./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_floodmax.5.4.ufo.BOUNDED-10.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 7a3c55a4f8033ed9b3de5a6f415cbc46a326cd545e3ac5e32b7f59b3ce73f2a9 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:57:51,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:57:51,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:57:51,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:57:51,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:57:51,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:57:51,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:57:51,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:57:51,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:57:51,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:57:51,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:57:51,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:57:51,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:57:51,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:57:51,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:57:51,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:57:51,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:57:51,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:57:51,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:57:51,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:57:51,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:57:51,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:57:51,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:57:51,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:57:51,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:57:51,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:57:51,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:57:51,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:57:51,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:57:51,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:57:51,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:57:51,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:57:51,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:57:51,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:57:51,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:57:51,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:57:51,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:57:51,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:57:51,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:57:51,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:57:51,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:57:51,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:57:51,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:57:51,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:57:51,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:57:51,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:57:51,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:57:51,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:57:51,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:57:51,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:57:51,850 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:57:51,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:57:51,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:57:51,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:57:51,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:57:51,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:57:51,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:57:51,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:57:51,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:57:51,852 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:57:51,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:57:51,853 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:57:51,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:57:51,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:57:51,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:57:51,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:57:51,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:57:51,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:57:51,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:57:51,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:57:51,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:57:51,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:57:51,855 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:57:51,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:57:51,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:57:51,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:57:51,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a3c55a4f8033ed9b3de5a6f415cbc46a326cd545e3ac5e32b7f59b3ce73f2a9 [2021-12-14 14:57:52,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:57:52,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:57:52,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:57:52,145 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:57:52,145 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:57:52,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c [2021-12-14 14:57:52,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f70989b/fd43bebec2f5426c90ff3a0a549ff3f9/FLAG7a50dbc79 [2021-12-14 14:57:52,610 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:57:52,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c [2021-12-14 14:57:52,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f70989b/fd43bebec2f5426c90ff3a0a549ff3f9/FLAG7a50dbc79 [2021-12-14 14:57:52,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f70989b/fd43bebec2f5426c90ff3a0a549ff3f9 [2021-12-14 14:57:52,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:57:52,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:57:52,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:57:52,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:57:52,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:57:52,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:57:52" (1/1) ... [2021-12-14 14:57:52,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f5e6a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:52, skipping insertion in model container [2021-12-14 14:57:52,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:57:52" (1/1) ... [2021-12-14 14:57:52,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:57:53,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:57:53,329 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_floodmax.5.4.ufo.BOUNDED-10.pals.c[60917,60930] [2021-12-14 14:57:53,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:57:53,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:57:53,454 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_floodmax.5.4.ufo.BOUNDED-10.pals.c[60917,60930] [2021-12-14 14:57:53,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:57:53,470 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:57:53,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53 WrapperNode [2021-12-14 14:57:53,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:57:53,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:57:53,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:57:53,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:57:53,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,563 INFO L137 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2051 [2021-12-14 14:57:53,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:57:53,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:57:53,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:57:53,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:57:53,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:57:53,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:57:53,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:57:53,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:57:53,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (1/1) ... [2021-12-14 14:57:53,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:57:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:57:53,704 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) [2021-12-14 14:57:53,719 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 [2021-12-14 14:57:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:57:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:57:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:57:53,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:57:53,953 