states have (on average 1.1227232816264043) internal successors, (49868), 44417 states have internal predecessors, (49868), 0 states have call successors, (0), 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 13:14:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44418 states to 44418 states and 49868 transitions. [2022-07-13 13:14:16,234 INFO L78 Accepts]: Start accepts. Automaton has 44418 states and 49868 transitions. Word has length 398 [2022-07-13 13:14:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:16,234 INFO L495 AbstractCegarLoop]: Abstraction has 44418 states and 49868 transitions. [2022-07-13 13:14:16,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 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 13:14:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 44418 states and 49868 transitions. [2022-07-13 13:14:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-07-13 13:14:16,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:16,245 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, 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, 3, 3, 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] [2022-07-13 13:14:16,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 13:14:16,459 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,SelfDestructingSolverStorable9 [2022-07-13 13:14:16,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:16,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1107030547, now seen corresponding path program 1 times [2022-07-13 13:14:16,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:16,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891456556] [2022-07-13 13:14:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-13 13:14:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:16,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891456556] [2022-07-13 13:14:16,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891456556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:16,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:16,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:16,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812627169] [2022-07-13 13:14:16,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:16,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:16,622 INFO L87 Difference]: Start difference. First operand 44418 states and 49868 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 13:14:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:18,623 INFO L93 Difference]: Finished difference Result 102479 states and 115557 transitions. [2022-07-13 13:14:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 446 [2022-07-13 13:14:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:18,704 INFO L225 Difference]: With dead ends: 102479 [2022-07-13 13:14:18,704 INFO L226 Difference]: Without dead ends: 58913 [2022-07-13 13:14:18,738 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 13:14:18,739 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 300 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:18,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 824 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:14:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58913 states. [2022-07-13 13:14:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58913 to 54212. [2022-07-13 13:14:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54212 states, 54211 states have (on average 1.1144417184704212) internal successors, (60415), 54211 states have internal predecessors, (60415), 0 states have call successors, (0), 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 13:14:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54212 states to 54212 states and 60415 transitions. [2022-07-13 13:14:19,487 INFO L78 Accepts]: Start accepts. Automaton has 54212 states and 60415 transitions. Word has length 446 [2022-07-13 13:14:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:19,487 INFO L495 AbstractCegarLoop]: Abstraction has 54212 states and 60415 transitions. [2022-07-13 13:14:19,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 13:14:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 54212 states and 60415 transitions. [2022-07-13 13:14:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-07-13 13:14:19,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:19,497 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, 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, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:19,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:14:19,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1055869948, now seen corresponding path program 1 times [2022-07-13 13:14:19,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:19,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164021024] [2022-07-13 13:14:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:19,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-13 13:14:19,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164021024] [2022-07-13 13:14:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164021024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:19,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:19,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:19,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762814191] [2022-07-13 13:14:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:19,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:19,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:19,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:19,624 INFO L87 Difference]: Start difference. First operand 54212 states and 60415 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 13:14:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:21,387 INFO L93 Difference]: Finished difference Result 110116 states and 123123 transitions. [2022-07-13 13:14:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:21,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 479 [2022-07-13 13:14:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:21,455 INFO L225 Difference]: With dead ends: 110116 [2022-07-13 13:14:21,455 INFO L226 Difference]: Without dead ends: 56756 [2022-07-13 13:14:21,485 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 13:14:21,486 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 278 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:21,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 792 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:14:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56756 states. [2022-07-13 13:14:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56756 to 56756. [2022-07-13 13:14:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56756 states, 56755 states have (on average 1.1015945731653598) internal successors, (62521), 56755 states have internal predecessors, (62521), 0 states have call successors, (0), 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 13:14:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56756 states to 56756 states and 62521 transitions. [2022-07-13 13:14:22,217 INFO L78 Accepts]: Start accepts. Automaton has 56756 states and 62521 transitions. Word has length 479 [2022-07-13 13:14:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:22,218 INFO L495 AbstractCegarLoop]: Abstraction has 56756 states and 62521 transitions. [2022-07-13 13:14:22,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 13:14:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56756 states and 62521 transitions. [2022-07-13 13:14:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-07-13 13:14:22,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:22,226 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, 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, 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] [2022-07-13 13:14:22,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:14:22,226 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash 185758288, now seen corresponding path program 1 times [2022-07-13 13:14:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068688680] [2022-07-13 13:14:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:22,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 440 proven. 