./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/Problem16_label01.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 67c147095efb46de95e554e09305e6c24ee3dfebae2911ec90ba2508ef10e1b1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 22:51:49,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 22:51:49,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 22:51:49,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 22:51:49,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 22:51:49,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 22:51:49,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 22:51:49,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 22:51:49,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 22:51:49,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 22:51:49,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 22:51:49,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 22:51:49,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 22:51:49,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 22:51:49,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 22:51:49,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 22:51:49,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 22:51:49,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 22:51:49,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 22:51:49,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 22:51:49,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 22:51:49,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 22:51:49,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 22:51:49,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 22:51:49,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 22:51:49,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 22:51:49,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 22:51:49,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 22:51:49,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 22:51:49,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 22:51:49,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 22:51:49,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 22:51:49,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 22:51:49,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 22:51:49,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 22:51:49,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 22:51:49,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 22:51:49,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 22:51:49,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 22:51:49,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 22:51:49,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 22:51:49,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 22:51:49,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 22:51:49,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 22:51:49,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 22:51:49,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 22:51:49,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 22:51:49,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 22:51:49,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 22:51:49,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 22:51:49,797 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 22:51:49,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 22:51:49,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 22:51:49,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 22:51:49,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 22:51:49,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 22:51:49,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 22:51:49,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 22:51:49,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 22:51:49,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 22:51:49,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 22:51:49,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 22:51:49,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 22:51:49,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 22:51:49,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 22:51:49,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 22:51:49,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:51:49,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 22:51:49,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 22:51:49,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 22:51:49,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 22:51:49,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 22:51:49,801 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 22:51:49,801 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 22:51:49,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 22:51:49,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67c147095efb46de95e554e09305e6c24ee3dfebae2911ec90ba2508ef10e1b1 [2021-12-27 22:51:50,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 22:51:50,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 22:51:50,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 22:51:50,068 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 22:51:50,069 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 22:51:50,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label01.c [2021-12-27 22:51:50,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7652d3425/35d318c63d66485bb20e03fcb9421f56/FLAG9e0cd2322 [2021-12-27 22:51:50,609 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 22:51:50,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label01.c [2021-12-27 22:51:50,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7652d3425/35d318c63d66485bb20e03fcb9421f56/FLAG9e0cd2322 [2021-12-27 22:51:50,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7652d3425/35d318c63d66485bb20e03fcb9421f56 [2021-12-27 22:51:50,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 22:51:50,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 22:51:50,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 22:51:50,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 22:51:50,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 22:51:50,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:51:50" (1/1) ... [2021-12-27 22:51:50,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b12e850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:50, skipping insertion in model container [2021-12-27 22:51:50,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:51:50" (1/1) ... [2021-12-27 22:51:50,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 22:51:50,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 22:51:50,895 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/Problem16_label01.c[2910,2923] [2021-12-27 22:51:51,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:51:51,143 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 22:51:51,161 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/Problem16_label01.c[2910,2923] [2021-12-27 22:51:51,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:51:51,365 INFO L208 MainTranslator]: Completed translation [2021-12-27 22:51:51,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51 WrapperNode [2021-12-27 22:51:51,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 22:51:51,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 22:51:51,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 22:51:51,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 22:51:51,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,488 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-27 22:51:51,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 22:51:51,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 22:51:51,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 22:51:51,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 22:51:51,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 22:51:51,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 22:51:51,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 22:51:51,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 22:51:51,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (1/1) ... [2021-12-27 22:51:51,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:51:51,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:51:51,681 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) [2021-12-27 22:51:51,694 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 [2021-12-27 22:51:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 22:51:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 22:51:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 22:51:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 22:51:51,756 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 22:51:51,757 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 22:51:53,163 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 22:51:53,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 22:51:53,176 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 22:51:53,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:51:53 BoogieIcfgContainer [2021-12-27 22:51:53,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 22:51:53,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 22:51:53,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 22:51:53,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 22:51:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 10:51:50" (1/3) ... [2021-12-27 22:51:53,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c16caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:51:53, skipping insertion in model container [2021-12-27 22:51:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:51:51" (2/3) ... [2021-12-27 22:51:53,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c16caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:51:53, skipping insertion in model container [2021-12-27 22:51:53,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:51:53" (3/3) ... [2021-12-27 22:51:53,184 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label01.c [2021-12-27 22:51:53,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 22:51:53,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 22:51:53,226 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 22:51:53,232 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 [2021-12-27 22:51:53,232 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 22:51:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 22:51:53,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:51:53,258 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] [2021-12-27 22:51:53,259 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:51:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:51:53,262 INFO L85 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2021-12-27 22:51:53,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:51:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036457978] [2021-12-27 