./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.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 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:15:26,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:15:26,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:15:26,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:15:26,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:15:26,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:15:26,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:15:26,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:15:26,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:15:26,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:15:26,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:15:26,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:15:26,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:15:26,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:15:26,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:15:26,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:15:26,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:15:26,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:15:26,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:15:26,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:15:26,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:15:26,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:15:26,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:15:26,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:15:26,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:15:26,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:15:26,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:15:26,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:15:26,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:15:26,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:15:26,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:15:26,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:15:26,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:15:26,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:15:26,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:15:26,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:15:26,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:15:26,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:15:26,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:15:26,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:15:26,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:15:26,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:15:26,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:15:26,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:15:26,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:15:26,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:15:26,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:15:26,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:15:26,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:15:26,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:15:26,786 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:15:26,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:15:26,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:15:26,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:15:26,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:15:26,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:15:26,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:15:26,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:15:26,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:15:26,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:15:26,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:15:26,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:15:26,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:15:26,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:15:26,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:15:26,797 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:15:26,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:15:26,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:15:26,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:15:26,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc [2021-12-15 11:15:26,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:15:27,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:15:27,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:15:27,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:15:27,028 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:15:27,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2021-12-15 11:15:27,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4bbef3ec/24c70481257e4b018e686d2438f249ee/FLAGf72611638 [2021-12-15 11:15:27,529 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:15:27,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2021-12-15 11:15:27,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4bbef3ec/24c70481257e4b018e686d2438f249ee/FLAGf72611638 [2021-12-15 11:15:27,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4bbef3ec/24c70481257e4b018e686d2438f249ee [2021-12-15 11:15:27,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:15:27,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:15:27,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:15:27,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:15:27,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:15:27,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405ecd02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27, skipping insertion in model container [2021-12-15 11:15:27,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:15:27,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:15:27,733 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/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2021-12-15 11:15:27,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:15:27,742 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:15:27,779 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/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2021-12-15 11:15:27,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:15:27,790 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:15:27,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27 WrapperNode [2021-12-15 11:15:27,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:15:27,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:15:27,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:15:27,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:15:27,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,830 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 313 [2021-12-15 11:15:27,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:15:27,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:15:27,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:15:27,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:15:27,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:15:27,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:15:27,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:15:27,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:15:27,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (1/1) ... [2021-12-15 11:15:27,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:15:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:15:27,915 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) [2021-12-15 11:15:27,924 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 [2021-12-15 11:15:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:15:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:15:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:15:27,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:15:28,010 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:15:28,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:15:28,352 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:15:28,360 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:15:28,360 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:15:28,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:28 BoogieIcfgContainer [2021-12-15 11:15:28,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:15:28,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:15:28,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:15:28,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:15:28,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:15:27" (1/3) ... [2021-12-15 11:15:28,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5c2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:28, skipping insertion in model container [2021-12-15 11:15:28,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:27" (2/3) ... [2021-12-15 11:15:28,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5c2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:28, skipping insertion in model container [2021-12-15 11:15:28,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:28" (3/3) ... [2021-12-15 11:15:28,369 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2021-12-15 11:15:28,374 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:15:28,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:15:28,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:15:28,419 