./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem13_label03.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 39b8a4ae0f070887d4af4fec410b03e79c801778085245d1dd791c56546c3332 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:04:50,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:04:50,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:04:50,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:04:50,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:04:50,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:04:50,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:04:50,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:04:50,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:04:50,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:04:50,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:04:50,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:04:50,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:04:50,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:04:50,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:04:50,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:04:50,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:04:50,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:04:50,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:04:50,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:04:50,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:04:50,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:04:50,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:04:50,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:04:50,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:04:50,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:04:50,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:04:50,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:04:50,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:04:50,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:04:50,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:04:50,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:04:50,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:04:50,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:04:50,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:04:50,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:04:50,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:04:50,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:04:50,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:04:50,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:04:50,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:04:50,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:04:50,558 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:04:50,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:04:50,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:04:50,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:04:50,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:04:50,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:04:50,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:04:50,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:04:50,560 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:04:50,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:04:50,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:04:50,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:04:50,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:04:50,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:04:50,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:04:50,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:04:50,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:04:50,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:04:50,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:04:50,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:04:50,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:04:50,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:04:50,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:04:50,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:04:50,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:04:50,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:04:50,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:04:50,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:04:50,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:04:50,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:04:50,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:04:50,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:04:50,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:04:50,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:04:50,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b8a4ae0f070887d4af4fec410b03e79c801778085245d1dd791c56546c3332 [2021-12-21 11:04:50,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:04:50,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:04:50,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:04:50,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:04:50,744 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:04:50,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2021-12-21 11:04:50,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acaedd0fc/2bf3c28752cb40b4afd69d8fd901690f/FLAGd2dfaf005 [2021-12-21 11:04:51,332 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:04:51,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2021-12-21 11:04:51,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acaedd0fc/2bf3c28752cb40b4afd69d8fd901690f/FLAGd2dfaf005 [2021-12-21 11:04:51,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acaedd0fc/2bf3c28752cb40b4afd69d8fd901690f [2021-12-21 11:04:51,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:04:51,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:04:51,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:04:51,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:04:51,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:04:51,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:04:51" (1/1) ... [2021-12-21 11:04:51,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f98dfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:51, skipping insertion in model container [2021-12-21 11:04:51,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:04:51" (1/1) ... [2021-12-21 11:04:51,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:04:51,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:04:52,104 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/Problem13_label03.c[5036,5049] [2021-12-21 11:04:52,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:04:52,717 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:04:52,752 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/Problem13_label03.c[5036,5049] [2021-12-21 11:04:53,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:04:53,092 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:04:53,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53 WrapperNode [2021-12-21 11:04:53,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:04:53,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:04:53,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:04:53,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:04:53,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:53,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:53,631 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-21 11:04:53,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:04:53,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:04:53,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:04:53,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:04:53,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:53,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:53,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:53,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:54,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:54,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:54,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:54,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:04:54,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:04:54,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:04:54,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:04:54,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (1/1) ... [2021-12-21 11:04:54,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:04:54,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:04:54,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:04:54,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:04:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:04:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:04:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:04:54,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:04:54,280 