82 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 13:14:22,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:22,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068688680] [2022-07-13 13:14:22,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068688680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:14:22,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850284960] [2022-07-13 13:14:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:14:22,364 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 13:14:22,365 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 13:14:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:22,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:14:22,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:14:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 440 proven. 82 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 13:14:22,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:14:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 13:14:23,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850284960] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:14:23,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:14:23,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:14:23,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877177553] [2022-07-13 13:14:23,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:23,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:23,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:14:23,180 INFO L87 Difference]: Start difference. First operand 56756 states and 62521 transitions. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 13:14:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:26,125 INFO L93 Difference]: Finished difference Result 136897 states and 150800 transitions. [2022-07-13 13:14:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 480 [2022-07-13 13:14:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:26,230 INFO L225 Difference]: With dead ends: 136897 [2022-07-13 13:14:26,230 INFO L226 Difference]: Without dead ends: 80140 [2022-07-13 13:14:26,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 955 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:14:26,273 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 798 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:26,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 132 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 13:14:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80140 states. [2022-07-13 13:14:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80140 to 76734. [2022-07-13 13:14:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76734 states, 76733 states have (on average 1.0854000234579646) internal successors, (83286), 76733 states have internal predecessors, (83286), 0 states have call successors, (0), 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 13:14:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76734 states to 76734 states and 83286 transitions. [2022-07-13 13:14:27,234 INFO L78 Accepts]: Start accepts. Automaton has 76734 states and 83286 transitions. Word has length 480 [2022-07-13 13:14:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:27,235 INFO L495 AbstractCegarLoop]: Abstraction has 76734 states and 83286 transitions. [2022-07-13 13:14:27,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 13:14:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 76734 states and 83286 transitions. [2022-07-13 13:14:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-07-13 13:14:27,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:27,244 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:27,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 13:14:27,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:27,444 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash -580298165, now seen corresponding path program 1 times [2022-07-13 13:14:27,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:27,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970905452] [2022-07-13 13:14:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:27,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 794 proven. 72 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 13:14:27,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:27,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970905452] [2022-07-13 13:14:27,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970905452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:14:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747656643] [2022-07-13 13:14:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:27,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:27,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:14:27,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:14:27,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 13:14:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:14:27,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:14:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 866 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 13:14:28,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:14:28,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747656643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:28,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:14:28,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-13 13:14:28,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230532810] [2022-07-13 13:14:28,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:28,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:14:28,225 INFO L87 Difference]: Start difference. First operand 76734 states and 83286 transitions. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 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 13:14:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:30,576 INFO L93 Difference]: Finished difference Result 156875 states and 170216 transitions. [2022-07-13 13:14:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 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 495 [2022-07-13 13:14:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:30,668 INFO L225 Difference]: With dead ends: 156875 [2022-07-13 13:14:30,668 INFO L226 Difference]: Without dead ends: 80993 [2022-07-13 13:14:30,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:14:30,708 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 802 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:30,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 284 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:14:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80993 states. [2022-07-13 13:14:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80993 to 80142. [2022-07-13 13:14:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80142 states, 80141 states have (on average 1.0832033540884192) internal successors, (86809), 80141 states have internal predecessors, (86809), 0 states have call successors, (0), 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 13:14:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80142 states to 80142 states and 86809 transitions. [2022-07-13 13:14:31,758 INFO L78 Accepts]: Start accepts. Automaton has 80142 states and 86809 transitions. Word has length 495 [2022-07-13 13:14:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:31,758 INFO L495 AbstractCegarLoop]: Abstraction has 80142 states and 86809 transitions. [2022-07-13 13:14:31,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 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 13:14:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 80142 states and 86809 transitions. [2022-07-13 13:14:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-07-13 13:14:31,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:31,770 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:14:31,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 13:14:31,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:31,987 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1973620001, now seen corresponding path program 1 times [2022-07-13 13:14:31,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:31,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696813538] [2022-07-13 