./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.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 c07e007f9f3a362ec25382ccff24a1aeded702728f7c63228a63ffce5d34476e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:52:21,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:52:21,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:52:21,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:52:21,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:52:21,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:52:21,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:52:21,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:52:21,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:52:21,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:52:21,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:52:21,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:52:21,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:52:21,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:52:21,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:52:21,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:52:21,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:52:21,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:52:21,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:52:21,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:52:21,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:52:21,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:52:21,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:52:21,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:52:21,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:52:21,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:52:21,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:52:21,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:52:21,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:52:21,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:52:21,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:52:21,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:52:21,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:52:21,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:52:21,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:52:21,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:52:21,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:52:21,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:52:21,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:52:21,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:52:21,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:52:21,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 20:52:22,007 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:52:22,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:52:22,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:52:22,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:52:22,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:52:22,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:52:22,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:52:22,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:52:22,011 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:52:22,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:52:22,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:52:22,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 20:52:22,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:52:22,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:52:22,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:52:22,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:52:22,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:52:22,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:52:22,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:52:22,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:52:22,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:52:22,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:52:22,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:52:22,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:52:22,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:52:22,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:52:22,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:52:22,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:52:22,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 20:52:22,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 20:52:22,015 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:52:22,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:52:22,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:52:22,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:52:22,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c07e007f9f3a362ec25382ccff24a1aeded702728f7c63228a63ffce5d34476e [2021-12-17 20:52:22,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:52:22,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:52:22,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:52:22,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:52:22,293 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:52:22,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2021-12-17 20:52:22,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e043baadf/7aab0feeb3ac4499851779d7103a368b/FLAG68c9f1799 [2021-12-17 20:52:23,013 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:52:23,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2021-12-17 20:52:23,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e043baadf/7aab0feeb3ac4499851779d7103a368b/FLAG68c9f1799 [2021-12-17 20:52:23,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e043baadf/7aab0feeb3ac4499851779d7103a368b [2021-12-17 20:52:23,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:52:23,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:52:23,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:52:23,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:52:23,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:52:23,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:52:23" (1/1) ... [2021-12-17 20:52:23,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b1927f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:23, skipping insertion in model container [2021-12-17 20:52:23,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:52:23" (1/1) ... [2021-12-17 20:52:23,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:52:23,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:52:23,691 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[11640,11653] [2021-12-17 20:52:23,711 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[12482,12495] [2021-12-17 20:52:24,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:52:24,385 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:52:24,422 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[11640,11653] [2021-12-17 20:52:24,428 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[12482,12495] [2021-12-17 20:52:24,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:52:24,839 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:52:24,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24 WrapperNode [2021-12-17 20:52:24,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:52:24,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:52:24,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:52:24,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:52:24,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:24,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,228 INFO L137 Inliner]: procedures = 36, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5090 [2021-12-17 20:52:25,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:52:25,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:52:25,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:52:25,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:52:25,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:52:25,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:52:25,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:52:25,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:52:25,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (1/1) ... [2021-12-17 20:52:25,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:52:25,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:52:25,809 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) [2021-12-17 20:52:25,859 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 [2021-12-17 20:52:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:52:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 20:52:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:52:25,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:52:26,098 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:52:26,102 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:52:29,478 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:52:29,498 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:52:29,498 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 20:52:29,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:52:29 BoogieIcfgContainer [2021-12-17 