./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.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 252cd4a0f8e1adbe16c63dba2a525d461eb83ddbfd931d93e6b7ef83b52daaf7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:15:05,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:15:05,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:15:05,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:15:05,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:15:05,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:15:05,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:15:05,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:15:05,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:15:05,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:15:05,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:15:05,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:15:05,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:15:05,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:15:05,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:15:05,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:15:05,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:15:05,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:15:05,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:15:05,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:15:05,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:15:05,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:15:05,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:15:05,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:15:05,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:15:05,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:15:05,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:15:05,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:15:05,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:15:05,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:15:05,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:15:05,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:15:05,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:15:05,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:15:05,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:15:05,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:15:05,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:15:05,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:15:05,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:15:05,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:15:05,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:15:05,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:15:05,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:15:05,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:15:05,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:15:05,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:15:05,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:15:05,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:15:05,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:15:05,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:15:05,909 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:15:05,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:15:05,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:15:05,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:15:05,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:15:05,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:15:05,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:15:05,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:15:05,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:15:05,911 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:15:05,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:15:05,911 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:15:05,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:15:05,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:15:05,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:15:05,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:15:05,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:15:05,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:15:05,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:15:05,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:15:05,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:15:05,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:15:05,913 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:15:05,913 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:15:05,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:15:05,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:15:05,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 252cd4a0f8e1adbe16c63dba2a525d461eb83ddbfd931d93e6b7ef83b52daaf7 [2021-12-16 01:15:06,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:15:06,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:15:06,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:15:06,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:15:06,128 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:15:06,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2021-12-16 01:15:06,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac54257fa/417b58eeff48430f9c49a07a075e7e5f/FLAGf29609668 [2021-12-16 01:15:06,582 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:15:06,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2021-12-16 01:15:06,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac54257fa/417b58eeff48430f9c49a07a075e7e5f/FLAGf29609668 [2021-12-16 01:15:06,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac54257fa/417b58eeff48430f9c49a07a075e7e5f [2021-12-16 01:15:06,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:15:06,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:15:06,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:15:06,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:15:06,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:15:06,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d13e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06, skipping insertion in model container [2021-12-16 01:15:06,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:15:06,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:15:06,796 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c[20056,20069] [2021-12-16 01:15:06,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:15:06,804 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:15:06,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c[20056,20069] [2021-12-16 01:15:06,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:15:06,850 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:15:06,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06 WrapperNode [2021-12-16 01:15:06,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:15:06,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:15:06,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:15:06,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:15:06,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,914 INFO L137 Inliner]: procedures = 26, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 454 [2021-12-16 01:15:06,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:15:06,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:15:06,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:15:06,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:15:06,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:15:06,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:15:06,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:15:06,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:15:06,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (1/1) ... [2021-12-16 01:15:06,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:15:06,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:15:06,998 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) [2021-12-16 01:15:06,999 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 [2021-12-16 01:15:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:15:07,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:15:07,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:15:07,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:15:07,124 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:15:07,125 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:15:07,487 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:15:07,495 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:15:07,496 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 01:15:07,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:15:07 