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 [2021-12-15 11:15:28,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:15:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 98 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 11:15:28,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:28,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:28,451 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:28,462 INFO L85 PathProgramCache]: Analyzing trace with hash -107778019, now seen corresponding path program 1 times [2021-12-15 11:15:28,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971221584] [2021-12-15 11:15:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:28,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:28,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:28,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971221584] [2021-12-15 11:15:28,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971221584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:28,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:28,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:15:28,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450363247] [2021-12-15 11:15:28,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:28,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:15:28,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:28,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:15:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:15:28,710 INFO L87 Difference]: Start difference. First operand has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 98 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:28,748 INFO L93 Difference]: Finished difference Result 165 states and 271 transitions. [2021-12-15 11:15:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:15:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-15 11:15:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:28,758 INFO L225 Difference]: With dead ends: 165 [2021-12-15 11:15:28,758 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 11:15:28,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:15:28,767 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:28,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 11:15:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-15 11:15:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6702127659574468) internal successors, (157), 94 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions. [2021-12-15 11:15:28,806 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 29 [2021-12-15 11:15:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:28,806 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 157 transitions. [2021-12-15 11:15:28,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions. [2021-12-15 11:15:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 11:15:28,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:28,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:28,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:15:28,811 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:28,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash -241791525, now seen corresponding path program 1 times [2021-12-15 11:15:28,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:28,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049749800] [2021-12-15 11:15:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:28,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:28,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:28,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049749800] [2021-12-15 11:15:28,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049749800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:28,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:28,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:15:28,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804671732] [2021-12-15 11:15:28,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:28,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:15:28,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:15:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:15:28,984 INFO L87 Difference]: Start difference. First operand 95 states and 157 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:29,054 INFO L93 Difference]: Finished difference Result 164 states and 264 transitions. [2021-12-15 11:15:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:15:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-15 11:15:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:29,058 INFO L225 Difference]: With dead ends: 164 [2021-12-15 11:15:29,058 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 11:15:29,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:15:29,059 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 3 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:29,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 593 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 11:15:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-15 11:15:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 94 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2021-12-15 11:15:29,067 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 29 [2021-12-15 11:15:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:29,068 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2021-12-15 11:15:29,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2021-12-15 11:15:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 11:15:29,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:29,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:29,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:15:29,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash 747245012, now seen corresponding path program 1 times [2021-12-15 11:15:29,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:29,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389322158] [2021-12-15 11:15:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:29,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:29,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389322158] [2021-12-15 11:15:29,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389322158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:29,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:29,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:29,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140448532] [2021-12-15 11:15:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:29,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:29,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:29,152 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:29,190 INFO L93 Difference]: Finished difference Result 213 states and 319 transitions. [2021-12-15 11:15:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:29,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-15 11:15:29,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:29,192 INFO L225 Difference]: With dead ends: 213 [2021-12-15 11:15:29,192 INFO L226 Difference]: Without dead ends: 148 [2021-12-15 11:15:29,193 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 [2021-12-15 11:15:29,194 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 87 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:29,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 289 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-15 11:15:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2021-12-15 11:15:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4758620689655173) internal successors, (214), 145 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 214 transitions. [2021-12-15 11:15:29,211 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 214 transitions. Word has length 52 [2021-12-15 11:15:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:29,212 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 214 transitions. [2021-12-15 11:15:29,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 214 transitions. [2021-12-15 11:15:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 11:15:29,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:29,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:29,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:15:29,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash 396878357, now seen corresponding path program 1 times [2021-12-15 11:15:29,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:29,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066070241] [2021-12-15 11:15:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:29,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:29,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066070241] [2021-12-15 11:15:29,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066070241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:29,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:29,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:29,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113750906] [2021-12-15 11:15:29,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:29,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:29,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:29,284 