./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.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 fa5f95a04d6083abdc8e62e4666afd780988fdaed849d97770096c71104c7886 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:11:33,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:11:33,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:11:33,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:11:33,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:11:33,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:11:33,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:11:33,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:11:33,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:11:33,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:11:33,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:11:33,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:11:33,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:11:33,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:11:33,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:11:33,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:11:33,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:11:33,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:11:33,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:11:33,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:11:33,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:11:33,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:11:33,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:11:33,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:11:33,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:11:33,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:11:33,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:11:33,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:11:33,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:11:33,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:11:33,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:11:33,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:11:33,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:11:33,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:11:33,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:11:33,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:11:33,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:11:34,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:11:34,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:11:34,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:11:34,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:11:34,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:11:34,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:11:34,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:11:34,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:11:34,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:11:34,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:11:34,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:11:34,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:11:34,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:11:34,023 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:11:34,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:11:34,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:11:34,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:11:34,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:11:34,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:11:34,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:11:34,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:11:34,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:11:34,025 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:11:34,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:11:34,025 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:11:34,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:11:34,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:11:34,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:11:34,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:11:34,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:11:34,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:11:34,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:11:34,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:11:34,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:11:34,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:11:34,027 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:11:34,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:11:34,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:11:34,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:11:34,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa5f95a04d6083abdc8e62e4666afd780988fdaed849d97770096c71104c7886 [2021-12-14 16:11:34,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:11:34,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:11:34,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:11:34,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:11:34,248 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:11:34,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c [2021-12-14 16:11:34,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eacc9deb/8764b5b233d34de980f406abc1fe263f/FLAG450fa1e8c [2021-12-14 16:11:34,865 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:11:34,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c [2021-12-14 16:11:34,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eacc9deb/8764b5b233d34de980f406abc1fe263f/FLAG450fa1e8c [2021-12-14 16:11:35,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eacc9deb/8764b5b233d34de980f406abc1fe263f [2021-12-14 16:11:35,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:11:35,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:11:35,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:11:35,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:11:35,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:11:35,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:11:35" (1/1) ... [2021-12-14 16:11:35,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e011a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:35, skipping insertion in model container [2021-12-14 16:11:35,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:11:35" (1/1) ... [2021-12-14 16:11:35,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:11:35,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:11:35,681 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.7.ufo.BOUNDED-14.pals+Problem12_label08.c[20426,20439] [2021-12-14 16:11:35,712 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.7.ufo.BOUNDED-14.pals+Problem12_label08.c[23933,23946] [2021-12-14 16:11:36,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:11:36,239 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:11:36,305 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.7.ufo.BOUNDED-14.pals+Problem12_label08.c[20426,20439] [2021-12-14 16:11:36,308 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.7.ufo.BOUNDED-14.pals+Problem12_label08.c[23933,23946] [2021-12-14 16:11:36,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:11:36,611 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:11:36,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36 WrapperNode [2021-12-14 16:11:36,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:11:36,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:11:36,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:11:36,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:11:36,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:36,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:36,864 INFO L137 Inliner]: procedures = 38, calls = 24, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 5210 [2021-12-14 16:11:36,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:11:36,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:11:36,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:11:36,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:11:36,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:36,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:36,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:36,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:37,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:37,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:37,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:37,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:11:37,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:11:37,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:11:37,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:11:37,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (1/1) ... [2021-12-14 16:11:37,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:11:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:11:37,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:11:37,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:11:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:11:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:11:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:11:37,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:11:37,513 