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:57:53,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:57:54,992 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:57:55,002 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:57:55,003 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 14:57:55,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:57:55 BoogieIcfgContainer [2021-12-14 14:57:55,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:57:55,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:57:55,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:57:55,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:57:55,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:57:52" (1/3) ... [2021-12-14 14:57:55,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43dbf1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:57:55, skipping insertion in model container [2021-12-14 14:57:55,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:57:53" (2/3) ... [2021-12-14 14:57:55,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43dbf1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:57:55, skipping insertion in model container [2021-12-14 14:57:55,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:57:55" (3/3) ... [2021-12-14 14:57:55,017 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c [2021-12-14 14:57:55,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:57:55,021 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:57:55,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:57:55,110 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 [2021-12-14 14:57:55,111 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:57:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 706 states, 704 states have (on average 1.8508522727272727) internal successors, (1303), 705 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-14 14:57:55,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:55,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:55,158 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash -745157910, now seen corresponding path program 1 times [2021-12-14 14:57:55,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:55,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274587341] [2021-12-14 14:57:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:55,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:55,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274587341] [2021-12-14 14:57:55,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274587341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:55,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:55,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 14:57:55,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695042979] [2021-12-14 14:57:55,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:55,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 14:57:55,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 14:57:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 14:57:55,597 INFO L87 Difference]: Start difference. First operand has 706 states, 704 states have (on average 1.8508522727272727) internal successors, (1303), 705 states have internal predecessors, (1303), 0 states have call successors, (0), 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 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:55,669 INFO L93 Difference]: Finished difference Result 867 states and 1580 transitions. [2021-12-14 14:57:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 14:57:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-12-14 14:57:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:55,691 INFO L225 Difference]: With dead ends: 867 [2021-12-14 14:57:55,691 INFO L226 Difference]: Without dead ends: 702 [2021-12-14 14:57:55,696 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 [2021-12-14 14:57:55,702 INFO L933 BasicCegarLoop]: 1300 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, 1300 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 [2021-12-14 14:57:55,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-14 14:57:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-12-14 14:57:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.848787446504993) internal successors, (1296), 701 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1296 transitions. [2021-12-14 14:57:55,776 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1296 transitions. Word has length 153 [2021-12-14 14:57:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:55,777 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1296 transitions. [2021-12-14 14:57:55,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1296 transitions. [2021-12-14 14:57:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-14 14:57:55,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:55,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:55,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:57:55,788 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1254631000, now seen corresponding path program 1 times [2021-12-14 14:57:55,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:55,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758309246] [2021-12-14 14:57:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:55,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:55,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:55,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758309246] [2021-12-14 14:57:55,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758309246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:55,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:55,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:57:55,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785675944] [2021-12-14 14:57:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:55,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:57:55,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:57:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:57:55,965 INFO L87 Difference]: Start difference. First operand 702 states and 1296 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:56,083 INFO L93 Difference]: Finished difference Result 862 states and 1570 transitions. [2021-12-14 14:57:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:57:56,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-12-14 14:57:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:56,086 INFO L225 Difference]: With dead ends: 862 [2021-12-14 14:57:56,086 INFO L226 Difference]: Without dead ends: 702 [2021-12-14 14:57:56,087 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 [2021-12-14 14:57:56,089 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 3 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:56,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5113 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:57:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-14 14:57:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-12-14 14:57:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.7631954350927246) internal successors, (1236), 701 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1236 transitions. [2021-12-14 14:57:56,104 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1236 transitions. Word has length 153 [2021-12-14 14:57:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:56,105 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1236 transitions. [2021-12-14 14:57:56,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1236 transitions. [2021-12-14 14:57:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-14 14:57:56,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:56,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:56,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:57:56,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1674803025, now seen corresponding path program 1 times [2021-12-14 14:57:56,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111281755] [2021-12-14 14:57:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:56,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:56,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:56,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111281755] [2021-12-14 14:57:56,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111281755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:56,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:56,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:57:56,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109778236] [2021-12-14 