13:14:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:31,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 823 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:14:32,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:32,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696813538] [2022-07-13 13:14:32,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696813538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:32,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:32,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:14:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176877341] [2022-07-13 13:14:32,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:32,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:32,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:32,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:32,138 INFO L87 Difference]: Start difference. First operand 80142 states and 86809 transitions. Second operand has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 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 13:14:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:35,332 INFO L93 Difference]: Finished difference Result 201617 states and 218547 transitions. [2022-07-13 13:14:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 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 557 [2022-07-13 13:14:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:35,489 INFO L225 Difference]: With dead ends: 201617 [2022-07-13 13:14:35,489 INFO L226 Difference]: Without dead ends: 122327 [2022-07-13 13:14:35,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:35,524 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 765 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:35,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 182 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 13:14:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122327 states. [2022-07-13 13:14:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122327 to 105718. [2022-07-13 13:14:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105718 states, 105717 states have (on average 1.0820776223313184) internal successors, (114394), 105717 states have internal predecessors, (114394), 0 states have call successors, (0), 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 13:14:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105718 states to 105718 states and 114394 transitions. [2022-07-13 13:14:36,946 INFO L78 Accepts]: Start accepts. Automaton has 105718 states and 114394 transitions. Word has length 557 [2022-07-13 13:14:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:36,946 INFO L495 AbstractCegarLoop]: Abstraction has 105718 states and 114394 transitions. [2022-07-13 13:14:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 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 13:14:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 105718 states and 114394 transitions. [2022-07-13 13:14:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-07-13 13:14:36,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:36,957 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-07-13 13:14:36,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 13:14:36,958 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:36,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1933384568, now seen corresponding path program 1 times [2022-07-13 13:14:36,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:36,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151634750] [2022-07-13 13:14:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:36,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 800 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-07-13 13:14:37,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151634750] [2022-07-13 13:14:37,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151634750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:37,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:37,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:37,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402245789] [2022-07-13 13:14:37,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:37,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:37,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:37,427 INFO L87 Difference]: Start difference. First operand 105718 states and 114394 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 13:14:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:39,653 INFO L93 Difference]: Finished difference Result 231441 states and 251218 transitions. [2022-07-13 13:14:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 559 [2022-07-13 13:14:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:39,832 INFO L225 Difference]: With dead ends: 231441 [2022-07-13 13:14:39,832 INFO L226 Difference]: Without dead ends: 126575 [2022-07-13 13:14:40,054 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 13:14:40,055 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 312 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:40,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 292 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:14:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126575 states. [2022-07-13 13:14:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126575 to 124428. [2022-07-13 13:14:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124428 states, 124427 states have (on average 1.0736013887661038) internal successors, (133585), 124427 states have internal predecessors, (133585), 0 states have call successors, (0), 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 13:14:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124428 states to 124428 states and 133585 transitions. [2022-07-13 13:14:41,847 INFO L78 Accepts]: Start accepts. Automaton has 124428 states and 133585 transitions. Word has length 559 [2022-07-13 13:14:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:41,848 INFO L495 AbstractCegarLoop]: Abstraction has 124428 states and 133585 transitions. [2022-07-13 13:14:41,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 13:14:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 124428 states and 133585 transitions. [2022-07-13 13:14:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-07-13 13:14:41,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:41,859 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:14:41,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 13:14:41,859 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash 477452430, now seen corresponding path program 1 times [2022-07-13 13:14:41,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147466832] [2022-07-13 13:14:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:41,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 562 proven. 73 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-07-13 13:14:42,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147466832] [2022-07-13 13:14:42,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147466832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:14:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751629528] [2022-07-13 13:14:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:42,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:14:42,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:14:42,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 13:14:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:14:42,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:14:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 992 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 13:14:42,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:14:42,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751629528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:42,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:14:42,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-07-13 13:14:42,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669527046] [2022-07-13 13:14:42,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:42,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 13:14:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 13:14:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:14:42,863 INFO L87 Difference]: Start difference. First operand 124428 states and 133585 transitions. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 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 13:14:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:46,282 INFO L93 Difference]: Finished difference Result 274849 states and 294616 transitions. [2022-07-13 13:14:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:14:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 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 576 [2022-07-13 13:14:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:46,462 INFO L225 Difference]: With dead ends: 274849 [2022-07-13 13:14:46,462 INFO L226 Difference]: Without dead ends: 151273 [2022-07-13 13:14:46,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:14:46,526 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1154 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:46,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 279 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 13:14:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151273 states. [2022-07-13 13:14:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151273 to 137652. [2022-07-13 13:14:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137652 states, 137651 states have (on average 1.0712453959651582) internal successors, (147458), 137651 states have internal predecessors, (147458), 0 states have call successors, (0), 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 13:14:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137652 states to 137652 states and 147458 transitions. [2022-07-13 13:14:48,640 INFO L78 Accepts]: Start accepts. Automaton has 137652 states and 147458 transitions. Word has length 576 [2022-07-13 13:14:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:48,640 INFO L495 AbstractCegarLoop]: Abstraction has 137652 states and 147458 transitions. [2022-07-13 13:14:48,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 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 13:14:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 137652 states and 147458 transitions. [2022-07-13 13:14:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2022-07-13 13:14:48,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:48,650 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:48,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 13:14:48,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 13:14:48,858 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1118465203, now seen corresponding path program 1 times [2022-07-13 13:14:48,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:48,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786511784] [2022-07-13 13:14:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:48,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-07-13 13:14:49,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:49,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786511784] [2022-07-13 13:14:49,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786511784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:49,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:49,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:49,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210081529] [2022-07-13 13:14:49,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:49,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:49,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:49,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:49,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:49,008 INFO L87 Difference]: Start difference. First operand 137652 states and 147458 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:14:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:51,905 INFO L93 Difference]: Finished difference Result 280401 states and 300193 transitions. [2022-07-13 13:14:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:51,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 584 [2022-07-13 13:14:51,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:52,106 INFO L225 Difference]: With dead ends: 280401 [2022-07-13 13:14:52,106 INFO L226 Difference]: Without dead ends: 143176 [2022-07-13 13:14:52,166 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 13:14:52,166 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 353 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:52,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 291 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:14:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143176 states. [2022-07-13 13:14:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143176 to 141882. [2022-07-13 13:14:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141882 states, 141881 states have (on average 1.0644413275914322) internal successors, (151024), 141881 states have internal predecessors, (151024), 0 states have call successors, (0), 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 13:14:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141882 states to 141882 states and 151024 transitions. [2022-07-13 13:14:54,023 INFO L78 Accepts]: Start accepts. Automaton has 141882 states and 151024 transitions. Word has length 584 [2022-07-13 13:14:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:54,023 INFO L495 AbstractCegarLoop]: Abstraction has 141882 states and 151024 transitions. [2022-07-13 13:14:54,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:14:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 141882 states and 151024 transitions. [2022-07-13 13:14:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-07-13 13:14:54,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:54,034 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:14:54,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 13:14:54,034 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash -933120367, now seen corresponding path program 1 times [2022-07-13 13:14:54,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:54,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064885934] [2022-07-13 13:14:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:54,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-13 13:14:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:54,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064885934] [2022-07-13 13:14:54,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064885934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:54,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:54,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:54,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164934548] [2022-07-13 13:14:54,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:54,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:54,202 INFO L87 Difference]: Start difference. First operand 141882 states and 151024 transitions. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 13:14:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:56,478 INFO L93 Difference]: Finished difference Result 282916 states and 301196 transitions. [2022-07-13 13:14:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:56,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 617 [2022-07-13 13:14:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:56,675 INFO L225 Difference]: With dead ends: 282916 [2022-07-13 13:14:56,675 INFO L226 Difference]: Without dead ends: 141886 [2022-07-13 13:14:56,734 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 13:14:56,734 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 113 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:56,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 762 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:14:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141886 states. [2022-07-13 13:14:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141886 to 141032. [2022-07-13 13:14:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141032 states, 141031 states have (on average 1.0645319114237295) internal successors, (150132), 141031 states have internal predecessors, (150132), 0 states have call successors, (0), 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 13:14:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141032 states