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:11:37,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:11:40,172 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:11:40,185 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:11:40,185 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:11:40,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:11:40 BoogieIcfgContainer [2021-12-14 16:11:40,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:11:40,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:11:40,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:11:40,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:11:40,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:11:35" (1/3) ... [2021-12-14 16:11:40,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416dfe74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:11:40, skipping insertion in model container [2021-12-14 16:11:40,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:36" (2/3) ... [2021-12-14 16:11:40,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416dfe74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:11:40, skipping insertion in model container [2021-12-14 16:11:40,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:11:40" (3/3) ... [2021-12-14 16:11:40,194 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c [2021-12-14 16:11:40,197 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:11:40,198 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:11:40,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:11:40,236 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:11:40,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:11:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 944 states, 941 states have (on average 1.8979808714133901) internal successors, (1786), 943 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 16:11:40,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:40,272 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] [2021-12-14 16:11:40,272 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash -553137427, now seen corresponding path program 1 times [2021-12-14 16:11:40,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:40,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969451202] [2021-12-14 16:11:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:40,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:40,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969451202] [2021-12-14 16:11:40,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969451202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:40,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:40,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:11:40,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111958637] [2021-12-14 16:11:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:40,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:40,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:40,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:40,522 INFO L87 Difference]: Start difference. First operand has 944 states, 941 states have (on average 1.8979808714133901) internal successors, (1786), 943 states have internal predecessors, (1786), 0 states have call successors, (0), 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 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:43,312 INFO L93 Difference]: Finished difference Result 2587 states and 4966 transitions. [2021-12-14 16:11:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:43,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-14 16:11:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:43,340 INFO L225 Difference]: With dead ends: 2587 [2021-12-14 16:11:43,340 INFO L226 Difference]: Without dead ends: 1629 [2021-12-14 16:11:43,347 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 [2021-12-14 16:11:43,349 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 1085 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:43,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 375 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 16:11:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-12-14 16:11:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2021-12-14 16:11:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1627 states have (on average 1.8389674247080516) internal successors, (2992), 1628 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2992 transitions. [2021-12-14 16:11:43,445 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2992 transitions. Word has length 30 [2021-12-14 16:11:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:43,445 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 2992 transitions. [2021-12-14 16:11:43,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2992 transitions. [2021-12-14 16:11:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 16:11:43,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:43,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:43,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:11:43,451 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2021-12-14 16:11:43,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:43,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026886827] [2021-12-14 16:11:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:43,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:43,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026886827] [2021-12-14 16:11:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026886827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:43,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:43,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:11:43,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498737239] [2021-12-14 16:11:43,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:43,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:11:43,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:11:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:11:43,600 INFO L87 Difference]: Start difference. First operand 1629 states and 2992 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:43,695 INFO L93 Difference]: Finished difference Result 1701 states and 3104 transitions. [2021-12-14 16:11:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:11:43,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-14 16:11:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:43,701 INFO L225 Difference]: With dead ends: 1701 [2021-12-14 16:11:43,701 INFO L226 Difference]: Without dead ends: 1629 [2021-12-14 16:11:43,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:11:43,702 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 3 mSDsluCounter, 4900 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6551 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:43,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6551 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-12-14 16:11:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2021-12-14 16:11:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1627 states have (on average 1.8082360172095882) internal successors, (2942), 1628 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2942 transitions. [2021-12-14 16:11:43,727 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2942 transitions. Word has length 42 [2021-12-14 16:11:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:43,727 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 2942 transitions. [2021-12-14 16:11:43,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2942 transitions. [2021-12-14 16:11:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:11:43,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:43,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:43,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:11:43,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2021-12-14 16:11:43,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:43,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237728564] [2021-12-14 16:11:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:43,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:43,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237728564] [2021-12-14 16:11:43,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237728564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:43,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:43,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:43,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017257630] [2021-12-14 16:11:43,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:43,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:43,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:43,808 INFO L87 Difference]: Start difference. First operand 1629 states and 2942 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:43,834 INFO L93 Difference]: Finished difference Result 1759 states and 3148 transitions. [2021-12-14 16:11:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 91 [2021-12-14 16:11:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:43,840 INFO L225 Difference]: With dead ends: 1759 [2021-12-14 16:11:43,841 INFO L226 Difference]: Without dead ends: 1691 [2021-12-14 16:11:43,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:43,846 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 1537 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:43,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1803 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-12-14 16:11:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1689. [2021-12-14 16:11:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1687 states have (on average 1.8008298755186722) internal successors, (3038), 1688 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 3038 transitions. [2021-12-14 16:11:43,877 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 3038 transitions. Word has length 91 [2021-12-14 16:11:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:43,879 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 3038 transitions. [2021-12-14 16:11:43,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 3038 transitions. [2021-12-14 16:11:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:11:43,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:43,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:43,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:11:43,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2021-12-14 16:11:43,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:43,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439719210] [2021-12-14 16:11:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:43,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:43,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:43,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439719210] [2021-12-14 16:11:43,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439719210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:43,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:43,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:43,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531610722] [2021-12-14 16:11:43,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:43,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:43,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:43,981 INFO L87 Difference]: Start difference. First operand 1689 states and 3038 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:44,010 INFO L93 Difference]: Finished difference Result 1933 states and 3426 transitions. [2021-12-14 16:11:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 91 [2021-12-14 16:11:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:44,016 INFO L225 Difference]: With dead ends: 1933 [2021-12-14 16:11:44,017 INFO L226 Difference]: Without dead ends: 1805 [2021-12-14 16:11:44,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:44,023 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 1533 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:44,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 1802 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-12-14 16:11:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2021-12-14 16:11:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1801 states have (on average 1.787340366463076) internal successors, (3219), 1802 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3219 transitions. [2021-12-14 16:11:44,060 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3219 transitions. Word has length 91 [2021-12-14 16:11:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:44,061 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3219 transitions. [2021-12-14 16:11:44,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3219 transitions. [2021-12-14 16:11:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:11:44,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:44,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:44,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:11:44,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2021-12-14 16:11:44,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:44,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808689811] [2021-12-14 16:11:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:44,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:44,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:44,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808689811] [2021-12-14 16:11:44,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808689811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:44,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:44,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469046463] [2021-12-14 16:11:44,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:44,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:44,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:44,130 INFO L87 Difference]: Start difference. First operand 1803 states and 3219 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:44,166 INFO L93 Difference]: Finished difference Result 2263 states and 3949 transitions. [2021-12-14 16:11:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 91 [2021-12-14 16:11:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:44,175 INFO L225 Difference]: With dead ends: 2263 [2021-12-14 16:11:44,176 INFO L226 Difference]: Without dead ends: 2021 [2021-12-14 16:11:44,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:44,177 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 1529 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:44,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1801 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-12-14 16:11:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 2019. [2021-12-14 16:11:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2017 states have (on average 1.7645017352503718) internal successors, (3559), 2018 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3559 transitions. [2021-12-14 16:11:44,220 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3559 transitions. Word has length 91 [2021-12-14 16:11:44,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:44,223 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 3559 transitions. [2021-12-14 16:11:44,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3559 transitions. [2021-12-14 16:11:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:11:44,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:44,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:44,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:11:44,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:44,233 INFO L85 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2021-12-14 16:11:44,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:44,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075164006] [2021-12-14 16:11:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:44,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:44,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:44,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075164006] [2021-12-14 16:11:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075164006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:44,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:44,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:44,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166659227] [2021-12-14 16:11:44,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:44,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:44,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:44,290 INFO L87 Difference]: Start difference. First operand 2019 states and 3559 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:44,321 INFO L93 Difference]: Finished difference Result 2887 states and 4929 transitions. [2021-12-14 16:11:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 91 [2021-12-14 16:11:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:44,330 INFO L225 Difference]: With dead ends: 2887 [2021-12-14 16:11:44,331 INFO L226 Difference]: Without dead ends: 2429 [2021-12-14 16:11:44,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:44,333 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 1525 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:44,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1800 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-12-14 16:11:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2427. [2021-12-14 16:11:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2425 states have (on average 1.729896907216495) internal successors, (4195), 2426 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 4195 transitions. [2021-12-14 16:11:44,382 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 4195 transitions. Word has length 91 [2021-12-14 16:11:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:44,384 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 4195 transitions. [2021-12-14 16:11:44,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 4195 transitions. [2021-12-14 16:11:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:11:44,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:44,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:44,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:11:44,385 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2021-12-14 16:11:44,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:44,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124029297] [2021-12-14 16:11:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:44,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:44,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124029297] [2021-12-14 16:11:44,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124029297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:44,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:44,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:44,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281552936] [2021-12-14 16:11:44,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:44,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:44,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:44,438 INFO L87 Difference]: Start difference. First operand 2427 states and 4195 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:44,480 INFO L93 Difference]: Finished difference Result 4063 states and 6757 transitions. [2021-12-14 16:11:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 91 [2021-12-14 16:11:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:44,490 INFO L225 Difference]: With dead ends: 4063 [2021-12-14 16:11:44,491 INFO L226 Difference]: Without dead ends: 3197 [2021-12-14 16:11:44,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:44,493 INFO L933 BasicCegarLoop]: 1677 mSDtfsCounter, 1521 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:44,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 1799 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-12-14 16:11:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3195. [2021-12-14 16:11:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3193 states have (on average 1.6846226119636705) internal successors, (5379), 3194 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 5379 transitions. [2021-12-14 16:11:44,556 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 5379 transitions. Word has length 91 [2021-12-14 16:11:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:44,556 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 5379 transitions. [2021-12-14 16:11:44,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2021-12-14 16:11:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 5379 transitions. [2021-12-14 16:11:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:11:44,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:44,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:44,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:11:44,579 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2021-12-14 16:11:44,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:44,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757202064] [2021-12-14 16:11:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:44,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:44,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757202064] [2021-12-14 16:11:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757202064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:44,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:44,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:11:44,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44263886] [2021-12-14 16:11:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:44,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:11:44,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:11:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:11:44,657 INFO L87 Difference]: Start difference. First operand 3195 states and 5379 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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) [2021-12-14 16:11:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:45,302 INFO L93 Difference]: Finished difference Result 26071 states and 41009 transitions. [2021-12-14 16:11:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:11:45,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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 91 [2021-12-14 16:11:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:45,371 INFO L225 Difference]: With dead ends: 26071 [2021-12-14 16:11:45,371 INFO L226 Difference]: Without dead ends: 24437 [2021-12-14 16:11:45,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:11:45,382 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 13389 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13389 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:45,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13389 Valid, 3111 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:11:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24437 states. [2021-12-14 16:11:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24437 to 4827. [2021-12-14 16:11:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4825 states have (on average 1.6288082901554404) internal successors, (7859), 4826 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 7859 transitions. [2021-12-14 16:11:45,694 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 7859 transitions. Word has length 91 [2021-12-14 16:11:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:45,695 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 7859 transitions. [2021-12-14 16:11:45,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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) [2021-12-14 16:11:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 7859 transitions. [2021-12-14 16:11:45,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:11:45,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:45,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:45,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:11:45,697 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:45,698 INFO L85 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2021-12-14 16:11:45,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:45,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6984608] [2021-12-14 16:11:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:45,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:45,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:45,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6984608] [2021-12-14 16:11:45,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6984608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:45,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:45,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:45,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58114567] [2021-12-14 16:11:45,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:45,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:45,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:45,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:45,735 INFO L87 Difference]: Start difference. First operand 4827 states and 7859 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-14 16:11:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:45,889 INFO L93 Difference]: Finished difference Result 9649 states and 15271 transitions. [2021-12-14 16:11:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:45,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 [2021-12-14 16:11:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:45,899 INFO L225 Difference]: With dead ends: 9649 [2021-12-14 16:11:45,900 INFO L226 Difference]: Without dead ends: 6383 [2021-12-14 16:11:45,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:45,906 INFO L933 BasicCegarLoop]: 1632 mSDtfsCounter, 1505 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 1735 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 [2021-12-14 16:11:45,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 1735 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-12-14 16:11:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6381. [2021-12-14 16:11:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6381 states, 6379 states have (on average 1.5985264147985578) internal successors, (10197), 6380 states have internal predecessors, (10197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 10197 transitions. [2021-12-14 16:11:46,116 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 10197 transitions. Word has length 93 [2021-12-14 16:11:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:46,116 INFO L470 AbstractCegarLoop]: Abstraction has 6381 states and 10197 transitions. [2021-12-14 16:11:46,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-14 16:11:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 10197 transitions. [2021-12-14 16:11:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:11:46,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:46,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:46,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:11:46,117 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2021-12-14 16:11:46,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:46,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488885661] [2021-12-14 16:11:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:46,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:46,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:46,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488885661] [2021-12-14 16:11:46,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488885661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:46,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:46,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:11:46,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8680576] [2021-12-14 16:11:46,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:46,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:11:46,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:46,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:11:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:11:46,305 INFO L87 Difference]: Start difference. First operand 6381 states and 10197 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2021-12-14 16:11:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:46,674 INFO L93 Difference]: Finished difference Result 11201 states and 17559 transitions. [2021-12-14 16:11:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:11:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 [2021-12-14 16:11:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:46,686 INFO L225 Difference]: With dead ends: 11201 [2021-12-14 16:11:46,687 INFO L226 Difference]: Without dead ends: 6383 [2021-12-14 16:11:46,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:11:46,693 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 4932 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4932 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:46,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4932 Valid, 2282 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:11:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-12-14 16:11:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6381. [2021-12-14 16:11:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6381 states, 6379 states have (on average 1.5910017244082144) internal successors, (10149), 6380 states have internal predecessors, (10149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 10149 transitions. [2021-12-14 16:11:46,857 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 10149 transitions. Word has length 93 [2021-12-14 16:11:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:46,857 INFO L470 AbstractCegarLoop]: Abstraction has 6381 states and 10149 transitions. [2021-12-14 16:11:46,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2021-12-14 16:11:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 10149 transitions. [2021-12-14 16:11:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:11:46,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:46,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:46,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:11:46,858 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:46,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2021-12-14 16:11:46,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589980298] [2021-12-14 16:11:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:46,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:46,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:46,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589980298] [2021-12-14 16:11:46,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589980298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:46,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:46,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:46,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709133624] [2021-12-14 16:11:46,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:46,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:46,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:46,888 INFO L87 Difference]: Start difference. First operand 6381 states and 10149 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-14 16:11:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:47,106 INFO L93 Difference]: Finished difference Result 15441 states and 23815 transitions. [2021-12-14 16:11:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 [2021-12-14 16:11:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:47,122 INFO L225 Difference]: With dead ends: 15441 [2021-12-14 16:11:47,122 INFO L226 Difference]: Without dead ends: 10623 [2021-12-14 16:11:47,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:47,129 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 1513 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:47,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1789 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10623 states. [2021-12-14 16:11:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10623 to 10621. [2021-12-14 16:11:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10621 states, 10619 states have (on average 1.5448723985309352) internal successors, (16405), 10620 states have internal predecessors, (16405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10621 states to 10621 states and 16405 transitions. [2021-12-14 16:11:47,453 INFO L78 Accepts]: Start accepts. Automaton has 10621 states and 16405 transitions. Word has length 93 [2021-12-14 16:11:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:47,454 INFO L470 AbstractCegarLoop]: Abstraction has 10621 states and 16405 transitions. [2021-12-14 16:11:47,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-14 16:11:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10621 states and 16405 transitions. [2021-12-14 16:11:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:11:47,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:47,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:47,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:11:47,455 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2021-12-14 16:11:47,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150145145] [2021-12-14 16:11:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:47,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:47,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:47,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150145145] [2021-12-14 16:11:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150145145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:47,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:47,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:47,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691032866] [2021-12-14 16:11:47,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:47,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:47,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:47,485 INFO L87 Difference]: Start difference. First operand 10621 states and 16405 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-14 16:11:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:47,899 INFO L93 Difference]: Finished difference Result 27585 states and 41623 transitions. [2021-12-14 16:11:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:11:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 [2021-12-14 16:11:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:47,931 INFO L225 Difference]: With dead ends: 27585 [2021-12-14 16:11:47,931 INFO L226 Difference]: Without dead ends: 18527 [2021-12-14 16:11:47,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:47,949 INFO L933 BasicCegarLoop]: 1672 mSDtfsCounter, 1517 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:47,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 1798 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18527 states. [2021-12-14 16:11:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18527 to 18525. [2021-12-14 16:11:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18525 states, 18523 states have (on average 1.5041300005398694) internal successors, (27861), 18524 states have internal predecessors, (27861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27861 transitions. [2021-12-14 16:11:48,634 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27861 transitions. Word has length 93 [2021-12-14 16:11:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:48,634 INFO L470 AbstractCegarLoop]: Abstraction has 18525 states and 27861 transitions. [2021-12-14 16:11:48,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-14 16:11:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27861 transitions. [2021-12-14 16:11:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 16:11:48,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:48,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:48,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:11:48,635 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2021-12-14 16:11:48,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550068184] [2021-12-14 16:11:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:48,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:48,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:48,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550068184] [2021-12-14 16:11:48,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550068184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:48,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:48,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:11:48,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861160049] [2021-12-14 16:11:48,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:48,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:11:48,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:48,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:11:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:11:48,682 INFO L87 Difference]: Start difference. First operand 18525 states and 27861 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 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) [2021-12-14 16:11:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:49,252 INFO L93 Difference]: Finished difference Result 35487 states and 52886 transitions. [2021-12-14 16:11:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:11:49,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 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 94 [2021-12-14 16:11:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:49,282 INFO L225 Difference]: With dead ends: 35487 [2021-12-14 16:11:49,283 INFO L226 Difference]: Without dead ends: 18525 [2021-12-14 16:11:49,301 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 [2021-12-14 16:11:49,302 INFO L933 BasicCegarLoop]: 1560 mSDtfsCounter, 4912 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4912 SdHoareTripleChecker+Valid, 3091 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:49,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4912 Valid, 3091 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:11:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2021-12-14 16:11:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 18525. [2021-12-14 16:11:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18525 states, 18523 states have (on average 1.4903093451384766) internal successors, (27605), 18524 states have internal predecessors, (27605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27605 transitions. [2021-12-14 16:11:49,913 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27605 transitions. Word has length 94 [2021-12-14 16:11:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:49,913 INFO L470 AbstractCegarLoop]: Abstraction has 18525 states and 27605 transitions. [2021-12-14 16:11:49,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 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) [2021-12-14 16:11:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27605 transitions. [2021-12-14 16:11:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 16:11:49,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:49,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:49,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:11:49,914 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2021-12-14 16:11:49,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:49,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783828474] [2021-12-14 16:11:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:49,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:49,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783828474] [2021-12-14 16:11:49,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783828474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:49,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:49,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:11:49,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065506466] [2021-12-14 16:11:49,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:49,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:11:49,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:11:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:11:49,955 INFO L87 Difference]: Start difference. First operand 18525 states and 27605 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 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) [2021-12-14 16:11:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:50,538 INFO L93 Difference]: Finished difference Result 35487 states and 52374 transitions. [2021-12-14 16:11:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:11:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 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 94 [2021-12-14 16:11:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:50,565 INFO L225 Difference]: With dead ends: 35487 [2021-12-14 16:11:50,566 INFO L226 Difference]: Without dead ends: 18525 [2021-12-14 16:11:50,583 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 [2021-12-14 16:11:50,583 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 4872 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4872 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:50,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4872 Valid, 3090 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:11:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2021-12-14 16:11:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 18525. [2021-12-14 16:11:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18525 states, 18523 states have (on average 1.4799438535874319) internal successors, (27413), 18524 states have internal predecessors, (27413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27413 transitions. [2021-12-14 16:11:51,383 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27413 transitions. Word has length 94 [2021-12-14 16:11:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:51,384 INFO L470 AbstractCegarLoop]: Abstraction has 18525 states and 27413 transitions. [2021-12-14 16:11:51,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 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) [2021-12-14 16:11:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27413 transitions. [2021-12-14 16:11:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 16:11:51,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:51,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:51,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:11:51,387 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2021-12-14 16:11:51,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:51,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892748635] [2021-12-14 16:11:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:51,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:51,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892748635] [2021-12-14 16:11:51,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892748635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:51,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:51,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:11:51,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223823015] [2021-12-14 16:11:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:51,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:11:51,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:11:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:11:51,465 INFO L87 Difference]: Start difference. First operand 18525 states and 27413 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2021-12-14 16:11:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:52,568 INFO L93 Difference]: Finished difference Result 33024 states and 48063 transitions. [2021-12-14 16:11:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:11:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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 94 [2021-12-14 16:11:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:52,619 INFO L225 Difference]: With dead ends: 33024 [2021-12-14 16:11:52,620 INFO L226 Difference]: Without dead ends: 33022 [2021-12-14 16:11:52,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:11:52,633 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 289 mSDsluCounter, 4796 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 6432 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:52,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 6432 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:11:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33022 states. [2021-12-14 16:11:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33022 to 19293. [2021-12-14 16:11:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19293 states, 19291 states have (on average 1.457519050334353) internal successors, (28117), 19292 states have internal predecessors, (28117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 28117 transitions. [2021-12-14 16:11:53,437 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 28117 transitions. Word has length 94 [2021-12-14 16:11:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 19293 states and 28117 transitions. [2021-12-14 16:11:53,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2021-12-14 16:11:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 28117 transitions. [2021-12-14 16:11:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 16:11:53,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:53,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:11:53,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:11:53,439 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1705798067, now seen corresponding path program 1 times [2021-12-14 16:11:53,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700724891] [2021-12-14 16:11:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:53,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:11:53,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:53,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700724891] [2021-12-14 16:11:53,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700724891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:53,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:53,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:11:53,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190720726] [2021-12-14 16:11:53,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:53,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:11:53,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:53,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:11:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:11:53,484 INFO L87 Difference]: Start difference. First operand 19293 states and 28117 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:11:58,239 INFO L93 Difference]: Finished difference Result 23050 states and 35007 transitions. [2021-12-14 16:11:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:11:58,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-14 16:11:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:11:58,267 INFO L225 Difference]: With dead ends: 23050 [2021-12-14 16:11:58,267 INFO L226 Difference]: Without dead ends: 21546 [2021-12-14 16:11:58,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:11:58,276 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 2483 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4805 mSolverCounterSat, 1138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2483 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 5943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 4805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:11:58,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2483 Valid, 876 Invalid, 5943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1138 Valid, 4805 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-14 16:11:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21546 states. [2021-12-14 16:11:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21546 to 21546. [2021-12-14 16:11:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21546 states, 21544 states have (on average 1.425269216487189) internal successors, (30706), 21545 states have internal predecessors, (30706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 30706 transitions. [2021-12-14 16:11:59,239 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 30706 transitions. Word has length 99 [2021-12-14 16:11:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:11:59,239 INFO L470 AbstractCegarLoop]: Abstraction has 21546 states and 30706 transitions. [2021-12-14 16:11:59,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:11:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 30706 transitions. [2021-12-14 16:11:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:11:59,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:11:59,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 16:11:59,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:11:59,241 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:11:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:11:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash -9059566, now seen corresponding path program 1 times [2021-12-14 16:11:59,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:11:59,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212533471] [2021-12-14 16:11:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:11:59,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:11:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:11:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 16:11:59,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:11:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212533471] [2021-12-14 16:11:59,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212533471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:11:59,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:11:59,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:11:59,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482406825] [2021-12-14 16:11:59,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:11:59,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:11:59,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:11:59,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:11:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:11:59,288 INFO L87 Difference]: Start difference. First operand 21546 states and 30706 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:12:02,430 INFO L93 Difference]: Finished difference Result 26054 states and 38089 transitions. [2021-12-14 16:12:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:12:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-14 16:12:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:12:02,457 INFO L225 Difference]: With dead ends: 26054 [2021-12-14 16:12:02,457 INFO L226 Difference]: Without dead ends: 23048 [2021-12-14 16:12:02,463 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 [2021-12-14 16:12:02,464 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 887 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:12:02,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 636 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 16:12:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23048 states. [2021-12-14 16:12:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23048 to 23048. [2021-12-14 16:12:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23048 states, 23046 states have (on average 1.415777141369435) internal successors, (32628), 23047 states have internal predecessors, (32628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23048 states to 23048 states and 32628 transitions. [2021-12-14 16:12:03,238 INFO L78 Accepts]: Start accepts. Automaton has 23048 states and 32628 transitions. Word has length 101 [2021-12-14 16:12:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:12:03,238 INFO L470 AbstractCegarLoop]: Abstraction has 23048 states and 32628 transitions. [2021-12-14 16:12:03,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23048 states and 32628 transitions. [2021-12-14 16:12:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 16:12:03,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:12:03,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:12:03,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:12:03,247 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:12:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:12:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2021-12-14 16:12:03,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:12:03,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187343409] [2021-12-14 16:12:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:12:03,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:12:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:12:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:12:03,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:12:03,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187343409] [2021-12-14 16:12:03,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187343409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:12:03,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:12:03,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:12:03,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098199338] [2021-12-14 16:12:03,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:12:03,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:12:03,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:12:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:12:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:12:03,316 INFO L87 Difference]: Start difference. First operand 23048 states and 32628 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:12:08,013 INFO L93 Difference]: Finished difference Result 150616 states and 214364 transitions. [2021-12-14 16:12:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:12:08,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 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 130 [2021-12-14 16:12:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:12:08,204 INFO L225 Difference]: With dead ends: 150616 [2021-12-14 16:12:08,204 INFO L226 Difference]: Without dead ends: 132886 [2021-12-14 16:12:08,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:12:08,239 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 10767 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10767 SdHoareTripleChecker+Valid, 4089 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:12:08,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10767 Valid, 4089 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:12:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132886 states. [2021-12-14 16:12:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132886 to 40776. [2021-12-14 16:12:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40776 states, 40774 states have (on average 1.4155098837494482) internal successors, (57716), 40775 states have internal predecessors, (57716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40776 states to 40776 states and 57716 transitions. [2021-12-14 16:12:10,751 INFO L78 Accepts]: Start accepts. Automaton has 40776 states and 57716 transitions. Word has length 130 [2021-12-14 16:12:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:12:10,752 INFO L470 AbstractCegarLoop]: Abstraction has 40776 states and 57716 transitions. [2021-12-14 16:12:10,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40776 states and 57716 transitions. [2021-12-14 16:12:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 16:12:10,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:12:10,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:12:10,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:12:10,763 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:12:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:12:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2021-12-14 16:12:10,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:12:10,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551668855] [2021-12-14 16:12:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:12:10,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:12:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:12:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 16:12:11,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:12:11,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551668855] [2021-12-14 16:12:11,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551668855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:12:11,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:12:11,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:12:11,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360179479] [2021-12-14 16:12:11,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:12:11,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:12:11,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:12:11,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:12:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:12:11,040 INFO L87 Difference]: Start difference. First operand 40776 states and 57716 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:12:17,533 INFO L93 Difference]: Finished difference Result 168344 states and 239452 transitions. [2021-12-14 16:12:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:12:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-12-14 16:12:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:12:17,756 INFO L225 Difference]: With dead ends: 168344 [2021-12-14 16:12:17,756 INFO L226 Difference]: Without dead ends: 150614 [2021-12-14 16:12:17,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:12:17,788 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 10520 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10520 SdHoareTripleChecker+Valid, 4141 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:12:17,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10520 Valid, 4141 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:12:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150614 states. [2021-12-14 16:12:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150614 to 67400. [2021-12-14 16:12:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67400 states, 67398 states have (on average 1.4123267752752307) internal successors, (95188), 67399 states have internal predecessors, (95188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67400 states to 67400 states and 95188 transitions. [2021-12-14 16:12:21,776 INFO L78 Accepts]: Start accepts. Automaton has 67400 states and 95188 transitions. Word has length 130 [2021-12-14 16:12:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:12:21,776 INFO L470 AbstractCegarLoop]: Abstraction has 67400 states and 95188 transitions. [2021-12-14 16:12:21,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 67400 states and 95188 transitions. [2021-12-14 16:12:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 16:12:21,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:12:21,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:12:21,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:12:21,788 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:12:21,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:12:21,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2021-12-14 16:12:21,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:12:21,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659031360] [2021-12-14 16:12:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:12:21,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:12:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:12:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:12:21,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:12:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659031360] [2021-12-14 16:12:21,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659031360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:12:21,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:12:21,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:12:21,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486299204] [2021-12-14 16:12:21,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:12:21,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:12:21,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:12:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:12:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:12:21,853 INFO L87 Difference]: Start difference. First operand 67400 states and 95188 transitions. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:12:29,573 INFO L93 Difference]: Finished difference Result 186072 states and 264540 transitions. [2021-12-14 16:12:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:12:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-12-14 16:12:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:12:29,846 INFO L225 Difference]: With dead ends: 186072 [2021-12-14 16:12:29,847 INFO L226 Difference]: Without dead ends: 168342 [2021-12-14 16:12:29,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:12:29,892 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 10439 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10439 SdHoareTripleChecker+Valid, 4191 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:12:29,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10439 Valid, 4191 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:12:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168342 states. [2021-12-14 16:12:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168342 to 85128. [2021-12-14 16:12:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85128 states, 85126 states have (on average 1.4129173225571505) internal successors, (120276), 85127 states have internal predecessors, (120276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85128 states to 85128 states and 120276 transitions. [2021-12-14 16:12:35,037 INFO L78 Accepts]: Start accepts. Automaton has 85128 states and 120276 transitions. Word has length 130 [2021-12-14 16:12:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:12:35,037 INFO L470 AbstractCegarLoop]: Abstraction has 85128 states and 120276 transitions. [2021-12-14 16:12:35,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:12:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 85128 states and 120276 transitions. [2021-12-14 16:12:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 16:12:35,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:12:35,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:12:35,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:12:35,049 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:12:35,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:12:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2021-12-14 16:12:35,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:12:35,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744513716] [2021-12-14 16:12:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:12:35,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:12:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:12:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:12:35,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:12:35,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744513716] [2021-12-14 16:12:35,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744513716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:12:35,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:12:35,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:12:35,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417691582] [2021-12-14 16:12:35,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:12:35,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:12:35,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:12:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:12:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:12:35,119 INFO L87 Difference]: Start difference. First operand 85128 states and 120276 transitions. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)