14:57:56,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:56,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:57:56,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:57:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:57:56,210 INFO L87 Difference]: Start difference. First operand 702 states and 1236 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:56,242 INFO L93 Difference]: Finished difference Result 1001 states and 1751 transitions. [2021-12-14 14:57:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:57:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-12-14 14:57:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:56,246 INFO L225 Difference]: With dead ends: 1001 [2021-12-14 14:57:56,246 INFO L226 Difference]: Without dead ends: 845 [2021-12-14 14:57:56,247 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 [2021-12-14 14:57:56,248 INFO L933 BasicCegarLoop]: 1235 mSDtfsCounter, 237 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:56,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2407 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:56,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-14 14:57:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 843. [2021-12-14 14:57:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 1.7517814726840855) internal successors, (1475), 842 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1475 transitions. [2021-12-14 14:57:56,263 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1475 transitions. Word has length 212 [2021-12-14 14:57:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1475 transitions. [2021-12-14 14:57:56,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1475 transitions. [2021-12-14 14:57:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-14 14:57:56,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:56,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:56,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:57:56,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1449767861, now seen corresponding path program 1 times [2021-12-14 14:57:56,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:56,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914451953] [2021-12-14 14:57:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:56,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:56,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914451953] [2021-12-14 14:57:56,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914451953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:56,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:56,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:57:56,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563072190] [2021-12-14 14:57:56,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:56,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:57:56,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:56,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:57:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:57:56,358 INFO L87 Difference]: Start difference. First operand 843 states and 1475 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:56,402 INFO L93 Difference]: Finished difference Result 1415 states and 2451 transitions. [2021-12-14 14:57:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:57:56,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-12-14 14:57:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:56,409 INFO L225 Difference]: With dead ends: 1415 [2021-12-14 14:57:56,409 INFO L226 Difference]: Without dead ends: 1118 [2021-12-14 14:57:56,411 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 [2021-12-14 14:57:56,420 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 237 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:56,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2415 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-12-14 14:57:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1116. [2021-12-14 14:57:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 1.7390134529147983) internal successors, (1939), 1115 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1939 transitions. [2021-12-14 14:57:56,446 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1939 transitions. Word has length 216 [2021-12-14 14:57:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:56,447 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1939 transitions. [2021-12-14 14:57:56,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1939 transitions. [2021-12-14 14:57:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-14 14:57:56,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:56,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:56,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:57:56,450 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1203576295, now seen corresponding path program 1 times [2021-12-14 14:57:56,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:56,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035062907] [2021-12-14 14:57:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:56,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:56,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:56,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035062907] [2021-12-14 14:57:56,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035062907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:56,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:56,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:57:56,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182127016] [2021-12-14 14:57:56,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:57:56,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:57:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:57:56,541 INFO L87 Difference]: Start difference. First operand 1116 states and 1939 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:56,574 INFO L93 Difference]: Finished difference Result 2212 states and 3801 transitions. [2021-12-14 14:57:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:57:56,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-12-14 14:57:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:56,580 INFO L225 Difference]: With dead ends: 2212 [2021-12-14 14:57:56,580 INFO L226 Difference]: Without dead ends: 1642 [2021-12-14 14:57:56,581 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 [2021-12-14 14:57:56,583 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 229 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:56,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 2416 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-12-14 14:57:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2021-12-14 14:57:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.7223917022574742) internal successors, (2823), 1639 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2823 transitions. [2021-12-14 14:57:56,612 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2823 transitions. Word has length 220 [2021-12-14 14:57:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:56,613 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 2823 transitions. [2021-12-14 14:57:56,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2823 transitions. [2021-12-14 14:57:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-14 14:57:56,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:56,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:56,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:57:56,619 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1763181181, now seen corresponding path program 1 times [2021-12-14 14:57:56,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:56,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774888113] [2021-12-14 14:57:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:56,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:56,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:56,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774888113] [2021-12-14 14:57:56,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774888113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:56,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:56,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:57:56,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463050725] [2021-12-14 14:57:56,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:56,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:57:56,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:57:56,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:57:56,756 INFO L87 Difference]: Start