22:51:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:51:53,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:51:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:51:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:51:53,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:51:53,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036457978] [2021-12-27 22:51:53,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036457978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:51:53,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:51:53,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:51:53,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397272808] [2021-12-27 22:51:53,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:51:53,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:51:53,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:51:53,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:51:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:51:53,445 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:51:54,853 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2021-12-27 22:51:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:51:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-27 22:51:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:51:54,867 INFO L225 Difference]: With dead ends: 1137 [2021-12-27 22:51:54,867 INFO L226 Difference]: Without dead ends: 662 [2021-12-27 22:51:54,870 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 [2021-12-27 22:51:54,872 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 358 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-27 22:51:54,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 114 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-27 22:51:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-27 22:51:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-27 22:51:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7004538577912254) internal successors, (1124), 661 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1124 transitions. [2021-12-27 22:51:54,924 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1124 transitions. Word has length 26 [2021-12-27 22:51:54,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:51:54,924 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1124 transitions. [2021-12-27 22:51:54,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1124 transitions. [2021-12-27 22:51:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-27 22:51:54,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:51:54,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:51:54,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 22:51:54,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:51:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:51:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 331722233, now seen corresponding path program 1 times [2021-12-27 22:51:54,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:51:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453447049] [2021-12-27 22:51:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:51:54,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:51:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:51:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:51:55,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:51:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453447049] [2021-12-27 22:51:55,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453447049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:51:55,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:51:55,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:51:55,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601490423] [2021-12-27 22:51:55,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:51:55,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:51:55,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:51:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:51:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:51:55,015 INFO L87 Difference]: Start difference. First operand 662 states and 1124 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:51:55,972 INFO L93 Difference]: Finished difference Result 1980 states and 3367 transitions. [2021-12-27 22:51:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:51:55,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-27 22:51:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:51:55,977 INFO L225 Difference]: With dead ends: 1980 [2021-12-27 22:51:55,977 INFO L226 Difference]: Without dead ends: 1320 [2021-12-27 22:51:55,979 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 [2021-12-27 22:51:55,980 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:51:55,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 22:51:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-27 22:51:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-27 22:51:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.620166793025019) internal successors, (2137), 1319 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2137 transitions. [2021-12-27 22:51:56,013 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2137 transitions. Word has length 92 [2021-12-27 22:51:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:51:56,013 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2137 transitions. [2021-12-27 22:51:56,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2137 transitions. [2021-12-27 22:51:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-27 22:51:56,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:51:56,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:51:56,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 22:51:56,015 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:51:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:51:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1037882789, now seen corresponding path program 1 times [2021-12-27 22:51:56,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:51:56,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154512918] [2021-12-27 22:51:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:51:56,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:51:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:51:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:51:56,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:51:56,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154512918] [2021-12-27 22:51:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154512918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:51:56,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:51:56,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:51:56,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679207042] [2021-12-27 22:51:56,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:51:56,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:51:56,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:51:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:51:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:51:56,074 INFO L87 Difference]: Start difference. First operand 1320 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:51:57,025 INFO L93 Difference]: Finished difference Result 3296 states and 5285 transitions. [2021-12-27 22:51:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:51:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-27 22:51:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:51:57,032 INFO L225 Difference]: With dead ends: 3296 [2021-12-27 22:51:57,032 INFO L226 Difference]: Without dead ends: 1978 [2021-12-27 22:51:57,034 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 [2021-12-27 22:51:57,035 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:51:57,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 22:51:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-27 22:51:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-27 22:51:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.3323216995447649) internal successors, (2634), 1977 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2634 transitions. [2021-12-27 22:51:57,064 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2634 transitions. Word has length 93 [2021-12-27 22:51:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:51:57,065 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2634 transitions. [2021-12-27 22:51:57,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2634 transitions. [2021-12-27 22:51:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-27 22:51:57,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:51:57,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:51:57,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 22:51:57,068 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:51:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:51:57,069 INFO L85 PathProgramCache]: Analyzing trace with hash 577723381, now seen corresponding path program 1 times [2021-12-27 22:51:57,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:51:57,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269891906] [2021-12-27 22:51:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:51:57,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:51:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:51:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:51:57,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:51:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269891906] [2021-12-27 22:51:57,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269891906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:51:57,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:51:57,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:51:57,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487636658] [2021-12-27 22:51:57,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:51:57,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:51:57,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:51:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:51:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:51:57,188 INFO L87 Difference]: Start difference. First operand 1978 states and 2634 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:51:58,211 INFO L93 Difference]: Finished difference Result 5928 states and 7897 transitions. [2021-12-27 22:51:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:51:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-12-27 22:51:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:51:58,242 INFO L225 Difference]: With dead ends: 5928 [2021-12-27 22:51:58,243 INFO L226 Difference]: Without dead ends: 3952 [2021-12-27 22:51:58,245 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 [2021-12-27 22:51:58,246 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-27 22:51:58,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 257 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-27 22:51:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-27 22:51:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-27 