BoogieIcfgContainer [2021-12-16 01:15:07,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:15:07,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:15:07,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:15:07,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:15:07,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:15:06" (1/3) ... [2021-12-16 01:15:07,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4188df8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:15:07, skipping insertion in model container [2021-12-16 01:15:07,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:15:06" (2/3) ... [2021-12-16 01:15:07,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4188df8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:15:07, skipping insertion in model container [2021-12-16 01:15:07,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:15:07" (3/3) ... [2021-12-16 01:15:07,506 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2021-12-16 01:15:07,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:15:07,511 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:15:07,547 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:15:07,553 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 [2021-12-16 01:15:07,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:15:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 01:15:07,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:07,577 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] [2021-12-16 01:15:07,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1781508813, now seen corresponding path program 1 times [2021-12-16 01:15:07,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:07,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003593484] [2021-12-16 01:15:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:07,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:07,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003593484] [2021-12-16 01:15:07,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003593484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:07,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:07,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 01:15:07,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713401136] [2021-12-16 01:15:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:07,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 01:15:07,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:07,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 01:15:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 01:15:07,778 INFO L87 Difference]: Start difference. First operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 states have internal predecessors, (221), 0 states have call successors, (0), 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 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:07,804 INFO L93 Difference]: Finished difference Result 201 states and 336 transitions. [2021-12-16 01:15:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 01:15:07,807 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-16 01:15:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:07,815 INFO L225 Difference]: With dead ends: 201 [2021-12-16 01:15:07,816 INFO L226 Difference]: Without dead ends: 124 [2021-12-16 01:15:07,819 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 [2021-12-16 01:15:07,822 INFO L933 BasicCegarLoop]: 218 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, 218 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 [2021-12-16 01:15:07,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-16 01:15:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-16 01:15:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.7398373983739837) internal successors, (214), 123 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2021-12-16 01:15:07,900 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 41 [2021-12-16 01:15:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:07,901 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2021-12-16 01:15:07,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2021-12-16 01:15:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 01:15:07,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:07,902 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] [2021-12-16 01:15:07,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:15:07,903 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2119091697, now seen corresponding path program 1 times [2021-12-16 01:15:07,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109221695] [2021-12-16 01:15:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:07,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109221695] [2021-12-16 01:15:08,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109221695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:15:08,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780730117] [2021-12-16 01:15:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:15:08,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:15:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:15:08,027 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:08,130 INFO L93 Difference]: Finished difference Result 196 states and 326 transitions. [2021-12-16 01:15:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:15:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-16 01:15:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:08,132 INFO L225 Difference]: With dead ends: 196 [2021-12-16 01:15:08,133 INFO L226 Difference]: Without dead ends: 124 [2021-12-16 01:15:08,133 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 [2021-12-16 01:15:08,134 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 3 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:08,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 795 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-16 01:15:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-16 01:15:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3333333333333333) internal successors, (164), 123 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2021-12-16 01:15:08,147 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 41 [2021-12-16 01:15:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:08,148 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2021-12-16 01:15:08,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2021-12-16 01:15:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:08,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:08,153 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] [2021-12-16 01:15:08,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:15:08,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1557003755, now seen corresponding path program 1 times [2021-12-16 01:15:08,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:08,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073269053] [2021-12-16 01:15:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:08,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073269053] [2021-12-16 01:15:08,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073269053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:08,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234928875] [2021-12-16 01:15:08,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:08,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:08,283 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:08,301 INFO L93 Difference]: Finished difference Result 254 states and 370 transitions. [2021-12-16 01:15:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:08,306 INFO L225 Difference]: With dead ends: 254 [2021-12-16 01:15:08,306 INFO L226 Difference]: Without dead ends: 186 [2021-12-16 01:15:08,306 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 [2021-12-16 01:15:08,311 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 98 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 364 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 [2021-12-16 01:15:08,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 364 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-16 01:15:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-12-16 01:15:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4207650273224044) internal successors, (260), 183 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 260 transitions. [2021-12-16 01:15:08,330 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 260 transitions. Word has length 90 [2021-12-16 01:15:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:08,331 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 260 transitions. [2021-12-16 01:15:08,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 