difference. First operand 1640 states and 2823 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:56,791 INFO L93 Difference]: Finished difference Result 3740 states and 6369 transitions. [2021-12-14 14:57:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:57:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-12-14 14:57:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:56,801 INFO L225 Difference]: With dead ends: 3740 [2021-12-14 14:57:56,802 INFO L226 Difference]: Without dead ends: 2646 [2021-12-14 14:57:56,804 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 [2021-12-14 14:57:56,805 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 221 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 2417 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:56,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 2417 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-12-14 14:57:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2644. [2021-12-14 14:57:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 1.7037457434733259) internal successors, (4503), 2643 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 4503 transitions. [2021-12-14 14:57:56,864 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 4503 transitions. Word has length 224 [2021-12-14 14:57:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:56,865 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 4503 transitions. [2021-12-14 14:57:56,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 4503 transitions. [2021-12-14 14:57:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-14 14:57:56,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:56,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:56,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:57:56,870 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1428296929, now seen corresponding path program 1 times [2021-12-14 14:57:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678766639] [2021-12-14 14:57:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:56,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:56,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:56,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678766639] [2021-12-14 14:57:56,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678766639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:56,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:56,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:57:56,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091575368] [2021-12-14 14:57:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:56,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:57:56,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:57:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:57:56,954 INFO L87 Difference]: Start difference. First operand 2644 states and 4503 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:57,020 INFO L93 Difference]: Finished difference Result 6664 states and 11241 transitions. [2021-12-14 14:57:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:57:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-12-14 14:57:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:57,034 INFO L225 Difference]: With dead ends: 6664 [2021-12-14 14:57:57,034 INFO L226 Difference]: Without dead ends: 4566 [2021-12-14 14:57:57,037 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 [2021-12-14 14:57:57,038 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 213 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:57,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2418 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2021-12-14 14:57:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4564. [2021-12-14 14:57:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4563 states have (on average 1.6846373000219155) internal successors, (7687), 4563 states have internal predecessors, (7687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 7687 transitions. [2021-12-14 14:57:57,143 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 7687 transitions. Word has length 228 [2021-12-14 14:57:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:57,144 INFO L470 AbstractCegarLoop]: Abstraction has 4564 states and 7687 transitions. [2021-12-14 14:57:57,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 7687 transitions. [2021-12-14 14:57:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-14 14:57:57,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:57,149 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:57,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:57:57,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:57,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1256580795, now seen corresponding path program 1 times [2021-12-14 14:57:57,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:57,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657834338] [2021-12-14 14:57:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:57,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:57,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:57,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657834338] [2021-12-14 14:57:57,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657834338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:57,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:57,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:57:57,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784758874] [2021-12-14 14:57:57,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:57,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:57:57,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:57:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:57:57,286 INFO L87 Difference]: Start difference. First operand 4564 states and 7687 transitions. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:57,752 INFO L93 Difference]: Finished difference Result 27368 states and 46209 transitions. [2021-12-14 14:57:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 14:57:57,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-12-14 14:57:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:57,809 INFO L225 Difference]: With dead ends: 27368 [2021-12-14 14:57:57,809 INFO L226 Difference]: Without dead ends: 23350 [2021-12-14 14:57:57,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:57:57,823 INFO L933 BasicCegarLoop]: 1220 mSDtfsCounter, 4454 mSDsluCounter, 7456 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4454 SdHoareTripleChecker+Valid, 8676 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:57,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4454 Valid, 8676 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:57:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23350 states. [2021-12-14 14:57:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23350 to 8423. [2021-12-14 14:57:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8423 states, 8422 states have (on average 1.678104963191641) internal successors, (14133), 8422 states have internal predecessors, (14133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8423 states to 8423 states and 14133 transitions. [2021-12-14 14:57:58,148 INFO L78 Accepts]: Start accepts. Automaton has 8423 states and 14133 transitions. Word has length 232 [2021-12-14 14:57:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:58,149 INFO L470 AbstractCegarLoop]: Abstraction has 8423 states and 14133 transitions. [2021-12-14 14:57:58,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 8423 states and 14133 transitions. [2021-12-14 14:57:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-14 14:57:58,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:58,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:58,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:57:58,156 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:58,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1967080448, now seen corresponding path program 1 times [2021-12-14 14:57:58,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:58,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549005953] [2021-12-14 14:57:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:58,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:58,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:58,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549005953] [2021-12-14 14:57:58,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549005953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:58,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:58,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:57:58,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143813451] [2021-12-14 