22:51:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.2171602126044039) internal successors, (4809), 3951 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4809 transitions. [2021-12-27 22:51:58,302 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4809 transitions. Word has length 185 [2021-12-27 22:51:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:51:58,303 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4809 transitions. [2021-12-27 22:51:58,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:51:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4809 transitions. [2021-12-27 22:51:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-27 22:51:58,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:51:58,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:51:58,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 22:51:58,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:51:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:51:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash -932017501, now seen corresponding path program 1 times [2021-12-27 22:51:58,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:51:58,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216038474] [2021-12-27 22:51:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:51:58,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:51:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:51:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 22:51:58,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:51:58,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216038474] [2021-12-27 22:51:58,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216038474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:51:58,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408434442] [2021-12-27 22:51:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:51:58,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:51:58,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:51:58,575 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) [2021-12-27 22:51:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 22:51:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:51:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 22:51:58,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:51:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-27 22:51:59,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:51:59,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408434442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:51:59,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:51:59,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-27 22:51:59,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579408823] [2021-12-27 22:51:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:51:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:51:59,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:51:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:51:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 22:51:59,376 INFO L87 Difference]: Start difference. First operand 3952 states and 4809 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:00,306 INFO L93 Difference]: Finished difference Result 5270 states and 6254 transitions. [2021-12-27 22:52:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 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 269 [2021-12-27 22:52:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:00,319 INFO L225 Difference]: With dead ends: 5270 [2021-12-27 22:52:00,320 INFO L226 Difference]: Without dead ends: 5268 [2021-12-27 22:52:00,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 22:52:00,322 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 109 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:00,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 158 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 22:52:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-27 22:52:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4610. [2021-12-27 22:52:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.2013451941852897) internal successors, (5537), 4609 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5537 transitions. [2021-12-27 22:52:00,376 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5537 transitions. Word has length 269 [2021-12-27 22:52:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:00,376 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5537 transitions. [2021-12-27 22:52:00,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5537 transitions. [2021-12-27 22:52:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-27 22:52:00,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:00,381 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:00,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 22:52:00,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:00,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:00,598 INFO L85 PathProgramCache]: Analyzing trace with hash 976027379, now seen corresponding path program 1 times [2021-12-27 22:52:00,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:00,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003828042] [2021-12-27 22:52:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:00,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 22:52:00,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003828042] [2021-12-27 22:52:00,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003828042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:00,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:00,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:00,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055409568] [2021-12-27 22:52:00,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:00,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:52:00,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:52:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 22:52:00,794 INFO L87 Difference]: Start difference. First operand 4610 states and 5537 transitions. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:02,025 INFO L93 Difference]: Finished difference Result 9588 states and 11454 transitions. [2021-12-27 22:52:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 22:52:02,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 378 [2021-12-27 22:52:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:02,065 INFO L225 Difference]: With dead ends: 9588 [2021-12-27 22:52:02,066 INFO L226 Difference]: Without dead ends: 4980 [2021-12-27 22:52:02,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 22:52:02,069 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 175 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:02,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-27 22:52:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2021-12-27 22:52:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 4939. [2021-12-27 22:52:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.1891454029971649) internal successors, (5872), 4938 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5872 transitions. [2021-12-27 22:52:02,117 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5872 transitions. Word has length 378 [2021-12-27 22:52:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:02,117 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 5872 transitions. [2021-12-27 22:52:02,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5872 transitions. [2021-12-27 22:52:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-12-27 22:52:02,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:02,122 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-27 22:52:02,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 22:52:02,123 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:02,123 INFO L85 PathProgramCache]: Analyzing trace with hash 884345414, now seen corresponding path program 1 times [2021-12-27 22:52:02,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713523992] [2021-12-27 22:52:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:02,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-27 22:52:02,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713523992] [2021-12-27 22:52:02,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713523992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665270193] [2021-12-27 22:52:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:02,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:02,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:02,270 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) [2021-12-27 22:52:02,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 22:52:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:52:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:52:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-27 22:52:03,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:52:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-27 22:52:06,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665270193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 22:52:06,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 22:52:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-12-27 22:52:06,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693848651] [2021-12-27 22:52:06,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 22:52:06,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 22:52:06,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 22:52:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-27 22:52:06,298 INFO L87 Difference]: Start difference. First operand 4939 states and 5872 transitions. Second operand has 8 states, 8 states have (on average 98.375) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:10,666 INFO L93 Difference]: Finished difference Result 16127 states and 19198 transitions. [2021-12-27 22:52:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 22:52:10,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 98.375) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 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 440 [2021-12-27 22:52:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:10,696 INFO L225 Difference]: With dead ends: 16127 [2021-12-27 22:52:10,696 INFO L226 Difference]: Without dead ends: 11519 [2021-12-27 22:52:10,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-27 22:52:10,701 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1676 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 4041 mSolverCounterSat, 1361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 5402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 4041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:10,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 41 Invalid, 5402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1361 Valid, 4041 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-27 22:52:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-27 22:52:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 7900. [2021-12-27 22:52:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.1711609064438537) internal