INFO L87 Difference]: Start difference. First operand 146 states and 214 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:29,310 INFO L93 Difference]: Finished difference Result 354 states and 542 transitions. [2021-12-15 11:15:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-15 11:15:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:29,329 INFO L225 Difference]: With dead ends: 354 [2021-12-15 11:15:29,329 INFO L226 Difference]: Without dead ends: 238 [2021-12-15 11:15:29,330 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 [2021-12-15 11:15:29,331 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 82 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:29,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 280 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-15 11:15:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2021-12-15 11:15:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5106382978723405) internal successors, (355), 235 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) [2021-12-15 11:15:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 355 transitions. [2021-12-15 11:15:29,351 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 355 transitions. Word has length 53 [2021-12-15 11:15:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:29,351 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 355 transitions. [2021-12-15 11:15:29,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 355 transitions. [2021-12-15 11:15:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 11:15:29,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:29,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:29,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:15:29,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash -778312060, now seen corresponding path program 1 times [2021-12-15 11:15:29,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:29,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167986053] [2021-12-15 11:15:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:29,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:29,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:29,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167986053] [2021-12-15 11:15:29,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167986053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:29,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:29,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:29,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320053699] [2021-12-15 11:15:29,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:29,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:29,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:29,426 INFO L87 Difference]: Start difference. First operand 236 states and 355 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:29,444 INFO L93 Difference]: Finished difference Result 600 states and 925 transitions. [2021-12-15 11:15:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 11:15:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:29,460 INFO L225 Difference]: With dead ends: 600 [2021-12-15 11:15:29,460 INFO L226 Difference]: Without dead ends: 394 [2021-12-15 11:15:29,461 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 [2021-12-15 11:15:29,462 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 77 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:29,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-15 11:15:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2021-12-15 11:15:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.5217391304347827) internal successors, (595), 391 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 595 transitions. [2021-12-15 11:15:29,488 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 595 transitions. Word has length 54 [2021-12-15 11:15:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:29,489 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 595 transitions. [2021-12-15 11:15:29,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 595 transitions. [2021-12-15 11:15:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 11:15:29,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:29,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:29,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:15:29,490 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1214154885, now seen corresponding path program 1 times [2021-12-15 11:15:29,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:29,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999271876] [2021-12-15 11:15:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:29,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:29,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999271876] [2021-12-15 11:15:29,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999271876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:29,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:29,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:29,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614848422] [2021-12-15 11:15:29,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:29,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:29,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:29,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:29,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:29,553 INFO L87 Difference]: Start difference. First operand 392 states and 595 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:29,693 INFO L93 Difference]: Finished difference Result 2202 states and 3420 transitions. [2021-12-15 11:15:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 11:15:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:29,701 INFO L225 Difference]: With dead ends: 2202 [2021-12-15 11:15:29,701 INFO L226 Difference]: Without dead ends: 1840 [2021-12-15 11:15:29,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:15:29,706 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 746 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:29,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1037 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:15:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-12-15 11:15:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 752. [2021-12-15 11:15:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 1.521970705725699) internal successors, (1143), 751 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1143 transitions. [2021-12-15 11:15:29,744 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1143 transitions. Word has length 55 [2021-12-15 11:15:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:29,744 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1143 transitions. [2021-12-15 11:15:29,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1143 transitions. [2021-12-15 11:15:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 11:15:29,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:29,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:29,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:15:29,749 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1399227554, now seen corresponding path program 1 times [2021-12-15 11:15:29,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:29,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35023977] [2021-12-15 11:15:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:29,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:29,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:29,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35023977] [2021-12-15 11:15:29,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35023977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:29,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:29,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:29,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697124855] [2021-12-15 11:15:29,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:29,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:29,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:29,828 INFO L87 Difference]: Start difference. First operand 752 states and 1143 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:29,948 INFO L93 Difference]: Finished difference Result 3376 states and 5139 transitions. [2021-12-15 11:15:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-15 11:15:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:29,957 INFO L225 Difference]: With dead ends: 3376 [2021-12-15 11:15:29,958 INFO L226 Difference]: Without dead ends: 2654 [2021-12-15 11:15:29,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:29,960 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 345 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:29,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 528 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:15:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-12-15 11:15:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2648. [2021-12-15 11:15:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 1.5137891953154514) internal successors, (4007), 2647 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4007 transitions. [2021-12-15 11:15:30,035 