14:57:58,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:58,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:57:58,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:57:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:57:58,283 INFO L87 Difference]: Start difference. First operand 8423 states and 14133 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:58,477 INFO L93 Difference]: Finished difference Result 24532 states and 41276 transitions. [2021-12-14 14:57:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:57:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-14 14:57:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:58,513 INFO L225 Difference]: With dead ends: 24532 [2021-12-14 14:57:58,514 INFO L226 Difference]: Without dead ends: 16655 [2021-12-14 14:57:58,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:57:58,531 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 776 mSDsluCounter, 2465 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 3689 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:57:58,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 3689 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-12-14 14:57:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 12506. [2021-12-14 14:57:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.6790083966413434) internal successors, (20996), 12505 states have internal predecessors, (20996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 20996 transitions. [2021-12-14 14:57:58,895 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 20996 transitions. Word has length 233 [2021-12-14 14:57:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:58,896 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 20996 transitions. [2021-12-14 14:57:58,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 20996 transitions. [2021-12-14 14:57:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-14 14:57:58,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:58,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:58,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:57:58,906 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash 159533448, now seen corresponding path program 1 times [2021-12-14 14:57:58,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:58,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804578560] [2021-12-14 14:57:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:58,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:58,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804578560] [2021-12-14 14:57:58,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804578560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:58,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:58,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:57:58,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525291303] [2021-12-14 14:57:58,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:58,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:57:58,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:57:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:57:58,990 INFO L87 Difference]: Start difference. First operand 12506 states and 20996 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:57:59,244 INFO L93 Difference]: Finished difference Result 25097 states and 42142 transitions. [2021-12-14 14:57:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:57:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-14 14:57:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:57:59,281 INFO L225 Difference]: With dead ends: 25097 [2021-12-14 14:57:59,282 INFO L226 Difference]: Without dead ends: 18751 [2021-12-14 14:57:59,296 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 [2021-12-14 14:57:59,297 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 214 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2477 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 [2021-12-14 14:57:59,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 2477 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:57:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18751 states. [2021-12-14 14:57:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18751 to 18749. [2021-12-14 14:57:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18749 states, 18748 states have (on average 1.6717516535097077) internal successors, (31342), 18748 states have internal predecessors, (31342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18749 states to 18749 states and 31342 transitions. [2021-12-14 14:57:59,691 INFO L78 Accepts]: Start accepts. Automaton has 18749 states and 31342 transitions. Word has length 233 [2021-12-14 14:57:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:57:59,692 INFO L470 AbstractCegarLoop]: Abstraction has 18749 states and 31342 transitions. [2021-12-14 14:57:59,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:57:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 18749 states and 31342 transitions. [2021-12-14 14:57:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-14 14:57:59,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:57:59,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:57:59,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:57:59,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:57:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:57:59,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2066182408, now seen corresponding path program 1 times [2021-12-14 14:57:59,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:57:59,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499684292] [2021-12-14 14:57:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:57:59,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:57:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:57:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:57:59,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:57:59,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499684292] [2021-12-14 14:57:59,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499684292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:57:59,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:57:59,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:57:59,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220721600] [2021-12-14 14:57:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:57:59,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:57:59,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:57:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:57:59,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:57:59,767 INFO L87 Difference]: Start difference. First operand 18749 states and 31342 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:00,090 INFO L93 Difference]: Finished difference Result 35049 states and 58656 transitions. [2021-12-14 14:58:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-14 14:58:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:00,143 INFO L225 Difference]: With dead ends: 35049 [2021-12-14 14:58:00,144 INFO L226 Difference]: Without dead ends: 25707 [2021-12-14 14:58:00,157 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 [2021-12-14 14:58:00,158 INFO L933 BasicCegarLoop]: 1320 mSDtfsCounter, 222 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 2522 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 [2021-12-14 14:58:00,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 2522 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25707 states. [2021-12-14 14:58:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25707 to 25705. [2021-12-14 14:58:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25705 states, 25704 states have (on average 1.6654217242452536) internal successors, (42808), 25704 states have internal predecessors, (42808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25705 states to 25705 states and 42808 transitions. [2021-12-14 14:58:00,741 INFO L78 Accepts]: Start accepts. Automaton has 25705 states and 42808 transitions. Word has length 233 [2021-12-14 14:58:00,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:00,742 INFO L470 AbstractCegarLoop]: Abstraction has 25705 states and 42808 transitions. [2021-12-14 14:58:00,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 25705 states and 42808 transitions. [2021-12-14 14:58:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-14 14:58:00,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:00,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:00,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:58:00,747 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 116201608, now seen corresponding path program 1 times [2021-12-14 14:58:00,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:00,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214460385] [2021-12-14 14:58:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:00,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:00,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214460385] [2021-12-14 14:58:00,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214460385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:00,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:00,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:00,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166840299] [2021-12-14 14:58:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:00,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:00,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:00,850 INFO L87 Difference]: Start difference. First operand 25705 states and 42808 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:01,477 INFO L93 Difference]: Finished difference Result 48749 states and 81330 transitions. [2021-12-14 14:58:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:01,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-14 14:58:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:01,545 INFO L225 Difference]: With dead ends: 48749 [2021-12-14 14:58:01,545 INFO L226 Difference]: Without dead ends: 35549 [2021-12-14 14:58:01,566 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 [2021-12-14 14:58:01,567 INFO L933 BasicCegarLoop]: 1366 mSDtfsCounter, 230 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2567 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 [2021-12-14 14:58:01,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2567 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35549 states. [2021-12-14 14:58:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35549 to 35547. [2021-12-14 14:58:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35547 states, 35546 states have (on average 1.6612277049457043) internal successors, (59050), 35546 states have internal predecessors, (59050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35547 states to 35547 states and 59050 transitions. [2021-12-14 14:58:02,247 INFO L78 Accepts]: Start accepts. Automaton has 35547 states and 59050 transitions. Word has length 233 [2021-12-14 14:58:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:02,248 INFO L470 AbstractCegarLoop]: Abstraction has 35547 states and 59050 transitions. [2021-12-14 14:58:02,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 35547 states and 59050 transitions. [2021-12-14 14:58:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-14 14:58:02,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:02,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:02,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 14:58:02,253 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1001177080, now seen corresponding path program 1 times [2021-12-14 14:58:02,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:02,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541382544] [2021-12-14 14:58:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:02,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:02,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541382544] [2021-12-14 14:58:02,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541382544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:02,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:02,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:02,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671617030] [2021-12-14 14:58:02,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:02,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:02,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:02,338 INFO L87 Difference]: Start difference. First operand 35547 states and 59050 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:03,088 INFO L93 Difference]: Finished difference Result 68005 states and 113160 transitions. [2021-12-14 14:58:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-14 14:58:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:03,180 INFO L225 Difference]: With dead ends: 68005 [2021-12-14 14:58:03,181 INFO L226 Difference]: Without dead ends: 49501 [2021-12-14 14:58:03,206 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 [2021-12-14 14:58:03,207 INFO L933 BasicCegarLoop]: 1412 mSDtfsCounter, 238 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2612 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 [2021-12-14 14:58:03,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 2612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49501 states. [2021-12-14 14:58:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49501 to 49499. [2021-12-14 14:58:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49499 states, 49498 states have (on average 1.6563901571780677) internal successors, (81988), 49498 states have internal predecessors, (81988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49499 states to 49499 states and 81988 transitions. [2021-12-14 14:58:04,259 INFO L78 Accepts]: Start accepts. Automaton has 49499 states and 81988 transitions. Word has length 233 [2021-12-14 14:58:04,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:04,260 INFO L470 AbstractCegarLoop]: Abstraction has 49499 states and 81988 transitions. [2021-12-14 14:58:04,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 49499 states and 81988 transitions. [2021-12-14 14:58:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-14 14:58:04,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:04,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:04,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 14:58:04,264 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1255794568, now seen corresponding path program 1 times [2021-12-14 14:58:04,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728973911] [2021-12-14 14:58:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:04,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:04,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:04,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728973911] [2021-12-14 14:58:04,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728973911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:04,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:04,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:04,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53629127] [2021-12-14 14:58:04,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:04,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:04,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:04,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:04,337 INFO L87 Difference]: Start difference. First operand 49499 states and 81988 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:05,328 INFO L93 Difference]: Finished difference Result 109735 states and 182548 transitions. [2021-12-14 14:58:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-14 14:58:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:05,461 INFO L225 Difference]: With dead ends: 109735 [2021-12-14 14:58:05,461 INFO L226 Difference]: Without dead ends: 75497 [2021-12-14 14:58:05,500 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 [2021-12-14 14:58:05,501 INFO L933 BasicCegarLoop]: 1449 mSDtfsCounter, 246 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2648 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 [2021-12-14 14:58:05,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 2648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75497 states. [2021-12-14 14:58:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75497 to 75495. [2021-12-14 14:58:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75495 states, 75494 states have (on average 1.6524889395183724) internal successors, (124753), 75494 states have internal predecessors, (124753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75495 states to 75495 states and 124753 transitions. [2021-12-14 14:58:07,200 INFO L78 Accepts]: Start accepts. Automaton has 75495 states and 124753 transitions. Word has length 233 [2021-12-14 14:58:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:07,200 INFO L470 AbstractCegarLoop]: Abstraction has 75495 states and 124753 transitions. [2021-12-14 14:58:07,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 75495 states and 124753 transitions. [2021-12-14 14:58:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-14 14:58:07,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:07,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:07,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 14:58:07,203 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1347640466, now seen corresponding path program 1 times [2021-12-14 14:58:07,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:07,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196434921] [2021-12-14 14:58:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:07,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:07,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:07,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196434921] [2021-12-14 14:58:07,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196434921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:07,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:07,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:58:07,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546839426] [2021-12-14 14:58:07,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:07,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:58:07,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:58:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:58:07,289 INFO L87 Difference]: Start difference. First operand 75495 states and 124753 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:09,735 INFO L93 Difference]: Finished difference Result 248936 states and 411966 transitions. [2021-12-14 14:58:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:58:09,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 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 234 [2021-12-14 14:58:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:10,077 INFO L225 Difference]: With dead ends: 248936 [2021-12-14 14:58:10,077 INFO L226 Difference]: Without dead ends: 174053 [2021-12-14 14:58:10,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:10,137 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 774 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 3737 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:10,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 3737 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174053 states. [2021-12-14 14:58:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174053 to 124505. [2021-12-14 14:58:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124505 states, 124504 states have (on average 1.6479711495213005) internal successors, (205179), 124504 states have internal predecessors, (205179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124505 states to 124505 states and 205179 transitions. [2021-12-14 14:58:13,552 INFO L78 Accepts]: Start accepts. Automaton has 124505 states and 205179 transitions. Word has length 234 [2021-12-14 14:58:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:13,553 INFO L470 AbstractCegarLoop]: Abstraction has 124505 states and 205179 transitions. [2021-12-14 14:58:13,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 124505 states and 205179 transitions. [2021-12-14 14:58:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-14 14:58:13,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:13,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:13,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 14:58:13,555 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1193778039, now seen corresponding path program 1 times [2021-12-14 14:58:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671971373] [2021-12-14 14:58:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:13,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:13,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671971373] [2021-12-14 14:58:13,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671971373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:13,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:13,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:58:13,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807257087] [2021-12-14 14:58:13,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:13,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:58:13,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:58:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:58:13,639 INFO L87 Difference]: Start difference. First operand 124505 states and 205179 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 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) [2021-12-14 14:58:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:17,479 INFO L93 Difference]: Finished difference Result 410480 states and 677550 transitions. [2021-12-14 14:58:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:58:17,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 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 235 [2021-12-14 14:58:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:18,120 INFO L225 Difference]: With dead ends: 410480 [2021-12-14 14:58:18,125 INFO L226 Difference]: Without dead ends: 286587 [2021-12-14 14:58:18,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:18,511 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 772 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:18,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 3785 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286587 states. [2021-12-14 14:58:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286587 to 205103. [2021-12-14 14:58:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205103 states, 205102 states have (on average 1.6435773420054411) internal successors, (337101), 205102 states have internal predecessors, (337101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205103 states to 205103 states and 337101 transitions. [2021-12-14 14:58:23,908 INFO L78 Accepts]: Start accepts. Automaton has 205103 states and 337101 transitions. Word has length 235 [2021-12-14 14:58:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:23,909 INFO L470 AbstractCegarLoop]: Abstraction has 205103 states and 337101 transitions. [2021-12-14 14:58:23,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 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) [2021-12-14 14:58:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 205103 states and 337101 transitions. [2021-12-14 14:58:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-14 14:58:23,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:23,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 14:58:23,928 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash 888014441, now seen corresponding path program 1 times [2021-12-14 14:58:23,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:23,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936644960] [2021-12-14 14:58:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:23,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:23,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936644960] [2021-12-14 14:58:23,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936644960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:23,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:23,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:58:23,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154442750] [2021-12-14 14:58:23,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:23,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:58:23,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:58:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:58:23,998 INFO L87 Difference]: Start difference. First operand 205103 states and 337101 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:30,955 INFO L93 Difference]: Finished difference Result 674216 states and 1110038 transitions. [2021-12-14 14:58:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:58:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 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 236 [2021-12-14 14:58:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:32,248 INFO L225 Difference]: With dead ends: 674216 [2021-12-14 14:58:32,248 INFO L226 Difference]: Without dead ends: 469725 [2021-12-14 14:58:32,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:32,574 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 770 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:32,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 3833 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469725 states.