successors, (9251), 7899 states have internal predecessors, (9251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 9251 transitions. [2021-12-27 22:52:10,832 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 9251 transitions. Word has length 440 [2021-12-27 22:52:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:10,833 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 9251 transitions. [2021-12-27 22:52:10,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.375) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 9251 transitions. [2021-12-27 22:52:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-12-27 22:52:10,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:10,839 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:10,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 22:52:11,057 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,SelfDestructingSolverStorable6 [2021-12-27 22:52:11,057 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1086070078, now seen corresponding path program 1 times [2021-12-27 22:52:11,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:11,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524153262] [2021-12-27 22:52:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:11,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-27 22:52:11,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:11,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524153262] [2021-12-27 22:52:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524153262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:11,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:11,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-27 22:52:11,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631174280] [2021-12-27 22:52:11,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:11,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 22:52:11,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 22:52:11,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:11,270 INFO L87 Difference]: Start difference. First operand 7900 states and 9251 transitions. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:12,938 INFO L93 Difference]: Finished difference Result 15512 states and 18192 transitions. [2021-12-27 22:52:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 22:52:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 465 [2021-12-27 22:52:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:12,948 INFO L225 Difference]: With dead ends: 15512 [2021-12-27 22:52:12,949 INFO L226 Difference]: Without dead ends: 7291 [2021-12-27 22:52:12,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:12,957 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 378 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:12,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 291 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-27 22:52:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2021-12-27 22:52:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 7267. [2021-12-27 22:52:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 1.076245527112579) internal successors, (7820), 7266 states have internal predecessors, (7820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 7820 transitions. [2021-12-27 22:52:13,043 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 7820 transitions. Word has length 465 [2021-12-27 22:52:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:13,043 INFO L470 AbstractCegarLoop]: Abstraction has 7267 states and 7820 transitions. [2021-12-27 22:52:13,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 7820 transitions. [2021-12-27 22:52:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-12-27 22:52:13,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:13,051 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:13,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 22:52:13,051 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash -225867367, now seen corresponding path program 1 times [2021-12-27 22:52:13,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:13,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508939742] [2021-12-27 22:52:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:13,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 22:52:13,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:13,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508939742] [2021-12-27 22:52:13,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508939742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:13,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:13,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:13,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116152603] [2021-12-27 22:52:13,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:13,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:13,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:13,188 INFO L87 Difference]: Start difference. First operand 7267 states and 7820 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:13,966 INFO L93 Difference]: Finished difference Result 16177 states and 17518 transitions. [2021-12-27 22:52:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 527 [2021-12-27 22:52:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:13,980 INFO L225 Difference]: With dead ends: 16177 [2021-12-27 22:52:13,980 INFO L226 Difference]: Without dead ends: 9241 [2021-12-27 22:52:13,988 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 [2021-12-27 22:52:13,991 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 171 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:13,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 456 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:52:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-12-27 22:52:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 7925. [2021-12-27 22:52:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7925 states, 7924 states have (on average 1.0663806158505804) internal successors, (8450), 7924 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7925 states to 7925 states and 8450 transitions. [2021-12-27 22:52:14,095 INFO L78 Accepts]: Start accepts. Automaton has 7925 states and 8450 transitions. Word has length 527 [2021-12-27 22:52:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:14,096 INFO L470 AbstractCegarLoop]: Abstraction has 7925 states and 8450 transitions. [2021-12-27 22:52:14,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7925 states and 8450 transitions. [2021-12-27 22:52:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-27 22:52:14,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:14,100 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-27 22:52:14,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 22:52:14,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1756168535, now seen corresponding path program 1 times [2021-12-27 22:52:14,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:14,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133308537] [2021-12-27 22:52:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:14,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 47 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:52:14,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:14,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133308537] [2021-12-27 22:52:14,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133308537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:14,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287126972] [2021-12-27 22:52:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:14,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:14,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:14,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:52:14,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 22:52:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 22:52:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:52:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:52:15,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:52:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 47 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:52:16,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287126972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 22:52:16,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 22:52:16,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2021-12-27 22:52:16,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745384563] [2021-12-27 22:52:16,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 22:52:16,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 22:52:16,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 22:52:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-12-27 22:52:16,504 INFO L87 Difference]: Start difference. First operand 7925 states and 8450 transitions. Second operand has 11 states, 11 states have (on average 146.27272727272728) internal successors, (1609), 10 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:18,736 INFO L93 Difference]: Finished difference Result 22478 states and 23947 transitions. [2021-12-27 22:52:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 22:52:18,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 146.27272727272728) internal successors, (1609), 10 states have internal predecessors, (1609), 0 states have call successors, (0), 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 537 [2021-12-27 22:52:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:18,754 INFO L225 Difference]: With dead ends: 22478 [2021-12-27 22:52:18,754 INFO L226 Difference]: Without dead ends: 14835 [2021-12-27 22:52:18,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-12-27 22:52:18,763 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1518 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3543 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 3543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:18,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 56 Invalid, 4030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 3543 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-27 22:52:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14835 states. [2021-12-27 22:52:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14835 to 9569. [2021-12-27 22:52:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9569 states, 9568 states have (on average 1.0617683946488294) internal successors, (10159), 9568 states have internal predecessors, (10159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9569 states to 9569 states and 10159 transitions. [2021-12-27 22:52:18,910 INFO L78 Accepts]: Start accepts. Automaton has 9569 states and 10159 transitions. Word has length 537 [2021-12-27 22:52:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:18,915 INFO L470 AbstractCegarLoop]: Abstraction has 9569 states and 10159 transitions. [2021-12-27 22:52:18,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 146.27272727272728) internal successors, (1609), 10 