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4007 transitions. Word has length 56 [2021-12-15 11:15:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,036 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 4007 transitions. [2021-12-15 11:15:30,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4007 transitions. [2021-12-15 11:15:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 11:15:30,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:15:30,038 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1806755418, now seen corresponding path program 1 times [2021-12-15 11:15:30,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593213164] [2021-12-15 11:15:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593213164] [2021-12-15 11:15:30,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593213164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:15:30,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85753814] [2021-12-15 11:15:30,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:15:30,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:15:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:15:30,120 INFO L87 Difference]: Start difference. First operand 2648 states and 4007 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,266 INFO L93 Difference]: Finished difference Result 5522 states and 8240 transitions. [2021-12-15 11:15:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:15:30,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 11:15:30,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,282 INFO L225 Difference]: With dead ends: 5522 [2021-12-15 11:15:30,283 INFO L226 Difference]: Without dead ends: 5520 [2021-12-15 11:15:30,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:15:30,285 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 288 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:30,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 592 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2021-12-15 11:15:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 2840. [2021-12-15 11:15:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4790419161676647) internal successors, (4199), 2839 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4199 transitions. [2021-12-15 11:15:30,398 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4199 transitions. Word has length 57 [2021-12-15 11:15:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,399 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4199 transitions. [2021-12-15 11:15:30,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4199 transitions. [2021-12-15 11:15:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 11:15:30,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:15:30,400 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 227421697, now seen corresponding path program 1 times [2021-12-15 11:15:30,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822921646] [2021-12-15 11:15:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822921646] [2021-12-15 11:15:30,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822921646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:30,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480352210] [2021-12-15 11:15:30,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:30,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,444 INFO L87 Difference]: Start difference. First operand 2840 states and 4199 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,555 INFO L93 Difference]: Finished difference Result 7692 states and 11321 transitions. [2021-12-15 11:15:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:30,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-15 11:15:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,568 INFO L225 Difference]: With dead ends: 7692 [2021-12-15 11:15:30,568 INFO L226 Difference]: Without dead ends: 4882 [2021-12-15 11:15:30,571 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 [2021-12-15 11:15:30,573 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 67 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:30,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 231 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-12-15 11:15:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 4824. [2021-12-15 11:15:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4823 states have (on average 1.4478540327596932) internal successors, (6983), 4823 states have internal predecessors, (6983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 6983 transitions. [2021-12-15 11:15:30,742 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 6983 transitions. Word has length 58 [2021-12-15 11:15:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,742 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 6983 transitions. [2021-12-15 11:15:30,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 6983 transitions. [2021-12-15 11:15:30,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 11:15:30,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:15:30,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2122531684, now seen corresponding path program 1 times [2021-12-15 11:15:30,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207204442] [2021-12-15 11:15:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207204442] [2021-12-15 11:15:30,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207204442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:30,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734686167] [2021-12-15 11:15:30,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:30,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,776 INFO L87 Difference]: Start difference. First operand 4824 states and 6983 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,920 INFO L93 Difference]: Finished difference Result 9743 states and 14173 transitions. [2021-12-15 11:15:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-15 11:15:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,940 INFO L225 Difference]: With dead ends: 9743 [2021-12-15 11:15:30,941 INFO L226 Difference]: Without dead ends: 6932 [2021-12-15 11:15:30,945 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 [2021-12-15 11:15:30,946 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 88 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:30,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 310 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2021-12-15 11:15:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6930. [2021-12-15 11:15:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 1.4341174772694472) internal successors, (9937), 6929 states have internal predecessors, (9937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 9937 transitions. [2021-12-15 11:15:31,183 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 9937 transitions. Word has length 59 [2021-12-15 11:15:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:31,183 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 9937 transitions. [2021-12-15 11:15:31,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 9937 transitions. [2021-12-15 11:15:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 11:15:31,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:31,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:31,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:15:31,188 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:31,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1504297558, now seen corresponding path program 1 times [2021-12-15 11:15:31,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:31,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219534648] [2021-12-15 11:15:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:31,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:31,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:31,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219534648] [2021-12-15 11:15:31,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219534648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:31,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:31,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:31,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376547963] [2021-12-15 11:15:31,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:31,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:31,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:31,219 INFO L87 Difference]: Start difference. First operand 6930 states and 9937 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:31,448 INFO L93 Difference]: Finished difference Result 16593 states and 23741 transitions. [2021-12-15 11:15:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-15 11:15:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:31,481 INFO L225 Difference]: With dead ends: 16593 [2021-12-15 11:15:31,482 INFO L226 Difference]: Without dead ends: 11119 [2021-12-15 11:15:31,486 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 [2021-12-15 11:15:31,487 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 66 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:31,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 263 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-12-15 11:15:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 