20:52:29,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:52:29,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:52:29,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:52:29,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:52:29,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:52:23" (1/3) ... [2021-12-17 20:52:29,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e99449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:52:29, skipping insertion in model container [2021-12-17 20:52:29,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:24" (2/3) ... [2021-12-17 20:52:29,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e99449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:52:29, skipping insertion in model container [2021-12-17 20:52:29,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:52:29" (3/3) ... [2021-12-17 20:52:29,508 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2021-12-17 20:52:29,512 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:52:29,513 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:52:29,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:52:29,563 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 [2021-12-17 20:52:29,563 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:52:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 20:52:29,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:29,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:29,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:29,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2089036915, now seen corresponding path program 1 times [2021-12-17 20:52:29,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:29,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234135643] [2021-12-17 20:52:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:29,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:29,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234135643] [2021-12-17 20:52:29,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234135643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:29,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:29,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:52:29,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897712295] [2021-12-17 20:52:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:29,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:29,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:29,828 INFO L87 Difference]: Start difference. First operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:33,442 INFO L93 Difference]: Finished difference Result 2536 states and 4876 transitions. [2021-12-17 20:52:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-17 20:52:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:33,468 INFO L225 Difference]: With dead ends: 2536 [2021-12-17 20:52:33,469 INFO L226 Difference]: Without dead ends: 1594 [2021-12-17 20:52:33,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:33,479 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1006 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:33,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 257 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 20:52:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-12-17 20:52:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-12-17 20:52:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.8618090452261307) internal successors, (2964), 1593 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2964 transitions. [2021-12-17 20:52:33,588 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2964 transitions. Word has length 7 [2021-12-17 20:52:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:33,589 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2964 transitions. [2021-12-17 20:52:33,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2964 transitions. [2021-12-17 20:52:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 20:52:33,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:33,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:33,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 20:52:33,591 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2021-12-17 20:52:33,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:33,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377791919] [2021-12-17 20:52:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:33,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:33,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377791919] [2021-12-17 20:52:33,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377791919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:33,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:33,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:52:33,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380275639] [2021-12-17 20:52:33,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:33,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:52:33,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:52:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:52:33,666 INFO L87 Difference]: Start difference. First operand 1594 states and 2964 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:33,738 INFO L93 Difference]: Finished difference Result 1650 states and 3050 transitions. [2021-12-17 20:52:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:52:33,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-17 20:52:33,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:33,746 INFO L225 Difference]: With dead ends: 1650 [2021-12-17 20:52:33,746 INFO L226 Difference]: Without dead ends: 1594 [2021-12-17 20:52:33,749 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 [2021-12-17 20:52:33,751 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 3 mSDsluCounter, 4727 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6314 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:33,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6314 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:33,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-12-17 20:52:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-12-17 20:52:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.8423366834170853) internal successors, (2933), 1593 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2933 transitions. [2021-12-17 20:52:33,789 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2933 transitions. Word has length 34 [2021-12-17 20:52:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:33,789 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2933 transitions. [2021-12-17 20:52:33,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2933 transitions. [2021-12-17 20:52:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:33,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:33,792 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] [2021-12-17 20:52:33,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 20:52:33,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2021-12-17 20:52:33,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:33,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430660136] [2021-12-17 20:52:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:33,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:33,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:33,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430660136] [2021-12-17 20:52:33,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430660136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:33,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:33,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:33,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460561834] [2021-12-17 20:52:33,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:33,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:33,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:33,949 INFO L87 Difference]: Start difference. First operand 1594 states and 2933 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:33,983 INFO L93 Difference]: Finished difference Result 1692 states and 3087 transitions. [2021-12-17 20:52:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-17 20:52:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:33,991 INFO L225 Difference]: With dead ends: 1692 [2021-12-17 20:52:33,991 INFO L226 Difference]: Without dead ends: 1640 [2021-12-17 20:52:33,992 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 [2021-12-17 20:52:33,993 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 1511 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1706 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 [2021-12-17 20:52:33,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1706 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-12-17 20:52:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2021-12-17 20:52:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1636 states have (on average 1.8355745721271393) internal successors, (3003), 1637 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 3003 transitions. [2021-12-17 20:52:34,035 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 3003 transitions. Word has length 64 [2021-12-17 20:52:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:34,036 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 3003 transitions. [2021-12-17 