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9569 states and 10159 transitions. [2021-12-27 22:52:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-12-27 22:52:18,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:18,922 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:18,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 22:52:19,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:19,136 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1288894405, now seen corresponding path program 1 times [2021-12-27 22:52:19,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:19,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299684610] [2021-12-27 22:52:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:19,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 808 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-27 22:52:19,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299684610] [2021-12-27 22:52:19,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299684610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:19,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:19,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:19,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721368251] [2021-12-27 22:52:19,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:19,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:19,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:19,285 INFO L87 Difference]: Start difference. First operand 9569 states and 10159 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:20,081 INFO L93 Difference]: Finished difference Result 21439 states and 22949 transitions. [2021-12-27 22:52:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 668 [2021-12-27 22:52:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:20,096 INFO L225 Difference]: With dead ends: 21439 [2021-12-27 22:52:20,096 INFO L226 Difference]: Without dead ends: 12530 [2021-12-27 22:52:20,101 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 [2021-12-27 22:52:20,102 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 225 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:20,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 39 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:52:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12530 states. [2021-12-27 22:52:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12530 to 12530. [2021-12-27 22:52:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 1.0679224199856334) internal successors, (13380), 12529 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 13380 transitions. [2021-12-27 22:52:20,257 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 13380 transitions. Word has length 668 [2021-12-27 22:52:20,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:20,258 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 13380 transitions. [2021-12-27 22:52:20,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 13380 transitions. [2021-12-27 22:52:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2021-12-27 22:52:20,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:20,272 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-27 22:52:20,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 22:52:20,272 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1338555661, now seen corresponding path program 1 times [2021-12-27 22:52:20,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064472688] [2021-12-27 22:52:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:20,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 646 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2021-12-27 22:52:20,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:20,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064472688] [2021-12-27 22:52:20,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064472688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:20,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:20,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:20,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299557627] [2021-12-27 22:52:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:20,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:20,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:20,447 INFO L87 Difference]: Start difference. First operand 12530 states and 13380 transitions. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:21,095 INFO L93 Difference]: Finished difference Result 27690 states and 29728 transitions. [2021-12-27 22:52:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 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 757 [2021-12-27 22:52:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:21,117 INFO L225 Difference]: With dead ends: 27690 [2021-12-27 22:52:21,118 INFO L226 Difference]: Without dead ends: 15820 [2021-12-27 22:52:21,125 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 [2021-12-27 22:52:21,126 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:21,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 442 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 22:52:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15820 states. [2021-12-27 22:52:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15820 to 15162. [2021-12-27 22:52:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15162 states, 15161 states have (on average 1.0593628388628717) internal successors, (16061), 15161 states have internal predecessors, (16061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 16061 transitions. [2021-12-27 22:52:21,268 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 16061 transitions. Word has length 757 [2021-12-27 22:52:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:21,268 INFO L470 AbstractCegarLoop]: Abstraction has 15162 states and 16061 transitions. [2021-12-27 22:52:21,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 16061 transitions. [2021-12-27 22:52:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2021-12-27 22:52:21,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:21,278 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-27 22:52:21,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 22:52:21,278 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1713260066, now seen corresponding path program 1 times [2021-12-27 22:52:21,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:21,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035254258] [2021-12-27 22:52:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:21,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-12-27 22:52:21,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:21,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035254258] [2021-12-27 22:52:21,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035254258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:21,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:21,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:21,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284021061] [2021-12-27 22:52:21,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:21,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:21,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:21,444 INFO L87 Difference]: Start difference. First operand 15162 states and 16061 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:22,056 INFO L93 Difference]: Finished difference Result 34599 states and 36794 transitions. [2021-12-27 22:52:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 758 [2021-12-27 22:52:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:22,074 INFO L225 Difference]: With dead ends: 34599 [2021-12-27 22:52:22,074 INFO L226 Difference]: Without dead ends: 18781 [2021-12-27 22:52:22,084 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 [2021-12-27 22:52:22,085 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 273 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:22,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 429 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 22:52:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18781 states. [2021-12-27 22:52:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18781 to 18452. [2021-12-27 22:52:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18452 states, 18451 states have (on average 1.0428703051325132) internal successors, (19242), 18451 states have internal predecessors, (19242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18452 states to 18452 states and 19242 transitions. [2021-12-27 22:52:22,245 INFO L78 Accepts]: Start accepts. Automaton has 18452 states and 19242 transitions. Word has length 758 [2021-12-27 22:52:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:22,246 INFO L470 AbstractCegarLoop]: Abstraction has 18452 states and 19242 transitions. [2021-12-27 22:52:22,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 18452 states and 19242 transitions. [2021-12-27 22:52:22,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-12-27 22:52:22,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:22,256 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-27 22:52:22,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-27 22:52:22,257 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -73250812, now seen corresponding path program 1 times [2021-12-27 22:52:22,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:22,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806298561] [2021-12-27 22:52:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:22,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-12-27 22:52:22,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806298561] [2021-12-27 22:52:22,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806298561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:22,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:22,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:22,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847273535] [2021-12-27 22:52:22,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:22,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:22,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:22,458 INFO L87 Difference]: Start difference. First operand 18452 states and 19242 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:23,228 INFO L93 Difference]: Finished difference Result 36244 states and 37819 transitions. [2021-12-27 22:52:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:23,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 770 [2021-12-27 22:52:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:23,247 INFO L225 Difference]: With dead ends: 36244 [2021-12-27 22:52:23,247 INFO L226 Difference]: Without dead ends: 18452 [2021-12-27 22:52:23,258 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 [2021-12-27 22:52:23,259 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 251 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:23,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 429 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:52:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18452 states. [2021-12-27 22:52:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18452 to 18123. [2021-12-27 22:52:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18123 states, 18122 states have (on average 1.0321708420704117) internal successors, (18705), 18122 states have internal predecessors, (18705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18123 states to 18123 states and 18705 transitions. [2021-12-27 22:52:23,538 INFO L78 Accepts]: Start accepts. Automaton has 18123 states and 18705 transitions. Word has length 770 [2021-12-27 22:52:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:23,539 INFO L470 AbstractCegarLoop]: Abstraction has 18123 states and 18705 transitions. [2021-12-27 22:52:23,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 18123 states and 18705 transitions. [2021-12-27 22:52:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2021-12-27 22:52:23,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:23,587 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:23,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 22:52:23,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:23,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1580246159, now seen corresponding path program 1 times [2021-12-27 22:52:23,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:23,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92489602] [2021-12-27 22:52:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:23,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 48 proven. 