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:04:54,282 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:04:57,752 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:04:57,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:04:57,766 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:04:57,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:04:57 BoogieIcfgContainer [2021-12-21 11:04:57,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:04:57,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:04:57,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:04:57,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:04:57,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:04:51" (1/3) ... [2021-12-21 11:04:57,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69470b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:04:57, skipping insertion in model container [2021-12-21 11:04:57,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:53" (2/3) ... [2021-12-21 11:04:57,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69470b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:04:57, skipping insertion in model container [2021-12-21 11:04:57,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:04:57" (3/3) ... [2021-12-21 11:04:57,775 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2021-12-21 11:04:57,779 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:04:57,779 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:04:57,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:04:57,818 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:04:57,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:04:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 11:04:57,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:04:57,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:04:57,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:04:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:04:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1089129850, now seen corresponding path program 1 times [2021-12-21 11:04:57,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:04:57,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003319731] [2021-12-21 11:04:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:04:57,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:04:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:04:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:04:58,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:04:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003319731] [2021-12-21 11:04:58,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003319731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:04:58,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:04:58,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:04:58,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69806667] [2021-12-21 11:04:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:04:58,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:04:58,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:04:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:04:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:04:58,083 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:01,914 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-21 11:05:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-21 11:05:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:01,936 INFO L225 Difference]: With dead ends: 3160 [2021-12-21 11:05:01,936 INFO L226 Difference]: Without dead ends: 1983 [2021-12-21 11:05:01,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:01,950 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1069 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:01,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-21 11:05:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-21 11:05:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-21 11:05:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-21 11:05:02,047 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 34 [2021-12-21 11:05:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:02,048 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-21 11:05:02,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-21 11:05:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 11:05:02,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:02,050 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:02,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:05:02,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1620758014, now seen corresponding path program 1 times [2021-12-21 11:05:02,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:02,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911040337] [2021-12-21 11:05:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:02,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:05:02,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:02,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911040337] [2021-12-21 11:05:02,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911040337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:02,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:02,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:05:02,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770573706] [2021-12-21 11:05:02,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:02,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:02,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:02,169 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:04,891 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2021-12-21 11:05:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-21 11:05:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:04,902 INFO L225 Difference]: With dead ends: 5456 [2021-12-21 11:05:04,902 INFO L226 Difference]: Without dead ends: 3528 [2021-12-21 11:05:04,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:04,906 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:04,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:05:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-12-21 11:05:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-12-21 11:05:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2021-12-21 11:05:04,962 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 99 [2021-12-21 11:05:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:04,962 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2021-12-21 11:05:04,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2021-12-21 11:05:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 11:05:04,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:04,964 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:04,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:05:04,965 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1762154579, now seen corresponding path program 1 times [2021-12-21 11:05:04,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:04,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86644095] [2021-12-21 11:05:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:04,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:05:05,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:05,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86644095] [2021-12-21 11:05:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86644095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:05,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:05,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:05:05,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613842680] [2021-12-21 11:05:05,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:05,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:05,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:05,038 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:07,899 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2021-12-21 11:05:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-21 11:05:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:07,938 INFO L225 Difference]: With dead ends: 10232 [2021-12-21 11:05:07,938 INFO L226 Difference]: Without dead ends: 6708 [2021-12-21 11:05:07,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:07,949 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:07,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:05:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2021-12-21 11:05:08,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2021-12-21 11:05:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2021-12-21 11:05:08,064 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 105 [2021-12-21 11:05:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:08,065 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2021-12-21 11:05:08,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2021-12-21 11:05:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 11:05:08,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:08,069 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:08,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:05:08,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash 684107752, now seen corresponding path program 1 times [2021-12-21 11:05:08,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143132823] [2021-12-21 11:05:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:08,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:05:08,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:08,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143132823] [2021-12-21 11:05:08,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143132823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:08,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:08,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:05:08,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849745387] [2021-12-21 11:05:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:08,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:08,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:08,201 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:11,424 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2021-12-21 11:05:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-12-21 11:05:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:11,453 INFO L225 Difference]: With dead ends: 17443 [2021-12-21 11:05:11,454 INFO L226 Difference]: Without dead ends: 10745 [2021-12-21 11:05:11,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:11,462 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:11,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 11:05:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-12-21 11:05:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2021-12-21 11:05:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2021-12-21 11:05:11,658 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 135 [2021-12-21 11:05:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:11,660 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2021-12-21 11:05:11,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2021-12-21 11:05:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 11:05:11,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:11,663 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:11,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:05:11,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 607750639, now seen corresponding path program 1 times [2021-12-21 11:05:11,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:11,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193740564] [2021-12-21 11:05:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:11,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:05:11,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193740564] [2021-12-21 11:05:11,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193740564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:11,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:11,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:05:11,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109883783] [2021-12-21 11:05:11,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:11,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:11,794 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:14,170 INFO L93 Difference]: Finished difference Result 20549 states and 28119 transitions. [2021-12-21 11:05:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-12-21 11:05:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:14,192 INFO L225 Difference]: With dead ends: 20549 [2021-12-21 11:05:14,193 INFO L226 Difference]: Without dead ends: 10669 [2021-12-21 11:05:14,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:14,202 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:14,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:05:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2021-12-21 11:05:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10669. [2021-12-21 11:05:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3539557555305586) internal successors, (14444), 10668 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14444 transitions. [2021-12-21 11:05:14,319 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14444 transitions. Word has length 145 [2021-12-21 11:05:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:14,319 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14444 transitions. [2021-12-21 11:05:14,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14444 transitions. [2021-12-21 11:05:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 11:05:14,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:14,321 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:14,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:05:14,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1291315781, now seen corresponding path program 1 times [2021-12-21 11:05:14,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:14,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098704919] [2021-12-21 11:05:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:14,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 11:05:14,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098704919] [2021-12-21 11:05:14,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098704919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:14,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:14,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:05:14,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300768811] [2021-12-21 11:05:14,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:14,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:14,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:14,424 INFO L87 Difference]: Start difference. First operand 10669 states and 14444 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:17,251 INFO L93 Difference]: Finished difference Result 30031 states and 41217 transitions. [2021-12-21 11:05:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:17,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 159 [2021-12-21 11:05:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:17,281 INFO L225 Difference]: With dead ends: 30031 [2021-12-21 11:05:17,281 INFO L226 Difference]: Without dead ends: 20151 [2021-12-21 11:05:17,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:17,290 INFO L933 BasicCegarLoop]: 1071 mSDtfsCounter, 736 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:17,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 1221 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:05:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-12-21 11:05:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 19337. [2021-12-21 11:05:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19336 states have (on average 1.24244931733554) internal successors, (24024), 19336 states have internal predecessors, (24024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 24024 transitions. [2021-12-21 11:05:17,486 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 24024 transitions. Word has length 159 [2021-12-21 11:05:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 24024 transitions. [2021-12-21 11:05:17,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 24024 transitions. [2021-12-21 11:05:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-21 11:05:17,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:17,490 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:05:17,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:05:17,490 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2086069409, now seen corresponding path program 1 times [2021-12-21 11:05:17,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961499324] [2021-12-21 11:05:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:17,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-21 11:05:17,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:17,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961499324] [2021-12-21 11:05:17,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961499324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:17,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:17,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:05:17,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987819246] [2021-12-21 