20:52:34,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 3003 transitions. [2021-12-17 20:52:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:34,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:34,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:34,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 20:52:34,039 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2021-12-17 20:52:34,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:34,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12510185] [2021-12-17 20:52:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:34,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:34,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:34,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12510185] [2021-12-17 20:52:34,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12510185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:34,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:34,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:34,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868379876] [2021-12-17 20:52:34,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:34,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:34,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:34,102 INFO L87 Difference]: Start difference. First operand 1638 states and 3003 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:34,138 INFO L93 Difference]: Finished difference Result 1818 states and 3287 transitions. [2021-12-17 20:52:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-17 20:52:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:34,146 INFO L225 Difference]: With dead ends: 1818 [2021-12-17 20:52:34,147 INFO L226 Difference]: Without dead ends: 1722 [2021-12-17 20:52:34,148 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 [2021-12-17 20:52:34,149 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 1507 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1705 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 [2021-12-17 20:52:34,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1705 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-12-17 20:52:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2021-12-17 20:52:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1718 states have (on average 1.8230500582072178) internal successors, (3132), 1719 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 3132 transitions. [2021-12-17 20:52:34,191 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 3132 transitions. Word has length 64 [2021-12-17 20:52:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:34,191 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 3132 transitions. [2021-12-17 20:52:34,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 3132 transitions. [2021-12-17 20:52:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:34,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:34,193 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] [2021-12-17 20:52:34,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 20:52:34,194 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:34,195 INFO L85 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2021-12-17 20:52:34,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:34,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934364058] [2021-12-17 20:52:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:34,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:34,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934364058] [2021-12-17 20:52:34,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934364058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:34,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:34,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:34,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100607115] [2021-12-17 20:52:34,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:34,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:34,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:34,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:34,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:34,249 INFO L87 Difference]: Start difference. First operand 1720 states and 3132 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:34,288 INFO L93 Difference]: Finished difference Result 2052 states and 3654 transitions. [2021-12-17 20:52:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:34,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-17 20:52:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:34,297 INFO L225 Difference]: With dead ends: 2052 [2021-12-17 20:52:34,297 INFO L226 Difference]: Without dead ends: 1874 [2021-12-17 20:52:34,299 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 [2021-12-17 20:52:34,300 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 1503 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1704 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 [2021-12-17 20:52:34,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-12-17 20:52:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2021-12-17 20:52:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1870 states have (on average 1.8010695187165775) internal successors, (3368), 1871 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3368 transitions. [2021-12-17 20:52:34,351 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3368 transitions. Word has length 64 [2021-12-17 20:52:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:34,353 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 3368 transitions. [2021-12-17 20:52:34,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3368 transitions. [2021-12-17 20:52:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:34,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:34,357 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] [2021-12-17 20:52:34,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 20:52:34,358 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2021-12-17 20:52:34,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:34,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085682939] [2021-12-17 20:52:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:34,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:34,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085682939] [2021-12-17 20:52:34,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085682939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:34,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:34,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:34,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253533374] [2021-12-17 20:52:34,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:34,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:34,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:34,416 INFO L87 Difference]: Start difference. First operand 1872 states and 3368 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:34,464 INFO L93 Difference]: Finished difference Result 2484 states and 4322 transitions. [2021-12-17 20:52:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-17 20:52:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:34,475 INFO L225 Difference]: With dead ends: 2484 [2021-12-17 20:52:34,475 INFO L226 Difference]: Without dead ends: 2154 [2021-12-17 20:52:34,477 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 [2021-12-17 20:52:34,479 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 1499 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1703 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 [2021-12-17 20:52:34,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 1703 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-12-17 20:52:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2021-12-17 20:52:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2150 states have (on average 1.7655813953488373) internal successors, (3796), 2151 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3796 transitions. [2021-12-17 20:52:34,539 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3796 transitions. Word has length 64 [2021-12-17 20:52:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:34,540 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3796 transitions. [2021-12-17 20:52:34,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3796 transitions. [2021-12-17 20:52:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:34,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:34,542 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] [2021-12-17 20:52:34,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 20:52:34,542 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:34,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:34,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2021-12-17 20:52:34,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:34,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943230524] [2021-12-17 20:52:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:34,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:34,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:34,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943230524] [2021-12-17 20:52:34,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943230524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:34,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:34,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:34,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503780998] [2021-12-17 20:52:34,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:34,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:34,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:34,615 INFO L87 Difference]: Start difference. First operand 2152 states and 3796 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:34,671 INFO L93 Difference]: Finished difference Result 3276 states and 5526 transitions. [2021-12-17 20:52:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-17 20:52:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:34,683 INFO L225 Difference]: With dead ends: 3276 [2021-12-17 20:52:34,684 INFO L226 Difference]: Without dead ends: 2666 [2021-12-17 20:52:34,686 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 [2021-12-17 20:52:34,687 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 1495 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 1702 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 [2021-12-17 20:52:34,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 1702 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-12-17 20:52:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2021-12-17 20:52:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2662 states have (on average 1.7145003756574004) internal successors, (4564), 2663 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4564 transitions. [2021-12-17 20:52:34,763 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4564 transitions. Word has length 64 [2021-12-17 20:52:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:34,764 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 4564 transitions. [2021-12-17 20:52:34,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4564 transitions. [2021-12-17 20:52:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:34,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:34,765 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] [2021-12-17 20:52:34,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 20:52:34,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2021-12-17 20:52:34,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:34,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350509546] [2021-12-17 20:52:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:34,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:34,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:34,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350509546] [2021-12-17 20:52:34,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350509546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:34,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:34,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:34,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723845377] [2021-12-17 20:52:34,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:34,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:34,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:34,871 INFO L87 Difference]: Start difference. First operand 2664 states and 4564 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:35,392 INFO L93 Difference]: Finished difference Result 13884 states and 21694 transitions. [2021-12-17 20:52:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 20:52:35,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-17 20:52:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:35,459 INFO L225 Difference]: With dead ends: 13884 [2021-12-17 20:52:35,459 INFO L226 Difference]: Without dead ends: 12762 [2021-12-17 20:52:35,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-17 20:52:35,466 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 8512 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8512 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:35,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8512 Valid, 2392 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:52:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2021-12-17 20:52:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2021-12-17 20:52:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3782 states have (on average 1.6425171866737176) internal successors, (6212), 3783 states have internal predecessors, (6212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 6212 transitions. [2021-12-17 20:52:35,682 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 6212 transitions. Word has length 64 [2021-12-17 20:52:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:35,684 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 6212 transitions. [2021-12-17 20:52:35,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 6212 transitions. [2021-12-17 20:52:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:52:35,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:35,687 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] [2021-12-17 20:52:35,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 20:52:35,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2021-12-17 20:52:35,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:35,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039774147] [2021-12-17 20:52:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:35,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:35,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039774147] [2021-12-17 20:52:35,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039774147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:35,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:35,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:35,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392273983] [2021-12-17 20:52:35,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:35,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:35,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:35,740 INFO L87 Difference]: Start difference. First operand 3784 states and 6212 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:35,867 INFO L93 Difference]: Finished difference Result 7070 states and 11128 transitions. [2021-12-17 20:52:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:35,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-17 20:52:35,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:35,879 INFO L225 Difference]: With dead ends: 7070 [2021-12-17 20:52:35,879 INFO L226 Difference]: Without dead ends: 4828 [2021-12-17 20:52:35,884 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 [2021-12-17 20:52:35,885 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 1487 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1665 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 [2021-12-17 20:52:35,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 1665 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-12-17 20:52:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-12-17 20:52:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.599917081260365) internal successors, (7718), 4825 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7718 transitions. [2021-12-17 20:52:36,054 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7718 transitions. Word has length 66 [2021-12-17 20:52:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:36,054 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7718 transitions. [2021-12-17 20:52:36,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7718 transitions. [2021-12-17 20:52:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:52:36,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:36,055 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] [2021-12-17 20:52:36,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 20:52:36,056 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:36,056 INFO L85 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2021-12-17 20:52:36,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:36,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082675362] [2021-12-17 20:52:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:36,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:36,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082675362] [2021-12-17 20:52:36,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082675362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:36,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:36,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:36,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589352708] [2021-12-17 20:52:36,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:36,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:36,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:36,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:36,201 INFO L87 Difference]: Start difference. First operand 4826 states and 7718 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:36,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:36,533 INFO L93 Difference]: Finished difference Result 8110 states and 12584 transitions. [2021-12-17 20:52:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:36,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-17 20:52:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:36,544 INFO L225 Difference]: With dead ends: 8110 [2021-12-17 20:52:36,545 INFO L226 Difference]: Without dead ends: 4828 [2021-12-17 20:52:36,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-17 20:52:36,550 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 6144 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:36,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6144 Valid, 1867 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-12-17 20:52:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-12-17 20:52:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.5899668325041458) internal successors, (7670), 4825 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7670 transitions. [2021-12-17 20:52:36,742 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7670 transitions. Word has length 66 [2021-12-17 20:52:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:36,743 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7670 transitions. [2021-12-17 20:52:36,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7670 transitions. [2021-12-17 20:52:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:52:36,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:36,745 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] [2021-12-17 20:52:36,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 20:52:36,745 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2021-12-17 20:52:36,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:36,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415058823] [2021-12-17 20:52:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:36,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:36,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415058823] [2021-12-17 20:52:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415058823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:36,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:36,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:52:36,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343128922] [2021-12-17 20:52:36,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:36,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:52:36,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:36,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:52:36,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:52:36,820 INFO L87 Difference]: Start difference. First operand 4826 states and 7670 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:37,047 INFO L93 Difference]: Finished difference Result 8108 states and 12487 transitions. [2021-12-17 20:52:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:52:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-17 20:52:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:37,058 INFO L225 Difference]: With dead ends: 8108 [2021-12-17 20:52:37,058 INFO L226 Difference]: Without dead ends: 4826 [2021-12-17 20:52:37,065 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 [2021-12-17 20:52:37,066 INFO L933 BasicCegarLoop]: 1519 mSDtfsCounter, 4627 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:37,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 3022 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-12-17 20:52:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-12-17 20:52:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.580016583747927) internal successors, (7622), 4825 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7622 transitions. [2021-12-17 20:52:37,267 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7622 transitions. Word has length 67 [2021-12-17 20:52:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:37,267 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7622 transitions. [2021-12-17 20:52:37,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7622 transitions. [2021-12-17 20:52:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:52:37,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:37,268 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] [2021-12-17 20:52:37,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 20:52:37,269 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2021-12-17 20:52:37,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582740104] [2021-12-17 20:52:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:37,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:37,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:37,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582740104] [2021-12-17 20:52:37,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582740104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:37,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:37,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:52:37,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421769656] [2021-12-17 20:52:37,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:37,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:52:37,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:52:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:52:37,331 INFO L87 Difference]: Start difference. First operand 4826 states and 7622 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:37,550 INFO L93 Difference]: Finished difference Result 8108 states and 12391 transitions. [2021-12-17 20:52:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:52:37,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-17 20:52:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:37,560 INFO L225 Difference]: With dead ends: 8108 [2021-12-17 20:52:37,560 INFO L226 Difference]: Without dead ends: 4826 [2021-12-17 20:52:37,566 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 [2021-12-17 20:52:37,566 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 4660 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4660 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:37,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4660 Valid, 3023 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:52:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-12-17 20:52:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-12-17 20:52:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.5700663349917081) internal successors, (7574), 4825 states have internal predecessors, (7574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7574 transitions. [2021-12-17 20:52:37,779 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7574 transitions. Word has length 67 [2021-12-17 20:52:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:37,779 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7574 transitions. [2021-12-17 20:52:37,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7574 transitions. [2021-12-17 20:52:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:52:37,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:37,781 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] [2021-12-17 20:52:37,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 20:52:37,781 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2021-12-17 20:52:37,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:37,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624550330] [2021-12-17 20:52:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:37,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:37,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624550330] [2021-12-17 20:52:37,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624550330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:37,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:37,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:52:37,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487664605] [2021-12-17 20:52:37,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:37,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:52:37,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:52:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:52:37,865 INFO L87 Difference]: Start difference. First operand 4826 states and 7574 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:38,258 INFO L93 Difference]: Finished difference Result 7669 states and 11548 transitions. [2021-12-17 20:52:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 20:52:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-17 20:52:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:38,277 INFO L225 Difference]: With dead ends: 7669 [2021-12-17 20:52:38,277 INFO L226 Difference]: Without dead ends: 7667 [2021-12-17 20:52:38,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 20:52:38,281 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 616 mSDsluCounter, 9065 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 10643 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 [2021-12-17 20:52:38,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 10643 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2021-12-17 20:52:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2021-12-17 20:52:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.5450558213716108) internal successors, (7750), 5017 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7750 transitions. [2021-12-17 20:52:38,532 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7750 transitions. Word has length 67 [2021-12-17 20:52:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:38,533 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 7750 transitions. [2021-12-17 20:52:38,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7750 transitions. [2021-12-17 20:52:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 20:52:38,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:38,534 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:52:38,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 20:52:38,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash -868404168, now seen corresponding path program 1 times [2021-12-17 20:52:38,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:38,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022447572] [2021-12-17 20:52:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:38,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:38,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022447572] [2021-12-17 20:52:38,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022447572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:38,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:38,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:52:38,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729207682] [2021-12-17 20:52:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:38,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:38,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:38,610 INFO L87 Difference]: Start difference. First operand 5018 states and 7750 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:41,776 INFO L93 Difference]: Finished difference Result 8026 states and 13374 transitions. [2021-12-17 20:52:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-17 20:52:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:41,792 INFO L225 Difference]: With dead ends: 8026 [2021-12-17 20:52:41,792 INFO L226 Difference]: Without dead ends: 6522 [2021-12-17 20:52:41,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:41,798 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 1034 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:41,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 471 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 20:52:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-12-17 20:52:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 6520. [2021-12-17 20:52:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6520 states, 6518 states have (on average 1.5199447683338447) internal successors, (9907), 6519 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9907 transitions. [2021-12-17 20:52:42,052 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9907 transitions. Word has length 80 [2021-12-17 20:52:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:42,052 INFO L470 AbstractCegarLoop]: Abstraction has 6520 states and 9907 transitions. [2021-12-17 20:52:42,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9907 transitions. [2021-12-17 20:52:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 20:52:42,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:42,056 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:52:42,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 20:52:42,056 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1023837586, now seen corresponding path program 1 times [2021-12-17 20:52:42,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:42,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114417163] [2021-12-17 20:52:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:42,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:42,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:42,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114417163] [2021-12-17 20:52:42,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114417163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:42,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:42,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:52:42,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31772352] [2021-12-17 20:52:42,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:42,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:42,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:42,110 INFO L87 Difference]: Start difference. First operand 6520 states and 9907 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:44,886 INFO L93 Difference]: Finished difference Result 12530 states and 19844 transitions. [2021-12-17 20:52:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-17 20:52:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:44,909 INFO L225 Difference]: With dead ends: 12530 [2021-12-17 20:52:44,909 INFO L226 Difference]: Without dead ends: 9524 [2021-12-17 20:52:44,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:44,921 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 829 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:44,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 610 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 20:52:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2021-12-17 20:52:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 9524. [2021-12-17 20:52:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9522 states have (on average 1.4258559126233985) internal successors, (13577), 9523 states have internal predecessors, (13577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 13577 transitions. [2021-12-17 20:52:45,190 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 13577 transitions. Word has length 93 [2021-12-17 20:52:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:45,191 INFO L470 AbstractCegarLoop]: Abstraction has 9524 states and 13577 transitions. [2021-12-17 20:52:45,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 13577 transitions. [2021-12-17 20:52:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:45,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:45,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:45,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 20:52:45,197 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:45,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2021-12-17 20:52:45,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:45,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630840649] [2021-12-17 20:52:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:45,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 20:52:45,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:45,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630840649] [2021-12-17 20:52:45,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630840649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:45,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:45,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:45,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861514083] [2021-12-17 20:52:45,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:45,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:45,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:45,277 INFO L87 Difference]: Start difference. First operand 9524 states and 13577 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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) [2021-12-17 20:52:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:46,029 INFO L93 Difference]: Finished difference Result 27600 states and 39007 transitions. [2021-12-17 20:52:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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 95 [2021-12-17 20:52:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:46,082 INFO L225 Difference]: With dead ends: 27600 [2021-12-17 20:52:46,083 INFO L226 Difference]: Without dead ends: 24126 [2021-12-17 20:52:46,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:46,100 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6579 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6579 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:46,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6579 Valid, 3547 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24126 states. [2021-12-17 20:52:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24126 to 12996. [2021-12-17 20:52:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12996 states, 12994 states have (on average 1.4179621363706325) internal successors, (18425), 12995 states have internal predecessors, (18425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12996 states to 12996 states and 18425 transitions. [2021-12-17 20:52:46,586 INFO L78 Accepts]: Start accepts. Automaton has 12996 states and 18425 transitions. Word has length 95 [2021-12-17 20:52:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:46,586 INFO L470 AbstractCegarLoop]: Abstraction has 12996 states and 18425 transitions. [2021-12-17 20:52:46,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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) [2021-12-17 20:52:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 12996 states and 18425 transitions. [2021-12-17 20:52:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:46,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:46,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:46,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 20:52:46,642 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2021-12-17 20:52:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:46,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818725747] [2021-12-17 20:52:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:46,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 20:52:46,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818725747] [2021-12-17 20:52:46,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818725747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:46,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:46,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:46,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470726997] [2021-12-17 20:52:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:46,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:46,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:46,723 INFO L87 Difference]: Start difference. First operand 12996 states and 18425 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:47,591 INFO L93 Difference]: Finished difference Result 31072 states and 43855 transitions. [2021-12-17 20:52:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 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 95 [2021-12-17 20:52:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:47,638 INFO L225 Difference]: With dead ends: 31072 [2021-12-17 20:52:47,638 INFO L226 Difference]: Without dead ends: 27598 [2021-12-17 20:52:47,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:47,656 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6480 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6480 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:47,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6480 Valid, 3582 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2021-12-17 20:52:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 18212. [2021-12-17 20:52:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18212 states, 18210 states have (on average 1.4089511257550795) internal successors, (25657), 18211 states have internal predecessors, (25657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18212 states to 18212 states and 25657 transitions. [2021-12-17 20:52:48,333 INFO L78 Accepts]: Start accepts. Automaton has 18212 states and 25657 transitions. Word has length 95 [2021-12-17 20:52:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:48,334 INFO L470 AbstractCegarLoop]: Abstraction has 18212 states and 25657 transitions. [2021-12-17 20:52:48,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 18212 states and 25657 transitions. [2021-12-17 20:52:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:48,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:48,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:48,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 20:52:48,340 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2021-12-17 20:52:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484846848] [2021-12-17 20:52:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:48,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 20:52:48,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484846848] [2021-12-17 20:52:48,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484846848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:48,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:48,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:48,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39670947] [2021-12-17 20:52:48,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:48,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:48,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:48,402 INFO L87 Difference]: Start difference. First operand 18212 states and 25657 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2021-12-17 20:52:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:49,447 INFO L93 Difference]: Finished difference Result 34544 states and 48703 transitions. [2021-12-17 20:52:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:49,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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 95 [2021-12-17 20:52:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:49,492 INFO L225 Difference]: With dead ends: 34544 [2021-12-17 20:52:49,492 INFO L226 Difference]: Without dead ends: 31070 [2021-12-17 20:52:49,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:49,504 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6494 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6494 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:49,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6494 Valid, 3610 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31070 states. [2021-12-17 20:52:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31070 to 21684. [2021-12-17 20:52:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21684 states, 21682 states have (on average 1.4069274052209206) internal successors, (30505), 21683 states have internal predecessors, (30505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21684 states to 21684 states and 30505 transitions. [2021-12-17 20:52:50,390 INFO L78 Accepts]: Start accepts. Automaton has 21684 states and 30505 transitions. Word has length 95 [2021-12-17 20:52:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:50,390 INFO L470 AbstractCegarLoop]: Abstraction has 21684 states and 30505 transitions. [2021-12-17 20:52:50,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2021-12-17 20:52:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21684 states and 30505 transitions. [2021-12-17 20:52:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:50,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:50,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:50,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 20:52:50,397 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2021-12-17 20:52:50,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:50,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885290190] [2021-12-17 20:52:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:50,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 20:52:50,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885290190] [2021-12-17 20:52:50,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885290190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:50,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:50,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:50,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738945528] [2021-12-17 20:52:50,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:50,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:50,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:50,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:50,475 INFO L87 Difference]: Start difference. First operand 21684 states and 30505 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 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) [2021-12-17 20:52:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:52,030 INFO L93 Difference]: Finished difference Result 38016 states and 53551 transitions. [2021-12-17 20:52:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 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 95 [2021-12-17 20:52:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:52,079 INFO L225 Difference]: With dead ends: 38016 [2021-12-17 20:52:52,079 INFO L226 Difference]: Without dead ends: 34542 [2021-12-17 20:52:52,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:52,099 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 6562 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6562 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:52,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6562 Valid, 3614 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34542 states. [2021-12-17 20:52:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34542 to 25156. [2021-12-17 20:52:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25156 states, 25154 states have (on average 1.4054623519122207) internal successors, (35353), 25155 states have internal predecessors, (35353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25156 states to 25156 states and 35353 transitions. [2021-12-17 20:52:53,282 INFO L78 Accepts]: Start accepts. Automaton has 25156 states and 35353 transitions. Word has length 95 [2021-12-17 20:52:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:53,283 INFO L470 AbstractCegarLoop]: Abstraction has 25156 states and 35353 transitions. [2021-12-17 20:52:53,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 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) [2021-12-17 20:52:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 25156 states and 35353 transitions. [2021-12-17 20:52:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:53,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:53,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:53,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 20:52:53,289 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2021-12-17 20:52:53,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:53,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990903588] [2021-12-17 20:52:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:53,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:52:53,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990903588] [2021-12-17 20:52:53,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990903588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:53,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:53,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:53,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124357788] [2021-12-17 20:52:53,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:53,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:53,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:53,357 INFO L87 Difference]: Start difference. First operand 25156 states and 35353 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:54,705 INFO L93 Difference]: Finished difference Result 39408 states and 55519 transitions. [2021-12-17 20:52:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 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 95 [2021-12-17 20:52:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:54,757 INFO L225 Difference]: With dead ends: 39408 [2021-12-17 20:52:54,757 INFO L226 Difference]: Without dead ends: 36974 [2021-12-17 20:52:54,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:54,770 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 6561 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6561 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:54,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6561 Valid, 3543 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36974 states. [2021-12-17 20:52:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36974 to 27588. [2021-12-17 20:52:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27588 states, 27586 states have (on average 1.4056767925759444) internal successors, (38777), 27587 states have internal predecessors, (38777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27588 states to 27588 states and 38777 transitions. [2021-12-17 20:52:56,025 INFO L78 Accepts]: Start accepts. Automaton has 27588 states and 38777 transitions. Word has length 95 [2021-12-17 20:52:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:56,025 INFO L470 AbstractCegarLoop]: Abstraction has 27588 states and 38777 transitions. [2021-12-17 20:52:56,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 27588 states and 38777 transitions. [2021-12-17 20:52:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 20:52:56,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:56,032 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:52:56,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 20:52:56,032 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2021-12-17 20:52:56,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774945914] [2021-12-17 20:52:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:56,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:56,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:56,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774945914] [2021-12-17 20:52:56,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774945914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:52:56,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229004777] [2021-12-17 20:52:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:56,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:52:56,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:52:56,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:52:56,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 20:52:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 20:52:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:52:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:56,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:52:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229004777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:52:57,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:52:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-17 20:52:57,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272204442] [2021-12-17 20:52:57,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:52:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 20:52:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 20:52:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-17 20:52:57,289 INFO L87 Difference]: Start difference. First operand 27588 states and 38777 transitions. Second operand has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:19,910 INFO L93 Difference]: Finished difference Result 303134 states and 420406 transitions. [2021-12-17 20:53:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-12-17 20:53:19,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 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 96 [2021-12-17 20:53:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:20,577 INFO L225 Difference]: With dead ends: 303134 [2021-12-17 20:53:20,578 INFO L226 Difference]: Without dead ends: 279440 [2021-12-17 20:53:20,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23345 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7066, Invalid=45604, Unknown=0, NotChecked=0, Total=52670 [2021-12-17 20:53:20,680 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 25766 mSDsluCounter, 11766 mSDsCounter, 0 mSdLazyCounter, 5064 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25766 SdHoareTripleChecker+Valid, 13529 SdHoareTripleChecker+Invalid, 5907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 5064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:20,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25766 Valid, 13529 Invalid, 5907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 5064 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 20:53:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279440 states. [2021-12-17 20:53:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279440 to 177268. [2021-12-17 20:53:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177268 states, 177266 states have (on average 1.3759040086649441) internal successors, (243901), 177267 states have internal predecessors, (243901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177268 states to 177268 states and 243901 transitions. [2021-12-17 20:53:32,819 INFO L78 Accepts]: Start accepts. Automaton has 177268 states and 243901 transitions. Word has length 96 [2021-12-17 20:53:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:32,820 INFO L470 AbstractCegarLoop]: Abstraction has 177268 states and 243901 transitions. [2021-12-17 20:53:32,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 177268 states and 243901 transitions. [2021-12-17 20:53:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 20:53:32,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:32,830 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] [2021-12-17 20:53:32,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 20:53:33,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 20:53:33,056 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1408959169, now seen corresponding path program 1 times [2021-12-17 20:53:33,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:33,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798449086] [2021-12-17 20:53:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:33,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:33,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:33,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798449086] [2021-12-17 20:53:33,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798449086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:53:33,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986439879] [2021-12-17 20:53:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:33,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:53:33,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:53:33,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:53:33,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 20:53:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 20:53:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:53:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:34,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:53:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:34,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986439879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:53:34,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:53:34,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-17 20:53:34,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123586710] [2021-12-17 20:53:34,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:53:34,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 20:53:34,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 20:53:34,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-17 20:53:34,892 INFO L87 Difference]: Start difference. First operand 177268 states and 243901 transitions. Second operand has 23 states, 23 states have (on average 9.782608695652174) internal successors, (225), 22 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)