507 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-27 22:52:23,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:23,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92489602] [2021-12-27 22:52:23,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92489602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353977857] [2021-12-27 22:52:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:23,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:23,886 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:52:23,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 22:52:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:24,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 22:52:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:52:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-27 22:52:24,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:52:24,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353977857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:24,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:52:24,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-27 22:52:24,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739555732] [2021-12-27 22:52:24,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:24,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:24,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:52:24,682 INFO L87 Difference]: Start difference. First operand 18123 states and 18705 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:25,442 INFO L93 Difference]: Finished difference Result 35586 states and 36745 transitions. [2021-12-27 22:52:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 786 [2021-12-27 22:52:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:25,459 INFO L225 Difference]: With dead ends: 35586 [2021-12-27 22:52:25,460 INFO L226 Difference]: Without dead ends: 18123 [2021-12-27 22:52:25,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:52:25,472 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 341 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:25,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 377 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:52:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18123 states. [2021-12-27 22:52:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18123 to 18123. [2021-12-27 22:52:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18123 states, 18122 states have (on average 1.0290806754221389) internal successors, (18649), 18122 states have internal predecessors, (18649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18123 states to 18123 states and 18649 transitions. [2021-12-27 22:52:25,652 INFO L78 Accepts]: Start accepts. Automaton has 18123 states and 18649 transitions. Word has length 786 [2021-12-27 22:52:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:25,652 INFO L470 AbstractCegarLoop]: Abstraction has 18123 states and 18649 transitions. [2021-12-27 22:52:25,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 18123 states and 18649 transitions. [2021-12-27 22:52:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2021-12-27 22:52:25,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:25,665 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:25,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 22:52:25,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-27 22:52:25,880 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash -169005392, now seen corresponding path program 1 times [2021-12-27 22:52:25,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:25,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882128240] [2021-12-27 22:52:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:25,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 859 proven. 139 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-27 22:52:26,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:26,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882128240] [2021-12-27 22:52:26,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882128240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:26,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315793276] [2021-12-27 22:52:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:26,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:26,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:26,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:52:26,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 22:52:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 22:52:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:52:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 811 proven. 201 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-27 22:52:30,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:52:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 811 proven. 201 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-27 22:52:35,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315793276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 22:52:35,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 22:52:35,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-27 22:52:35,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820241179] [2021-12-27 22:52:35,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 22:52:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 22:52:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 22:52:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-27 22:52:35,292 INFO L87 Difference]: Start difference. First operand 18123 states and 18649 transitions. Second operand has 9 states, 9 states have (on average 206.22222222222223) internal successors, (1856), 9 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:38,068 INFO L93 Difference]: Finished difference Result 43203 states and 44484 transitions. [2021-12-27 22:52:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-27 22:52:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 206.22222222222223) internal successors, (1856), 9 states have internal predecessors, (1856), 0 states have call successors, (0), 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 925 [2021-12-27 22:52:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:38,094 INFO L225 Difference]: With dead ends: 43203 [2021-12-27 22:52:38,094 INFO L226 Difference]: Without dead ends: 25716 [2021-12-27 22:52:38,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1865 GetRequests, 1852 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-27 22:52:38,108 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2686 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 4135 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2686 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 4135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:38,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2686 Valid, 59 Invalid, 4658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 4135 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-27 22:52:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25716 states. [2021-12-27 22:52:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25716 to 18452. [2021-12-27 22:52:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18452 states, 18451 states have (on average 1.0274781854642026) internal successors, (18958), 18451 states have internal predecessors, (18958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18452 states to 18452 states and 18958 transitions. [2021-12-27 22:52:38,300 INFO L78 Accepts]: Start accepts. Automaton has 18452 states and 18958 transitions. Word has length 925 [2021-12-27 22:52:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:38,301 INFO L470 AbstractCegarLoop]: Abstraction has 18452 states and 18958 transitions. [2021-12-27 22:52:38,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 206.22222222222223) internal successors, (1856), 9 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 18452 states and 18958 transitions. [2021-12-27 22:52:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2021-12-27 22:52:38,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:38,314 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:38,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 22:52:38,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-27 22:52:38,529 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1543050194, now seen corresponding path program 1 times [2021-12-27 22:52:38,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:38,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862912654] [2021-12-27 22:52:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:38,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 1097 proven. 156 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-12-27 22:52:38,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:38,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862912654] [2021-12-27 22:52:38,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862912654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:38,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736498659] [2021-12-27 22:52:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:38,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:38,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:52:38,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 22:52:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 22:52:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:52:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 1309 proven. 