11:05:17,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:17,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:17,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:17,611 INFO L87 Difference]: Start difference. First operand 19337 states and 24024 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:20,456 INFO L93 Difference]: Finished difference Result 44989 states and 55628 transitions. [2021-12-21 11:05:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 246 [2021-12-21 11:05:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:20,499 INFO L225 Difference]: With dead ends: 44989 [2021-12-21 11:05:20,500 INFO L226 Difference]: Without dead ends: 26441 [2021-12-21 11:05:20,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:20,518 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 728 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:20,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1213 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:05:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26441 states. [2021-12-21 11:05:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26441 to 26434. [2021-12-21 11:05:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26434 states, 26433 states have (on average 1.200582605076987) internal successors, (31735), 26433 states have internal predecessors, (31735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26434 states to 26434 states and 31735 transitions. [2021-12-21 11:05:20,906 INFO L78 Accepts]: Start accepts. Automaton has 26434 states and 31735 transitions. Word has length 246 [2021-12-21 11:05:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:20,907 INFO L470 AbstractCegarLoop]: Abstraction has 26434 states and 31735 transitions. [2021-12-21 11:05:20,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 26434 states and 31735 transitions. [2021-12-21 11:05:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-21 11:05:20,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:20,910 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:05:20,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:05:20,910 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1890725157, now seen corresponding path program 1 times [2021-12-21 11:05:20,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705634937] [2021-12-21 11:05:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:20,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:05:21,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705634937] [2021-12-21 11:05:21,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705634937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:21,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:21,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:21,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267668277] [2021-12-21 11:05:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:21,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:21,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:21,003 INFO L87 Difference]: Start difference. First operand 26434 states and 31735 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:23,917 INFO L93 Difference]: Finished difference Result 72535 states and 87971 transitions. [2021-12-21 11:05:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:23,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2021-12-21 11:05:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:23,978 INFO L225 Difference]: With dead ends: 72535 [2021-12-21 11:05:23,978 INFO L226 Difference]: Without dead ends: 46103 [2021-12-21 11:05:24,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:24,006 INFO L933 BasicCegarLoop]: 1848 mSDtfsCounter, 841 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:24,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 1984 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:05:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46103 states. [2021-12-21 11:05:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46103 to 43733. [2021-12-21 11:05:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43733 states, 43732 states have (on average 1.1691210097868838) internal successors, (51128), 43732 states have internal predecessors, (51128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43733 states to 43733 states and 51128 transitions. [2021-12-21 11:05:24,591 INFO L78 Accepts]: Start accepts. Automaton has 43733 states and 51128 transitions. Word has length 248 [2021-12-21 11:05:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:24,592 INFO L470 AbstractCegarLoop]: Abstraction has 43733 states and 51128 transitions. [2021-12-21 11:05:24,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 43733 states and 51128 transitions. [2021-12-21 11:05:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-21 11:05:24,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:24,596 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:05:24,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:05:24,597 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash -763381361, now seen corresponding path program 1 times [2021-12-21 11:05:24,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:24,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078222372] [2021-12-21 11:05:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:24,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:05:24,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078222372] [2021-12-21 11:05:24,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078222372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:24,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:24,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:24,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265955869] [2021-12-21 11:05:24,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:24,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:24,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:24,683 INFO L87 Difference]: Start difference. First operand 43733 states and 51128 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:27,813 INFO L93 Difference]: Finished difference Result 106364 states and 126458 transitions. [2021-12-21 11:05:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 261 [2021-12-21 11:05:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:27,887 INFO L225 Difference]: With dead ends: 106364 [2021-12-21 11:05:27,887 INFO L226 Difference]: Without dead ends: 63420 [2021-12-21 11:05:27,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:27,896 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 825 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:27,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 928 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:05:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63420 states. [2021-12-21 11:05:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63420 to 61835. [2021-12-21 11:05:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61835 states, 61834 states have (on average 1.159378335543552) internal successors, (71689), 61834 states have internal predecessors, (71689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61835 states to 61835 states and 71689 transitions. [2021-12-21 11:05:28,457 INFO L78 Accepts]: Start accepts. Automaton has 61835 states and 71689 transitions. Word has length 261 [2021-12-21 11:05:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:28,457 INFO L470 AbstractCegarLoop]: Abstraction has 61835 states and 71689 transitions. [2021-12-21 11:05:28,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 61835 states and 71689 transitions. [2021-12-21 11:05:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-21 11:05:28,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:28,461 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:05:28,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:05:28,461 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:28,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1249469047, now seen corresponding path program 1 times [2021-12-21 11:05:28,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:28,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546038604] [2021-12-21 11:05:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:28,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 63 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:05:28,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546038604] [2021-12-21 11:05:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546038604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:05:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765218611] [2021-12-21 11:05:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:28,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:05:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:05:28,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:05:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:05:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:05:28,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:05:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-21 11:05:29,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:05:29,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765218611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:29,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:05:29,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:05:29,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920243974] [2021-12-21 11:05:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:29,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:29,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:05:29,375 INFO L87 Difference]: Start difference. First operand 61835 states and 71689 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:32,122 INFO L93 Difference]: Finished difference Result 122879 states and 142583 transitions. [2021-12-21 11:05:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:32,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 275 [2021-12-21 11:05:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:32,188 INFO L225 Difference]: With dead ends: 122879 [2021-12-21 11:05:32,188 INFO L226 Difference]: Without dead ends: 61833 [2021-12-21 11:05:32,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:05:32,221 INFO L933 BasicCegarLoop]: 1357 mSDtfsCounter, 1172 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:32,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 1438 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:05:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61833 states. [2021-12-21 11:05:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61833 to 61832. [2021-12-21 11:05:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61832 states, 61831 states have (on average 1.1288350503792597) internal successors, (69797), 61831 states have internal predecessors, (69797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61832 states to 61832 states and 69797 transitions. [2021-12-21 11:05:33,024 INFO L78 Accepts]: Start accepts. Automaton has 61832 states and 69797 transitions. Word has length 275 [2021-12-21 11:05:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:33,024 INFO L470 AbstractCegarLoop]: Abstraction has 61832 states and 69797 transitions. [2021-12-21 11:05:33,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 61832 states and 69797 transitions. [2021-12-21 11:05:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-21 11:05:33,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:33,029 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:33,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:05:33,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 11:05:33,242 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:33,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:33,242 INFO L85 PathProgramCache]: Analyzing trace with hash -309568557, now seen corresponding path program 1 times [2021-12-21 11:05:33,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:33,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887607833] [2021-12-21 11:05:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:33,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 192 proven. 113 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 11:05:33,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887607833] [2021-12-21 11:05:33,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887607833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:05:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124233558] [2021-12-21 11:05:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:33,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:05:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:05:33,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:05:33,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:05:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:33,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:05:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:05:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-21 11:05:33,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:05:33,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124233558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:33,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:05:33,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:05:33,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016104910] [2021-12-21 11:05:33,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:33,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:33,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:05:33,942 INFO L87 Difference]: Start difference. First operand 61832 states and 69797 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:36,839 INFO L93 Difference]: Finished difference Result 122864 states and 138790 transitions. [2021-12-21 11:05:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 340 [2021-12-21 11:05:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:36,912 INFO L225 Difference]: With dead ends: 122864 [2021-12-21 11:05:36,912 INFO L226 Difference]: Without dead ends: 61821 [2021-12-21 11:05:36,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:05:36,921 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1071 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:36,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 818 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 2392 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:05:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61821 states. [2021-12-21 11:05:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61821 to 61031. [2021-12-21 11:05:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61031 states, 61030 states have (on average 1.094084876290349) internal successors, (66772), 61030 states have internal predecessors, (66772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61031 states to 61031 states and 66772 transitions. [2021-12-21 11:05:37,597 INFO L78 Accepts]: Start accepts. Automaton has 61031 states and 66772 transitions. Word has length 340 [2021-12-21 11:05:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:37,598 INFO L470 AbstractCegarLoop]: Abstraction has 61031 states and 66772 transitions. [2021-12-21 11:05:37,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61031 states and 66772 transitions. [2021-12-21 11:05:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-12-21 11:05:37,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:37,605 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 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] [2021-12-21 11:05:37,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:05:37,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 11:05:37,808 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1005452138, now seen corresponding path program 1 times [2021-12-21 11:05:37,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:37,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630724510] [2021-12-21 11:05:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:37,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-21 11:05:37,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:37,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630724510] [2021-12-21 11:05:37,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630724510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:37,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:37,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:37,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342084679] [2021-12-21 11:05:37,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:37,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:37,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:37,926 INFO L87 Difference]: Start difference. First operand 61031 states and 66772 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:41,550 INFO L93 Difference]: Finished difference Result 127683 states and 140599 transitions. [2021-12-21 11:05:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:41,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 363 [2021-12-21 11:05:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:41,759 INFO L225 Difference]: With dead ends: 127683 [2021-12-21 11:05:41,760 INFO L226 Difference]: Without dead ends: 77684 [2021-12-21 11:05:41,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:41,780 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 988 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:41,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 718 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 3008 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 11:05:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77684 states. [2021-12-21 11:05:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77684 to 61030. [2021-12-21 11:05:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61030 states, 61029 states have (on average 1.0940864179324583) internal successors, (66771), 61029 states have internal predecessors, (66771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61030 states to 61030 states and 66771 transitions. [2021-12-21 11:05:42,531 INFO L78 Accepts]: Start accepts. Automaton has 61030 states and 66771 transitions. Word has length 363 [2021-12-21 11:05:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:42,532 INFO L470 AbstractCegarLoop]: Abstraction has 61030 states and 66771 transitions. [2021-12-21 11:05:42,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 61030 states and 66771 transitions. [2021-12-21 11:05:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-12-21 11:05:42,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:42,537 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:42,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:05:42,538 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:42,538 INFO L85 PathProgramCache]: Analyzing trace with hash 421332255, now seen corresponding path program 1 times [2021-12-21 11:05:42,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798048133] [2021-12-21 11:05:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:42,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-21 11:05:42,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:42,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798048133] [2021-12-21 11:05:42,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798048133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:42,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:42,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:42,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240931134] [2021-12-21 11:05:42,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:42,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:42,640 INFO L87 Difference]: Start difference. First operand 61030 states and 66771 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:45,795 INFO L93 Difference]: Finished difference Result 141745 states and 156245 transitions. [2021-12-21 11:05:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-12-21 11:05:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:45,893 INFO L225 Difference]: With dead ends: 141745 [2021-12-21 11:05:45,894 INFO L226 Difference]: Without dead ends: 81504 [2021-12-21 11:05:45,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:45,932 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 914 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 978 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 3368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 978 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:45,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 791 Invalid, 3368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [978 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:05:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81504 states. [2021-12-21 11:05:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81504 to 79912. [2021-12-21 11:05:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79912 states, 79911 states have (on average 1.097208144060267) internal successors, (87679), 79911 states have internal predecessors, (87679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79912 states to 79912 states and 87679 transitions. [2021-12-21 11:05:46,959 INFO L78 Accepts]: Start accepts. Automaton has 79912 states and 87679 transitions. Word has length 390 [2021-12-21 11:05:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:46,960 INFO L470 AbstractCegarLoop]: Abstraction has 79912 states and 87679 transitions. [2021-12-21 11:05:46,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 79912 states and 87679 transitions. [2021-12-21 11:05:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-21 11:05:46,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:46,966 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:46,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:05:46,966 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:46,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1432798242, now seen corresponding path program 1 times [2021-12-21 11:05:46,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:46,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945085584] [2021-12-21 11:05:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:46,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-12-21 11:05:47,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945085584] [2021-12-21 11:05:47,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945085584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:47,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:47,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:47,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418370825] [2021-12-21 11:05:47,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:47,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:47,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:47,071 INFO L87 Difference]: Start difference. First operand 79912 states and 87679 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:49,926 INFO L93 Difference]: Finished difference Result 160614 states and 176158 transitions. [2021-12-21 11:05:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2021-12-21 11:05:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:50,039 INFO L225 Difference]: With dead ends: 160614 [2021-12-21 11:05:50,039 INFO L226 Difference]: Without dead ends: 81491 [2021-12-21 11:05:50,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:50,082 INFO L933 BasicCegarLoop]: 1419 mSDtfsCounter, 1005 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:50,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1505 Invalid, 3083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:05:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81491 states. [2021-12-21 11:05:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81491 to 79905. [2021-12-21 11:05:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79905 states, 79904 states have (on average 1.0707849419303164) internal successors, (85560), 79904 states have internal predecessors, (85560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79905 states to 79905 states and 85560 transitions. [2021-12-21 11:05:51,172 INFO L78 Accepts]: Start accepts. Automaton has 79905 states and 85560 transitions. Word has length 423 [2021-12-21 11:05:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:51,173 INFO L470 AbstractCegarLoop]: Abstraction has 79905 states and 85560 transitions. [2021-12-21 11:05:51,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 79905 states and 85560 transitions. [2021-12-21 11:05:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2021-12-21 11:05:51,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:51,189 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-21 11:05:51,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:05:51,189 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash 142937848, now seen corresponding path program 1 times [2021-12-21 11:05:51,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:51,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040739762] [2021-12-21 11:05:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:51,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 714 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-12-21 11:05:51,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:51,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040739762] [2021-12-21 11:05:51,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040739762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:51,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:51,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:51,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759103207] [2021-12-21 11:05:51,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:51,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:05:51,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:51,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:05:51,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:05:51,291 INFO L87 Difference]: Start difference. First operand 79905 states and 85560 transitions. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)