to 141032 states and 150132 transitions. [2022-07-13 13:14:58,820 INFO L78 Accepts]: Start accepts. Automaton has 141032 states and 150132 transitions. Word has length 617 [2022-07-13 13:14:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:58,820 INFO L495 AbstractCegarLoop]: Abstraction has 141032 states and 150132 transitions. [2022-07-13 13:14:58,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 13:14:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 141032 states and 150132 transitions. [2022-07-13 13:14:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2022-07-13 13:14:58,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:58,831 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:14:58,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 13:14:58,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash -82434060, now seen corresponding path program 1 times [2022-07-13 13:14:58,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:58,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911479334] [2022-07-13 13:14:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:14:58,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911479334] [2022-07-13 13:14:58,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911479334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:58,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:58,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867459964] [2022-07-13 13:14:58,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:58,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:58,997 INFO L87 Difference]: Start difference. First operand 141032 states and 150132 transitions. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 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 13:15:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:01,250 INFO L93 Difference]: Finished difference Result 289318 states and 308165 transitions. [2022-07-13 13:15:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 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 618 [2022-07-13 13:15:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:01,413 INFO L225 Difference]: With dead ends: 289318 [2022-07-13 13:15:01,413 INFO L226 Difference]: Without dead ends: 148712 [2022-07-13 13:15:01,478 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 13:15:01,478 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 441 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:01,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 214 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148712 states. [2022-07-13 13:15:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148712 to 142741. [2022-07-13 13:15:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142741 states, 142740 states have (on average 1.0640605296343002) internal successors, (151884), 142740 states have internal predecessors, (151884), 0 states have call successors, (0), 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 13:15:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142741 states to 142741 states and 151884 transitions. [2022-07-13 13:15:03,426 INFO L78 Accepts]: Start accepts. Automaton has 142741 states and 151884 transitions. Word has length 618 [2022-07-13 13:15:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:03,427 INFO L495 AbstractCegarLoop]: Abstraction has 142741 states and 151884 transitions. [2022-07-13 13:15:03,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 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 13:15:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 142741 states and 151884 transitions. [2022-07-13 13:15:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-07-13 13:15:03,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:03,438 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:15:03,439 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1435163274, now seen corresponding path program 1 times [2022-07-13 13:15:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438451256] [2022-07-13 13:15:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:03,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 1143 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-07-13 13:15:03,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:03,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438451256] [2022-07-13 13:15:03,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438451256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:03,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:03,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:03,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915666016] [2022-07-13 13:15:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:03,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:03,626 INFO L87 Difference]: Start difference. First operand 142741 states and 151884 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 13:15:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:05,905 INFO L93 Difference]: Finished difference Result 292288 states and 311151 transitions. [2022-07-13 13:15:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:05,905 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 621 [2022-07-13 13:15:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:06,089 INFO L225 Difference]: With dead ends: 292288 [2022-07-13 13:15:06,089 INFO L226 Difference]: Without dead ends: 150399 [2022-07-13 13:15:06,171 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 13:15:06,172 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 383 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:06,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 296 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:15:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150399 states. [2022-07-13 13:15:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150399 to 149541. [2022-07-13 13:15:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149541 states, 149540 states have (on average 1.0632807275645313) internal successors, (159003), 149540 states have internal predecessors, (159003), 0 states have call successors, (0), 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 13:15:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149541 states to 149541 states and 159003 transitions. [2022-07-13 13:15:08,189 INFO L78 Accepts]: Start accepts. Automaton has 149541 states and 159003 transitions. Word has length 621 [2022-07-13 13:15:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:08,189 INFO L495 AbstractCegarLoop]: Abstraction has 149541 states and 159003 transitions. [2022-07-13 13:15:08,189 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 13:15:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 149541 states and 159003 transitions. [2022-07-13 13:15:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-07-13 13:15:08,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:08,199 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:15:08,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 13:15:08,200 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash 710189751, now seen corresponding path program 1 times [2022-07-13 13:15:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:08,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69493926] [2022-07-13 13:15:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:08,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:15:08,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:08,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69493926] [2022-07-13 13:15:08,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69493926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:08,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:08,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:15:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625529675] [2022-07-13 13:15:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:08,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:08,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:08,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:08,706 INFO L87 Difference]: Start difference. First operand 149541 states and 159003 transitions. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 2 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)