0 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2021-12-27 22:52:40,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:52:40,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736498659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:40,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:52:40,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-27 22:52:40,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038493273] [2021-12-27 22:52:40,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:40,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:40,209 INFO L87 Difference]: Start difference. First operand 18452 states and 18958 transitions. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:41,094 INFO L93 Difference]: Finished difference Result 35915 states and 36919 transitions. [2021-12-27 22:52:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:41,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 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 1021 [2021-12-27 22:52:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:41,126 INFO L225 Difference]: With dead ends: 35915 [2021-12-27 22:52:41,137 INFO L226 Difference]: Without dead ends: 17465 [2021-12-27 22:52:41,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:41,149 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 61 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:41,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 424 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-27 22:52:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17465 states. [2021-12-27 22:52:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17465 to 16478. [2021-12-27 22:52:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16478 states, 16477 states have (on average 1.0199672270437579) internal successors, (16806), 16477 states have internal predecessors, (16806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16478 states to 16478 states and 16806 transitions. [2021-12-27 22:52:41,404 INFO L78 Accepts]: Start accepts. Automaton has 16478 states and 16806 transitions. Word has length 1021 [2021-12-27 22:52:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:41,405 INFO L470 AbstractCegarLoop]: Abstraction has 16478 states and 16806 transitions. [2021-12-27 22:52:41,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 16478 states and 16806 transitions. [2021-12-27 22:52:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1400 [2021-12-27 22:52:41,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:41,438 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:41,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-27 22:52:41,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-27 22:52:41,656 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1023747313, now seen corresponding path program 1 times [2021-12-27 22:52:41,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:41,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008154344] [2021-12-27 22:52:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:41,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 1644 proven. 156 refuted. 0 times theorem prover too weak. 1727 trivial. 0 not checked. [2021-12-27 22:52:42,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:42,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008154344] [2021-12-27 22:52:42,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008154344] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:42,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428740995] [2021-12-27 22:52:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:42,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:42,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:52:42,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 22:52:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 22:52:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:52:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 3336 trivial. 0 not checked. [2021-12-27 22:52:43,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:52:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428740995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:43,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:52:43,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-27 22:52:43,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832194143] [2021-12-27 22:52:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:43,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:43,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:43,818 INFO L87 Difference]: Start difference. First operand 16478 states and 16806 transitions. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:44,518 INFO L93 Difference]: Finished difference Result 32296 states and 32948 transitions. [2021-12-27 22:52:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:44,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 1399 [2021-12-27 22:52:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:44,532 INFO L225 Difference]: With dead ends: 32296 [2021-12-27 22:52:44,532 INFO L226 Difference]: Without dead ends: 16478 [2021-12-27 22:52:44,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1403 GetRequests, 1398 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:44,541 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 344 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:44,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 31 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 22:52:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16478 states. [2021-12-27 22:52:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16478 to 15491. [2021-12-27 22:52:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15491 states, 15490 states have (on average 1.0182052937378954) internal successors, (15772), 15490 states have internal predecessors, (15772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15491 states to 15491 states and 15772 transitions. [2021-12-27 22:52:44,669 INFO L78 Accepts]: Start accepts. Automaton has 15491 states and 15772 transitions. Word has length 1399 [2021-12-27 22:52:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:44,670 INFO L470 AbstractCegarLoop]: Abstraction has 15491 states and 15772 transitions. [2021-12-27 22:52:44,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 15491 states and 15772 transitions. [2021-12-27 22:52:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2021-12-27 22:52:44,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:44,689 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 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, 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, 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] [2021-12-27 22:52:44,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 22:52:44,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:44,891 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash -479866144, now seen corresponding path program 1 times [2021-12-27 22:52:44,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:44,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435451911] [2021-12-27 22:52:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:44,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 2122 proven. 156 refuted. 0 times theorem prover too weak. 3161 trivial. 0 not checked. [2021-12-27 22:52:45,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:45,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435451911] [2021-12-27 22:52:45,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435451911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:45,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012608398] [2021-12-27 22:52:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:45,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:45,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:52:45,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 22:52:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:45,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:52:45,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:52:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 2278 proven. 0 refuted. 0 times theorem prover too weak. 3161 trivial. 0 not checked. [2021-12-27 22:52:47,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:52:47,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012608398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:47,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:52:47,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-27 22:52:47,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537469112] [2021-12-27 22:52:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:47,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:47,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:47,429 INFO L87 Difference]: Start difference. First operand 15491 states and 15772 transitions. Second operand has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:47,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:47,966 INFO L93 Difference]: Finished difference Result 31638 states and 32232 transitions. [2021-12-27 22:52:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:47,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 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 1536 [2021-12-27 22:52:47,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:47,978 INFO L225 Difference]: With dead ends: 31638 [2021-12-27 22:52:47,978 INFO L226 Difference]: Without dead ends: 16807 [2021-12-27 22:52:47,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 1535 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:47,984 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:47,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 92 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 22:52:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16807 states. [2021-12-27 22:52:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16807 to 16478. [2021-12-27 22:52:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16478 states, 16477 states have (on average 1.0180858165928264) internal successors, (16775), 16477 states have internal predecessors, (16775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16478 states to 16478 states and 16775 transitions. [2021-12-27 22:52:48,135 INFO L78 Accepts]: Start accepts. Automaton has 16478 states and 16775 transitions. Word has length 1536 [2021-12-27 22:52:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:48,135 INFO L470 AbstractCegarLoop]: Abstraction has 16478 states and 16775 transitions. [2021-12-27 22:52:48,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 16478 states and 16775 transitions. [2021-12-27 22:52:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1736 [2021-12-27 22:52:48,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:48,164 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:48,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 22:52:48,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:48,371 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2130499238, now seen corresponding path program 1 times [2021-12-27 22:52:48,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:48,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071542247] [2021-12-27 22:52:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:48,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5599 backedges. 