260 transitions. [2021-12-16 01:15:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:08,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:08,336 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] [2021-12-16 01:15:08,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:15:08,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:08,338 INFO L85 PathProgramCache]: Analyzing trace with hash -309494901, now seen corresponding path program 1 times [2021-12-16 01:15:08,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:08,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494023500] [2021-12-16 01:15:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:08,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494023500] [2021-12-16 01:15:08,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494023500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:08,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264811106] [2021-12-16 01:15:08,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:08,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:08,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:08,422 INFO L87 Difference]: Start difference. First operand 184 states and 260 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:08,447 INFO L93 Difference]: Finished difference Result 428 states and 648 transitions. [2021-12-16 01:15:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:08,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:08,451 INFO L225 Difference]: With dead ends: 428 [2021-12-16 01:15:08,451 INFO L226 Difference]: Without dead ends: 300 [2021-12-16 01:15:08,454 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 [2021-12-16 01:15:08,460 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 94 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 363 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 [2021-12-16 01:15:08,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 363 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-16 01:15:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2021-12-16 01:15:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.4848484848484849) internal successors, (441), 297 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2021-12-16 01:15:08,481 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 90 [2021-12-16 01:15:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:08,482 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2021-12-16 01:15:08,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2021-12-16 01:15:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:08,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:08,484 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] [2021-12-16 01:15:08,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:15:08,484 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1050927103, now seen corresponding path program 1 times [2021-12-16 01:15:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:08,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302791048] [2021-12-16 01:15:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:08,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302791048] [2021-12-16 01:15:08,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302791048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:08,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601093205] [2021-12-16 01:15:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:08,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:08,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:08,541 INFO L87 Difference]: Start difference. First operand 298 states and 441 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:08,556 INFO L93 Difference]: Finished difference Result 758 states and 1171 transitions. [2021-12-16 01:15:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:08,559 INFO L225 Difference]: With dead ends: 758 [2021-12-16 01:15:08,559 INFO L226 Difference]: Without dead ends: 516 [2021-12-16 01:15:08,559 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 [2021-12-16 01:15:08,560 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 362 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 [2021-12-16 01:15:08,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 362 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-16 01:15:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 514. [2021-12-16 01:15:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.5224171539961013) internal successors, (781), 513 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 781 transitions. [2021-12-16 01:15:08,573 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 781 transitions. Word has length 90 [2021-12-16 01:15:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:08,573 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 781 transitions. [2021-12-16 01:15:08,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 781 transitions. [2021-12-16 01:15:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:08,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:08,574 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] [2021-12-16 01:15:08,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:15:08,574 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1796509833, now seen corresponding path program 1 times [2021-12-16 01:15:08,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:08,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217998035] [2021-12-16 01:15:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:08,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217998035] [2021-12-16 01:15:08,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217998035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:08,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290538342] [2021-12-16 01:15:08,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:08,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:08,610 INFO L87 Difference]: Start difference. First operand 514 states and 781 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:08,629 INFO L93 Difference]: Finished difference Result 1382 states and 2151 transitions. [2021-12-16 01:15:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:08,632 INFO L225 Difference]: With dead ends: 1382 [2021-12-16 01:15:08,632 INFO L226 Difference]: Without dead ends: 924 [2021-12-16 01:15:08,633 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 [2021-12-16 01:15:08,633 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 86 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 361 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 [2021-12-16 01:15:08,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 361 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-16 01:15:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 922. [2021-12-16 01:15:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.5385450597176982) internal successors, (1417), 921 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1417 transitions. [2021-12-16 01:15:08,650 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1417 transitions. Word has length 90 [2021-12-16 01:15:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:08,650 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1417 transitions. [2021-12-16 01:15:08,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1417 transitions. [2021-12-16 01:15:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:08,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:08,651 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] [2021-12-16 01:15:08,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:15:08,651 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash -259221845, now seen corresponding path program 1 times [2021-12-16 01:15:08,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:08,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967096474] [2021-12-16 01:15:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:08,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967096474] [2021-12-16 01:15:08,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967096474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:08,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512862788] [2021-12-16 01:15:08,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:08,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:08,686 INFO L87 Difference]: Start difference. First operand 922 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:08,719 INFO L93 Difference]: Finished difference Result 2558 states and 3979 transitions. [2021-12-16 01:15:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:08,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:08,725 INFO L225 Difference]: With dead ends: 2558 [2021-12-16 01:15:08,725 INFO L226 Difference]: Without dead ends: 1692 [2021-12-16 01:15:08,726 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 [2021-12-16 01:15:08,726 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 82 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 360 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 [2021-12-16 01:15:08,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 360 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-12-16 01:15:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1690. [2021-12-16 01:15:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.5399644760213145) internal successors, (2601), 1689 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2601 transitions. [2021-12-16 01:15:08,758 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2601 transitions. Word has length 90 [2021-12-16 01:15:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:08,758 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2601 transitions. [2021-12-16 01:15:08,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2601 transitions. [2021-12-16 01:15:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:08,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:08,759 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] [2021-12-16 01:15:08,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:15:08,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1420392415, now seen corresponding path program 1 times [2021-12-16 01:15:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515954393] [2021-12-16 01:15:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:08,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515954393] [2021-12-16 01:15:08,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515954393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:08,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963757617] [2021-12-16 01:15:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:08,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:08,795 INFO L87 Difference]: Start difference. First operand 1690 states and 2601 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:08,865 INFO L93 Difference]: Finished difference Result 4766 states and 7371 transitions. [2021-12-16 01:15:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:08,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:08,874 INFO L225 Difference]: With dead ends: 4766 [2021-12-16 01:15:08,875 INFO L226 Difference]: Without dead ends: 3132 [2021-12-16 01:15:08,877 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 [2021-12-16 01:15:08,877 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 78 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 359 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 [2021-12-16 01:15:08,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 359 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:08,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-12-16 01:15:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3130. [2021-12-16 01:15:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 3129 states have (on average 1.531799296899968) internal successors, (4793), 3129 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4793 transitions. [2021-12-16 01:15:08,950 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4793 transitions. Word has length 90 [2021-12-16 01:15:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:08,951 INFO L470 AbstractCegarLoop]: Abstraction has 3130 states and 4793 transitions. [2021-12-16 01:15:08,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4793 transitions. [2021-12-16 01:15:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:08,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:08,952 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] [2021-12-16 01:15:08,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:15:08,952 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1758185557, now seen corresponding path program 1 times [2021-12-16 01:15:08,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651821003] [2021-12-16 01:15:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:08,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:08,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651821003] [2021-12-16 01:15:08,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651821003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:08,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:08,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:08,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365707945] [2021-12-16 01:15:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:08,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:08,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:08,986 INFO L87 Difference]: Start difference. First operand 3130 states and 4793 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:09,095 INFO L93 Difference]: Finished difference Result 8894 states and 13627 transitions. [2021-12-16 01:15:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:09,112 INFO L225 Difference]: With dead ends: 8894 [2021-12-16 01:15:09,112 INFO L226 Difference]: Without dead ends: 5820 [2021-12-16 01:15:09,118 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 [2021-12-16 01:15:09,119 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 74 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 358 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 [2021-12-16 01:15:09,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-12-16 01:15:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5818. [2021-12-16 01:15:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 1.5171050369606327) internal successors, (8825), 5817 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 8825 transitions. [2021-12-16 01:15:09,300 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 8825 transitions. Word has length 90 [2021-12-16 01:15:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:09,300 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 8825 transitions. [2021-12-16 01:15:09,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 8825 transitions. [2021-12-16 01:15:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 01:15:09,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:09,303 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] [2021-12-16 01:15:09,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:15:09,303 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1318796341, now seen corresponding path program 1 times [2021-12-16 01:15:09,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337328029] [2021-12-16 01:15:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:09,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:09,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:09,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337328029] [2021-12-16 01:15:09,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337328029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:09,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:09,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 01:15:09,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690386069] [2021-12-16 01:15:09,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:09,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:15:09,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:15:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:09,395 INFO L87 Difference]: Start difference. First operand 5818 states and 8825 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:11,015 INFO L93 Difference]: Finished difference Result 86486 states and 131591 transitions. [2021-12-16 01:15:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:15:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-16 01:15:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:11,200 INFO L225 Difference]: With dead ends: 86486 [2021-12-16 01:15:11,201 INFO L226 Difference]: Without dead ends: 80724 [2021-12-16 01:15:11,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-16 01:15:11,238 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 3049 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3049 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:11,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 1799 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80724 states. [2021-12-16 01:15:12,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80724 to 11578. [2021-12-16 01:15:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4975382223373932) internal successors, (17337), 11577 states have internal predecessors, (17337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17337 transitions. [2021-12-16 01:15:12,253 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17337 transitions. Word has length 90 [2021-12-16 01:15:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:12,254 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17337 transitions. [2021-12-16 01:15:12,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17337 transitions. [2021-12-16 01:15:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 01:15:12,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:12,255 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] [2021-12-16 01:15:12,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:15:12,255 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1697127869, now seen corresponding path program 1 times [2021-12-16 01:15:12,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:12,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095918850] [2021-12-16 01:15:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:12,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:12,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:12,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095918850] [2021-12-16 01:15:12,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095918850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:12,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:12,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 01:15:12,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768967525] [2021-12-16 01:15:12,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:12,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:15:12,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:15:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:12,431 INFO L87 Difference]: Start difference. First operand 11578 states and 17337 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:13,026 INFO L93 Difference]: Finished difference Result 23102 states and 34619 transitions. [2021-12-16 01:15:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:15:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-16 01:15:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:13,045 INFO L225 Difference]: With dead ends: 23102 [2021-12-16 01:15:13,046 INFO L226 Difference]: Without dead ends: 11580 [2021-12-16 01:15:13,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-16 01:15:13,057 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 749 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:13,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 785 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2021-12-16 01:15:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 11578. [2021-12-16 01:15:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4864818173965622) internal successors, (17209), 11577 states have internal predecessors, (17209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17209 transitions. [2021-12-16 01:15:13,490 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17209 transitions. Word has length 92 [2021-12-16 01:15:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:13,490 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17209 transitions. [2021-12-16 01:15:13,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17209 transitions. [2021-12-16 01:15:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 01:15:13,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:13,492 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] [2021-12-16 01:15:13,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:15:13,493 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1763621381, now seen corresponding path program 1 times [2021-12-16 01:15:13,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941479006] [2021-12-16 01:15:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:13,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:13,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941479006] [2021-12-16 01:15:13,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941479006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:13,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:13,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:15:13,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760051158] [2021-12-16 01:15:13,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:13,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:15:13,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:15:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:15:13,523 INFO L87 Difference]: Start difference. First operand 11578 states and 17209 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:13,919 INFO L93 Difference]: Finished difference Result 28544 states and 42429 transitions. [2021-12-16 01:15:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:15:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-16 01:15:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:13,952 INFO L225 Difference]: With dead ends: 28544 [2021-12-16 01:15:13,953 INFO L226 Difference]: Without dead ends: 17022 [2021-12-16 01:15:13,970 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 [2021-12-16 01:15:13,971 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 66 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:13,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 314 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-12-16 01:15:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 17020. [2021-12-16 01:15:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.473823373876256) internal successors, (25083), 17019 states have internal predecessors, (25083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 25083 transitions. [2021-12-16 01:15:14,553 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 25083 transitions. Word has length 92 [2021-12-16 01:15:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:14,553 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 25083 transitions. [2021-12-16 01:15:14,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 25083 transitions. [2021-12-16 01:15:14,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 01:15:14,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:14,554 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] [2021-12-16 01:15:14,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 01:15:14,554 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1486079254, now seen corresponding path program 1 times [2021-12-16 01:15:14,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:14,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929243985] [2021-12-16 01:15:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:14,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:14,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:14,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929243985] [2021-12-16 01:15:14,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929243985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:14,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:14,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:15:14,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056694105] [2021-12-16 01:15:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:14,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:15:14,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:14,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:15:14,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:15:14,605 INFO L87 Difference]: Start difference. First operand 17020 states and 25083 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:15,217 INFO L93 Difference]: Finished difference Result 33982 states and 50108 transitions. [2021-12-16 01:15:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:15:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-16 01:15:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:15,246 INFO L225 Difference]: With dead ends: 33982 [2021-12-16 01:15:15,246 INFO L226 Difference]: Without dead ends: 17020 [2021-12-16 01:15:15,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:15,264 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 525 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:15,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 190 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-16 01:15:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-16 01:15:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4625418649744404) internal successors, (24891), 17019 states have internal predecessors, (24891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24891 transitions. [2021-12-16 01:15:15,947 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24891 transitions. Word has length 93 [2021-12-16 01:15:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:15,947 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24891 transitions. [2021-12-16 01:15:15,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24891 transitions. [2021-12-16 01:15:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 01:15:15,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:15,948 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] [2021-12-16 01:15:15,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 01:15:15,949 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:15,949 INFO L85 PathProgramCache]: Analyzing trace with hash 202864488, now seen corresponding path program 1 times [2021-12-16 01:15:15,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:15,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132944196] [2021-12-16 01:15:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:15,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:15,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132944196] [2021-12-16 01:15:15,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132944196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:15,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:15,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:15:15,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901674501] [2021-12-16 01:15:15,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:15,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:15:16,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:15:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:15:16,000 INFO L87 Difference]: Start difference. First operand 17020 states and 24891 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:16,683 INFO L93 Difference]: Finished difference Result 33982 states and 49724 transitions. [2021-12-16 01:15:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:15:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-16 01:15:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:16,713 INFO L225 Difference]: With dead ends: 33982 [2021-12-16 01:15:16,713 INFO L226 Difference]: Without dead ends: 17020 [2021-12-16 01:15:16,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:16,736 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 557 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:16,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 195 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-16 01:15:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-16 01:15:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4512603560726247) internal successors, (24699), 17019 states have internal predecessors, (24699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24699 transitions. [2021-12-16 01:15:17,398 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24699 transitions. Word has length 93 [2021-12-16 01:15:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:17,398 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24699 transitions. [2021-12-16 01:15:17,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24699 transitions. [2021-12-16 01:15:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 01:15:17,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:17,399 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] [2021-12-16 01:15:17,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 01:15:17,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2008302822, now seen corresponding path program 1 times [2021-12-16 01:15:17,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785225143] [2021-12-16 01:15:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:17,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:17,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:17,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785225143] [2021-12-16 01:15:17,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785225143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:17,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:17,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 01:15:17,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656861057] [2021-12-16 01:15:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:17,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 01:15:17,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 01:15:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:15:17,460 INFO L87 Difference]: Start difference. First operand 17020 states and 24699 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:18,503 INFO L93 Difference]: Finished difference Result 31519 states and 45297 transitions. [2021-12-16 01:15:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:15:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-16 01:15:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:18,553 INFO L225 Difference]: With dead ends: 31519 [2021-12-16 01:15:18,553 INFO L226 Difference]: Without dead ends: 31517 [2021-12-16 01:15:18,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-16 01:15:18,565 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 820 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:18,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 817 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:15:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31517 states. [2021-12-16 01:15:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31517 to 17788. [2021-12-16 01:15:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17788 states, 17787 states have (on average 1.4281778827233373) internal successors, (25403), 17787 states have internal predecessors, (25403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17788 states to 17788 states and 25403 transitions. [2021-12-16 01:15:19,337 INFO L78 Accepts]: Start accepts. Automaton has 17788 states and 25403 transitions. Word has length 93 [2021-12-16 01:15:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:19,338 INFO L470 AbstractCegarLoop]: Abstraction has 17788 states and 25403 transitions. [2021-12-16 01:15:19,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17788 states and 25403 transitions. [2021-12-16 01:15:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:15:19,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:19,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:15:19,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 01:15:19,347 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1787662099, now seen corresponding path program 1 times [2021-12-16 01:15:19,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:19,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40600770] [2021-12-16 01:15:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:19,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 01:15:19,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:19,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40600770] [2021-12-16 01:15:19,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40600770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:19,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:19,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 01:15:19,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466182067] [2021-12-16 01:15:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:19,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:15:19,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:15:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:19,419 INFO L87 Difference]: Start difference. First operand 17788 states and 25403 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:24,229 INFO L93 Difference]: Finished difference Result 145356 states and 207555 transitions. [2021-12-16 01:15:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:15:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 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 129 [2021-12-16 01:15:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:24,436 INFO L225 Difference]: With dead ends: 145356 [2021-12-16 01:15:24,436 INFO L226 Difference]: Without dead ends: 127626 [2021-12-16 01:15:24,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-16 01:15:24,484 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 2142 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:24,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2142 Valid, 1211 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127626 states. [2021-12-16 01:15:27,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127626 to 35516. [2021-12-16 01:15:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35516 states, 35515 states have (on average 1.4234830353371815) internal successors, (50555), 35515 states have internal predecessors, (50555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35516 states to 35516 states and 50555 transitions. [2021-12-16 01:15:27,182 INFO L78 Accepts]: Start accepts. Automaton has 35516 states and 50555 transitions. Word has length 129 [2021-12-16 01:15:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:27,182 INFO L470 AbstractCegarLoop]: Abstraction has 35516 states and 50555 transitions. [2021-12-16 01:15:27,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 35516 states and 50555 transitions. [2021-12-16 01:15:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:15:27,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:27,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:15:27,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 01:15:27,194 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:27,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash 18879283, now seen corresponding path program 1 times [2021-12-16 01:15:27,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:27,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210875179] [2021-12-16 01:15:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:27,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:15:27,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210875179] [2021-12-16 01:15:27,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210875179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:27,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:27,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 01:15:27,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052871204] [2021-12-16 01:15:27,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:27,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:15:27,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:15:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:27,278 INFO L87 Difference]: Start difference. First operand 35516 states and 50555 transitions. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:33,160 INFO L93 Difference]: Finished difference Result 163084 states and 232707 transitions. [2021-12-16 01:15:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:15:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 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 129 [2021-12-16 01:15:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:33,398 INFO L225 Difference]: With dead ends: 163084 [2021-12-16 01:15:33,398 INFO L226 Difference]: Without dead ends: 145354 [2021-12-16 01:15:33,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-16 01:15:33,442 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 1891 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:33,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1891 Valid, 1285 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145354 states. [2021-12-16 01:15:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145354 to 62140. [2021-12-16 01:15:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62140 states, 62139 states have (on average 1.4181592880477638) internal successors, (88123), 62139 states have internal predecessors, (88123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62140 states to 62140 states and 88123 transitions. [2021-12-16 01:15:37,287 INFO L78 Accepts]: Start accepts. Automaton has 62140 states and 88123 transitions. Word has length 129 [2021-12-16 01:15:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:37,288 INFO L470 AbstractCegarLoop]: Abstraction has 62140 states and 88123 transitions. [2021-12-16 01:15:37,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 62140 states and 88123 transitions. [2021-12-16 01:15:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:15:37,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:37,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:15:37,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 01:15:37,303 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:37,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1150519123, now seen corresponding path program 1 times [2021-12-16 01:15:37,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:37,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234404942] [2021-12-16 01:15:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:37,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 01:15:37,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:37,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234404942] [2021-12-16 01:15:37,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234404942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:37,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:37,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 01:15:37,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906483102] [2021-12-16 01:15:37,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:37,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:15:37,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:15:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:37,407 INFO L87 Difference]: Start difference. First operand 62140 states and 88123 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:15:44,492 INFO L93 Difference]: Finished difference Result 180812 states and 257859 transitions. [2021-12-16 01:15:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:15:44,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 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 129 [2021-12-16 01:15:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:15:44,752 INFO L225 Difference]: With dead ends: 180812 [2021-12-16 01:15:44,753 INFO L226 Difference]: Without dead ends: 163082 [2021-12-16 01:15:44,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-16 01:15:44,801 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 1805 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:15:44,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1805 Valid, 1337 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:15:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163082 states. [2021-12-16 01:15:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163082 to 79868. [2021-12-16 01:15:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79868 states, 79867 states have (on average 1.418295416129315) internal successors, (113275), 79867 states have internal predecessors, (113275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79868 states to 79868 states and 113275 transitions. [2021-12-16 01:15:49,772 INFO L78 Accepts]: Start accepts. Automaton has 79868 states and 113275 transitions. Word has length 129 [2021-12-16 01:15:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:15:49,772 INFO L470 AbstractCegarLoop]: Abstraction has 79868 states and 113275 transitions. [2021-12-16 01:15:49,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:15:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 79868 states and 113275 transitions. [2021-12-16 01:15:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:15:49,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:15:49,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:15:49,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 01:15:49,788 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:15:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:15:49,789 INFO L85 PathProgramCache]: Analyzing trace with hash -84939917, now seen corresponding path program 1 times [2021-12-16 01:15:49,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:15:49,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143922322] [2021-12-16 01:15:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:15:49,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:15:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:15:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 01:15:49,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:15:49,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143922322] [2021-12-16 01:15:49,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143922322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:15:49,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:15:49,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 01:15:49,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449701396] [2021-12-16 01:15:49,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:15:49,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:15:49,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:49,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:15:49,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:15:49,880 INFO L87 Difference]: Start difference. First operand 79868 states and 113275 transitions. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)