10545. [2021-12-15 11:15:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10545 states, 10544 states have (on average 1.4164453717754173) internal successors, (14935), 10544 states have internal predecessors, (14935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10545 states to 10545 states and 14935 transitions. [2021-12-15 11:15:31,823 INFO L78 Accepts]: Start accepts. Automaton has 10545 states and 14935 transitions. Word has length 82 [2021-12-15 11:15:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:31,823 INFO L470 AbstractCegarLoop]: Abstraction has 10545 states and 14935 transitions. [2021-12-15 11:15:31,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 10545 states and 14935 transitions. [2021-12-15 11:15:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 11:15:31,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:31,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:31,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:15:31,834 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1310211642, now seen corresponding path program 1 times [2021-12-15 11:15:31,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:31,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684818552] [2021-12-15 11:15:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:31,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:15:31,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684818552] [2021-12-15 11:15:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684818552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:31,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:31,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:31,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070044213] [2021-12-15 11:15:31,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:31,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:31,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:31,902 INFO L87 Difference]: Start difference. First operand 10545 states and 14935 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:32,344 INFO L93 Difference]: Finished difference Result 22607 states and 32332 transitions. [2021-12-15 11:15:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:32,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 11:15:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:32,379 INFO L225 Difference]: With dead ends: 22607 [2021-12-15 11:15:32,380 INFO L226 Difference]: Without dead ends: 18981 [2021-12-15 11:15:32,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:15:32,388 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 635 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:32,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 742 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18981 states. [2021-12-15 11:15:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18981 to 14073. [2021-12-15 11:15:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14073 states, 14072 states have (on average 1.415505969300739) internal successors, (19919), 14072 states have internal predecessors, (19919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14073 states to 14073 states and 19919 transitions. [2021-12-15 11:15:32,829 INFO L78 Accepts]: Start accepts. Automaton has 14073 states and 19919 transitions. Word has length 82 [2021-12-15 11:15:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:32,829 INFO L470 AbstractCegarLoop]: Abstraction has 14073 states and 19919 transitions. [2021-12-15 11:15:32,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 14073 states and 19919 transitions. [2021-12-15 11:15:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 11:15:32,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:32,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:32,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:15:32,836 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1737557706, now seen corresponding path program 1 times [2021-12-15 11:15:32,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:32,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955929912] [2021-12-15 11:15:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:32,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:32,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:32,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955929912] [2021-12-15 11:15:32,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955929912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:32,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:32,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:32,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005591692] [2021-12-15 11:15:32,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:32,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:32,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:32,865 INFO L87 Difference]: Start difference. First operand 14073 states and 19919 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:33,187 INFO L93 Difference]: Finished difference Result 22641 states and 31918 transitions. [2021-12-15 11:15:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-15 11:15:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:33,213 INFO L225 Difference]: With dead ends: 22641 [2021-12-15 11:15:33,213 INFO L226 Difference]: Without dead ends: 14865 [2021-12-15 11:15:33,223 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 [2021-12-15 11:15:33,223 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 69 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:33,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 292 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:33,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14865 states. [2021-12-15 11:15:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14865 to 14161. [2021-12-15 11:15:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14161 states, 14160 states have (on average 1.3921610169491525) internal successors, (19713), 14160 states have internal predecessors, (19713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14161 states to 14161 states and 19713 transitions. [2021-12-15 11:15:33,647 INFO L78 Accepts]: Start accepts. Automaton has 14161 states and 19713 transitions. Word has length 82 [2021-12-15 11:15:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:33,648 INFO L470 AbstractCegarLoop]: Abstraction has 14161 states and 19713 transitions. [2021-12-15 11:15:33,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14161 states and 19713 transitions. [2021-12-15 11:15:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 11:15:33,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:33,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:33,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:15:33,654 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:33,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash 54798832, now seen corresponding path program 1 times [2021-12-15 11:15:33,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:33,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527053650] [2021-12-15 11:15:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:33,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 11:15:33,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527053650] [2021-12-15 11:15:33,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527053650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:33,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:33,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:33,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753598747] [2021-12-15 11:15:33,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:33,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:33,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:33,700 INFO L87 Difference]: Start difference. First operand 14161 states and 19713 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:34,270 INFO L93 Difference]: Finished difference Result 22780 states and 32064 transitions. [2021-12-15 11:15:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 11:15:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:34,302 INFO L225 Difference]: With dead ends: 22780 [2021-12-15 11:15:34,302 INFO L226 Difference]: Without dead ends: 20918 [2021-12-15 11:15:34,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:15:34,307 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 627 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:34,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 763 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20918 states. [2021-12-15 11:15:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20918 to 15973. [2021-12-15 11:15:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15973 states, 15972 states have (on average 1.3940020035061358) internal successors, (22265), 15972 states have internal predecessors, (22265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15973 states to 15973 states and 22265 transitions. [2021-12-15 11:15:34,694 INFO L78 Accepts]: Start accepts. Automaton has 15973 states and 22265 transitions. Word has length 82 [2021-12-15 11:15:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:34,695 INFO L470 AbstractCegarLoop]: Abstraction has 15973 states and 22265 transitions. [2021-12-15 11:15:34,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 15973 states and 22265 transitions. [2021-12-15 11:15:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 11:15:34,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:34,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:34,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:15:34,700 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash -273458928, now seen corresponding path program 1 times [2021-12-15 11:15:34,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:34,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103547911] [2021-12-15 11:15:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:34,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 11:15:34,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103547911] [2021-12-15 11:15:34,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103547911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:34,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:34,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:34,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721951674] [2021-12-15 11:15:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:34,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:34,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:34,744 INFO L87 Difference]: Start difference. First operand 15973 states and 22265 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:35,329 INFO L93 Difference]: Finished difference Result 28973 states and 40771 transitions. [2021-12-15 11:15:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 82 [2021-12-15 11:15:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:35,365 INFO L225 Difference]: With dead ends: 28973 [2021-12-15 11:15:35,365 INFO L226 Difference]: Without dead ends: 24433 [2021-12-15 11:15:35,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:15:35,378 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 589 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:35,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 845 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24433 states. [2021-12-15 11:15:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24433 to 20069. [2021-12-15 11:15:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20069 states, 20068 states have (on average 1.393711381303568) internal successors, (27969), 20068 states have internal predecessors, (27969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20069 states to 20069 states and 27969 transitions. [2021-12-15 11:15:35,899 INFO L78 Accepts]: Start accepts. Automaton has 20069 states and 27969 transitions. Word has length 82 [2021-12-15 11:15:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:35,900 INFO L470 AbstractCegarLoop]: Abstraction has 20069 states and 27969 transitions. [2021-12-15 11:15:35,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20069 states and 27969 transitions. [2021-12-15 11:15:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 11:15:35,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:35,905 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:15:35,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:15:35,906 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash -90302852, now seen corresponding path program 1 times [2021-12-15 11:15:35,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:35,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042944154] [2021-12-15 11:15:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:35,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:36,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:36,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042944154] [2021-12-15 11:15:36,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042944154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:15:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582135143] [2021-12-15 11:15:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:36,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:15:36,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:15:36,053 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) [2021-12-15 11:15:36,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 11:15:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 11:15:36,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:15:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:15:36,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:15:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:15:36,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582135143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:15:36,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:15:36,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-15 11:15:36,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060405569] [2021-12-15 11:15:36,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:15:36,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 11:15:36,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 11:15:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-15 11:15:36,767 INFO L87 Difference]: Start difference. First operand 20069 states and 27969 transitions. Second operand has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:46,927 INFO L93 Difference]: Finished difference Result 248164 states and 344247 transitions. [2021-12-15 11:15:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-15 11:15:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 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 83 [2021-12-15 11:15:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:47,389 INFO L225 Difference]: With dead ends: 248164 [2021-12-15 11:15:47,389 INFO L226 Difference]: Without dead ends: 228820 [2021-12-15 11:15:47,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1857, Invalid=7455, Unknown=0, NotChecked=0, Total=9312 [2021-12-15 11:15:47,548 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 6684 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6684 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:47,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6684 Valid, 2641 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 11:15:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228820 states. [2021-12-15 11:15:52,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228820 to 136796. [2021-12-15 11:15:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136796 states, 136795 states have (on average 1.3697649767900875) internal successors, (187377), 136795 states have internal predecessors, (187377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136796 states to 136796 states and 187377 transitions. [2021-12-15 11:15:53,076 INFO L78 Accepts]: Start accepts. Automaton has 136796 states and 187377 transitions. Word has length 83 [2021-12-15 11:15:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:53,076 INFO L470 AbstractCegarLoop]: Abstraction has 136796 states and 187377 transitions. [2021-12-15 11:15:53,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 136796 states and 187377 transitions. [2021-12-15 11:15:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 11:15:53,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:53,085 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:15:53,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 11:15:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 11:15:53,298 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash 147462531, now seen corresponding path program 1 times [2021-12-15 11:15:53,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:53,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573947030] [2021-12-15 11:15:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:53,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:53,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573947030] [2021-12-15 11:15:53,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573947030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:53,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:53,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:53,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512899559] [2021-12-15 11:15:53,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:53,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:53,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:53,346 INFO L87 Difference]: Start difference. First operand 136796 states and 187377 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:01,569 INFO L93 Difference]: Finished difference Result 382129 states and 521199 transitions. [2021-12-15 11:16:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:01,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-15 11:16:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:02,070 INFO L225 Difference]: With dead ends: 382129 [2021-12-15 11:16:02,070 INFO L226 Difference]: Without dead ends: 255912 [2021-12-15 11:16:02,373 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 [2021-12-15 11:16:02,377 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 64 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:02,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 260 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255912 states.