3316 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-12-27 22:52:48,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:48,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071542247] [2021-12-27 22:52:48,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071542247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:48,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:48,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:48,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106003021] [2021-12-27 22:52:48,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:48,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:48,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:48,811 INFO L87 Difference]: Start difference. First operand 16478 states and 16775 transitions. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:49,640 INFO L93 Difference]: Finished difference Result 34599 states and 35219 transitions. [2021-12-27 22:52:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:49,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 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 1735 [2021-12-27 22:52:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:49,653 INFO L225 Difference]: With dead ends: 34599 [2021-12-27 22:52:49,654 INFO L226 Difference]: Without dead ends: 16478 [2021-12-27 22:52:49,660 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 [2021-12-27 22:52:49,661 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:49,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 413 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:52:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16478 states. [2021-12-27 22:52:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16478 to 15820. [2021-12-27 22:52:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15820 states, 15819 states have (on average 1.016246286111638) internal successors, (16076), 15819 states have internal predecessors, (16076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15820 states to 15820 states and 16076 transitions. [2021-12-27 22:52:49,796 INFO L78 Accepts]: Start accepts. Automaton has 15820 states and 16076 transitions. Word has length 1735 [2021-12-27 22:52:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:49,797 INFO L470 AbstractCegarLoop]: Abstraction has 15820 states and 16076 transitions. [2021-12-27 22:52:49,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 15820 states and 16076 transitions. [2021-12-27 22:52:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1833 [2021-12-27 22:52:49,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:49,818 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:49,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-27 22:52:49,819 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash 203234605, now seen corresponding path program 1 times [2021-12-27 22:52:49,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375434332] [2021-12-27 22:52:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:49,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6641 backedges. 4455 proven. 0 refuted. 0 times theorem prover too weak. 2186 trivial. 0 not checked. [2021-12-27 22:52:50,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:50,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375434332] [2021-12-27 22:52:50,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375434332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:50,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:50,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 22:52:50,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749253381] [2021-12-27 22:52:50,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:50,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 22:52:50,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 22:52:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 22:52:50,333 INFO L87 Difference]: Start difference. First operand 15820 states and 16076 transitions. Second operand has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:51,409 INFO L93 Difference]: Finished difference Result 31671 states and 32186 transitions. [2021-12-27 22:52:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 22:52:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 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 1832 [2021-12-27 22:52:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:51,426 INFO L225 Difference]: With dead ends: 31671 [2021-12-27 22:52:51,426 INFO L226 Difference]: Without dead ends: 16511 [2021-12-27 22:52:51,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:52:51,436 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 602 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:51,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 438 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 22:52:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16511 states. [2021-12-27 22:52:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16511 to 16149. [2021-12-27 22:52:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16149 states, 16148 states have (on average 1.0154198662373048) internal successors, (16397), 16148 states have internal predecessors, (16397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 16397 transitions. [2021-12-27 22:52:51,602 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 16397 transitions. Word has length 1832 [2021-12-27 22:52:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:51,603 INFO L470 AbstractCegarLoop]: Abstraction has 16149 states and 16397 transitions. [2021-12-27 22:52:51,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 16397 transitions. [2021-12-27 22:52:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2010 [2021-12-27 22:52:51,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:51,631 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-27 22:52:51,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-27 22:52:51,631 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1452140993, now seen corresponding path program 1 times [2021-12-27 22:52:51,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:51,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764464691] [2021-12-27 22:52:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:51,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8191 backedges. 1738 proven. 0 refuted. 0 times theorem prover too weak. 6453 trivial. 0 not checked. [2021-12-27 22:52:52,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:52,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764464691] [2021-12-27 22:52:52,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764464691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:52:52,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:52:52,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:52:52,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274434348] [2021-12-27 22:52:52,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:52:52,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:52:52,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:52:52,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:52:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:52:52,417 INFO L87 Difference]: Start difference. First operand 16149 states and 16397 transitions. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:52:53,252 INFO L93 Difference]: Finished difference Result 33965 states and 34494 transitions. [2021-12-27 22:52:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:52:53,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 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 2009 [2021-12-27 22:52:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:52:53,274 INFO L225 Difference]: With dead ends: 33965 [2021-12-27 22:52:53,274 INFO L226 Difference]: Without dead ends: 18476 [2021-12-27 22:52:53,284 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 [2021-12-27 22:52:53,284 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 169 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:52:53,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 46 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-27 22:52:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18476 states. [2021-12-27 22:52:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18476 to 16807. [2021-12-27 22:52:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16807 states, 16806 states have (on average 1.0157086754730453) internal successors, (17070), 16806 states have internal predecessors, (17070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16807 states to 16807 states and 17070 transitions. [2021-12-27 22:52:53,457 INFO L78 Accepts]: Start accepts. Automaton has 16807 states and 17070 transitions. Word has length 2009 [2021-12-27 22:52:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:52:53,458 INFO L470 AbstractCegarLoop]: Abstraction has 16807 states and 17070 transitions. [2021-12-27 22:52:53,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:52:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 16807 states and 17070 transitions. [2021-12-27 22:52:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2076 [2021-12-27 22:52:53,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:52:53,573 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:52:53,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-27 22:52:53,573 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:52:53,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:52:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash 734076612, now seen corresponding path program 1 times [2021-12-27 22:52:53,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:52:53,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493454769] [2021-12-27 22:52:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:53,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:52:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8461 backedges. 5483 proven. 553 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2021-12-27 22:52:54,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:52:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493454769] [2021-12-27 22:52:54,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493454769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:52:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758455336] [2021-12-27 22:52:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:52:54,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:52:54,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:52:54,181 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:52:54,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 22:52:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:52:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:52:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates...