./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem14_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem14_label14.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 350ac91600d4c4390de9f3fc82ef0416828210bb98ae007abf94c777e2c55126 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:49:13,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:49:13,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:49:13,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:49:13,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:49:13,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:49:13,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:49:13,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:49:13,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:49:13,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:49:13,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:49:13,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:49:13,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:49:14,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:49:14,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:49:14,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:49:14,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:49:14,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:49:14,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:49:14,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:49:14,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:49:14,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:49:14,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:49:14,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:49:14,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:49:14,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:49:14,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:49:14,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:49:14,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:49:14,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:49:14,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:49:14,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:49:14,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:49:14,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:49:14,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:49:14,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:49:14,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:49:14,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:49:14,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:49:14,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:49:14,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:49:14,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:49:14,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:49:14,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:49:14,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:49:14,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:49:14,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:49:14,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:49:14,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:49:14,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:49:14,072 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:49:14,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:49:14,073 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:49:14,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:49:14,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:49:14,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:49:14,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:49:14,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:49:14,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:49:14,074 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:49:14,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:49:14,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:49:14,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:49:14,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:49:14,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:49:14,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:49:14,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:49:14,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:49:14,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:49:14,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:49:14,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:49:14,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:49:14,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:49:14,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:49:14,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:49:14,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:49:14,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 350ac91600d4c4390de9f3fc82ef0416828210bb98ae007abf94c777e2c55126 [2021-12-15 22:49:14,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:49:14,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:49:14,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:49:14,350 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:49:14,351 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:49:14,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label14.c [2021-12-15 22:49:14,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5e39171/8afb7d7df69c4c2683e5a65f94683b0b/FLAG7baa8aad5 [2021-12-15 22:49:14,877 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:49:14,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label14.c [2021-12-15 22:49:14,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5e39171/8afb7d7df69c4c2683e5a65f94683b0b/FLAG7baa8aad5 [2021-12-15 22:49:15,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5e39171/8afb7d7df69c4c2683e5a65f94683b0b [2021-12-15 22:49:15,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:49:15,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:49:15,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:49:15,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:49:15,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:49:15,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c82a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15, skipping insertion in model container [2021-12-15 22:49:15,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:49:15,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:49:15,483 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/eca-rers2012/Problem14_label14.c[2862,2875] [2021-12-15 22:49:15,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:49:15,696 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:49:15,723 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/eca-rers2012/Problem14_label14.c[2862,2875] [2021-12-15 22:49:15,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:49:15,832 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:49:15,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15 WrapperNode [2021-12-15 22:49:15,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:49:15,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:49:15,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:49:15,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:49:15,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,933 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-12-15 22:49:15,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:49:15,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:49:15,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:49:15,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:49:15,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:15,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:16,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:16,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:49:16,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:49:16,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:49:16,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:49:16,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (1/1) ... [2021-12-15 22:49:16,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:49:16,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:16,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:49:16,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:49:16,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:49:16,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:49:16,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:49:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:49:16,145 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:49:16,146 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:49:17,124 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:49:17,135 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:49:17,136 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:49:17,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:49:17 BoogieIcfgContainer [2021-12-15 22:49:17,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:49:17,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:49:17,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:49:17,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:49:17,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:49:15" (1/3) ... [2021-12-15 22:49:17,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c69125d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:49:17, skipping insertion in model container [2021-12-15 22:49:17,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:15" (2/3) ... [2021-12-15 22:49:17,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c69125d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:49:17, skipping insertion in model container [2021-12-15 22:49:17,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:49:17" (3/3) ... [2021-12-15 22:49:17,147 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2021-12-15 22:49:17,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:49:17,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:49:17,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:49:17,204 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:49:17,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:49:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 22:49:17,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:17,228 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] [2021-12-15 22:49:17,228 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2021-12-15 22:49:17,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:17,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716205803] [2021-12-15 22:49:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:17,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:49:17,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716205803] [2021-12-15 22:49:17,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716205803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:17,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:17,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:49:17,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293610605] [2021-12-15 22:49:17,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:17,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:17,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:17,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:17,504 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 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 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:18,507 INFO L93 Difference]: Finished difference Result 685 states and 1216 transitions. [2021-12-15 22:49:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-15 22:49:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:18,524 INFO L225 Difference]: With dead ends: 685 [2021-12-15 22:49:18,525 INFO L226 Difference]: Without dead ends: 360 [2021-12-15 22:49:18,528 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 [2021-12-15 22:49:18,531 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:18,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 139 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:49:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-15 22:49:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-12-15 22:49:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4206128133704736) internal successors, (510), 359 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2021-12-15 22:49:18,588 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 26 [2021-12-15 22:49:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:18,588 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2021-12-15 22:49:18,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2021-12-15 22:49:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 22:49:18,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:18,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:18,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:49:18,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash -256152627, now seen corresponding path program 1 times [2021-12-15 22:49:18,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:18,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333266563] [2021-12-15 22:49:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:18,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:49:18,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:18,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333266563] [2021-12-15 22:49:18,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333266563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:18,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:18,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:18,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22218997] [2021-12-15 22:49:18,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:18,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:18,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:49:18,749 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:19,638 INFO L93 Difference]: Finished difference Result 1074 states and 1446 transitions. [2021-12-15 22:49:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:19,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-15 22:49:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:19,643 INFO L225 Difference]: With dead ends: 1074 [2021-12-15 22:49:19,644 INFO L226 Difference]: Without dead ends: 716 [2021-12-15 22:49:19,645 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 [2021-12-15 22:49:19,646 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 432 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:19,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 122 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:49:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-12-15 22:49:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-12-15 22:49:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.26993006993007) internal successors, (908), 715 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 908 transitions. [2021-12-15 22:49:19,698 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 908 transitions. Word has length 105 [2021-12-15 22:49:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:19,700 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 908 transitions. [2021-12-15 22:49:19,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 908 transitions. [2021-12-15 22:49:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-15 22:49:19,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:19,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-15 22:49:19,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:49:19,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash -889463106, now seen corresponding path program 1 times [2021-12-15 22:49:19,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:19,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493935183] [2021-12-15 22:49:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:19,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 22:49:19,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:19,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493935183] [2021-12-15 22:49:19,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493935183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:19,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:19,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:49:19,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222343288] [2021-12-15 22:49:19,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:19,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:19,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:19,811 INFO L87 Difference]: Start difference. First operand 716 states and 908 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:20,404 INFO L93 Difference]: Finished difference Result 1430 states and 1917 transitions. [2021-12-15 22:49:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 171 [2021-12-15 22:49:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:20,409 INFO L225 Difference]: With dead ends: 1430 [2021-12-15 22:49:20,409 INFO L226 Difference]: Without dead ends: 894 [2021-12-15 22:49:20,411 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 [2021-12-15 22:49:20,412 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 125 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:20,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 57 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:49:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-12-15 22:49:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 894. [2021-12-15 22:49:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.257558790593505) internal successors, (1123), 893 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1123 transitions. [2021-12-15 22:49:20,436 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1123 transitions. Word has length 171 [2021-12-15 22:49:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:20,437 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1123 transitions. [2021-12-15 22:49:20,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1123 transitions. [2021-12-15 22:49:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-15 22:49:20,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:20,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:20,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:49:20,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash 592580129, now seen corresponding path program 1 times [2021-12-15 22:49:20,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:20,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744006939] [2021-12-15 22:49:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:20,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:49:20,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:20,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744006939] [2021-12-15 22:49:20,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744006939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:20,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:20,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:20,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848496340] [2021-12-15 22:49:20,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:20,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:20,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:49:20,577 INFO L87 Difference]: Start difference. First operand 894 states and 1123 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:21,226 INFO L93 Difference]: Finished difference Result 1815 states and 2291 transitions. [2021-12-15 22:49:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:21,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-12-15 22:49:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:21,231 INFO L225 Difference]: With dead ends: 1815 [2021-12-15 22:49:21,231 INFO L226 Difference]: Without dead ends: 1072 [2021-12-15 22:49:21,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:49:21,233 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:21,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 114 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:49:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-15 22:49:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 894. [2021-12-15 22:49:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.1590145576707727) internal successors, (1035), 893 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1035 transitions. [2021-12-15 22:49:21,255 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1035 transitions. Word has length 185 [2021-12-15 22:49:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:21,256 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1035 transitions. [2021-12-15 22:49:21,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1035 transitions. [2021-12-15 22:49:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 22:49:21,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:21,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:21,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:49:21,260 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 421195105, now seen corresponding path program 1 times [2021-12-15 22:49:21,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482858039] [2021-12-15 22:49:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:21,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 22:49:21,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482858039] [2021-12-15 22:49:21,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482858039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:21,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:21,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:21,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854562685] [2021-12-15 22:49:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:21,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:21,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:21,419 INFO L87 Difference]: Start difference. First operand 894 states and 1035 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:21,880 INFO L93 Difference]: Finished difference Result 1608 states and 1889 transitions. [2021-12-15 22:49:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 237 [2021-12-15 22:49:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:21,887 INFO L225 Difference]: With dead ends: 1608 [2021-12-15 22:49:21,888 INFO L226 Difference]: Without dead ends: 1606 [2021-12-15 22:49:21,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:21,889 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 159 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:21,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 11 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:49:21,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-12-15 22:49:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1250. [2021-12-15 22:49:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.2033626901521217) internal successors, (1503), 1249 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1503 transitions. [2021-12-15 22:49:21,921 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1503 transitions. Word has length 237 [2021-12-15 22:49:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:21,922 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1503 transitions. [2021-12-15 22:49:21,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1503 transitions. [2021-12-15 22:49:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 22:49:21,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:21,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:49:21,931 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:21,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1648638209, now seen corresponding path program 1 times [2021-12-15 22:49:21,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:21,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103808064] [2021-12-15 22:49:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:21,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 22:49:22,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103808064] [2021-12-15 22:49:22,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103808064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:22,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:22,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:22,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445915423] [2021-12-15 22:49:22,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:22,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:22,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:22,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:22,092 INFO L87 Difference]: Start difference. First operand 1250 states and 1503 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:22,574 INFO L93 Difference]: Finished difference Result 2676 states and 3293 transitions. [2021-12-15 22:49:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 306 [2021-12-15 22:49:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:22,580 INFO L225 Difference]: With dead ends: 2676 [2021-12-15 22:49:22,581 INFO L226 Difference]: Without dead ends: 1606 [2021-12-15 22:49:22,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:22,583 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:22,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 77 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:49:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-12-15 22:49:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2021-12-15 22:49:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1825545171339564) internal successors, (1898), 1605 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1898 transitions. [2021-12-15 22:49:22,611 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1898 transitions. Word has length 306 [2021-12-15 22:49:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:22,612 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1898 transitions. [2021-12-15 22:49:22,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1898 transitions. [2021-12-15 22:49:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-15 22:49:22,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:22,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:49:22,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:49:22,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1986254963, now seen corresponding path program 1 times [2021-12-15 22:49:22,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334230761] [2021-12-15 22:49:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:22,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-12-15 22:49:22,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334230761] [2021-12-15 22:49:22,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334230761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:22,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:22,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:22,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246110461] [2021-12-15 22:49:22,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:22,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:22,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:22,718 INFO L87 Difference]: Start difference. First operand 1606 states and 1898 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:23,208 INFO L93 Difference]: Finished difference Result 3566 states and 4299 transitions. [2021-12-15 22:49:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 317 [2021-12-15 22:49:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:23,215 INFO L225 Difference]: With dead ends: 3566 [2021-12-15 22:49:23,215 INFO L226 Difference]: Without dead ends: 2140 [2021-12-15 22:49:23,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:23,218 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:23,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 83 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:49:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-12-15 22:49:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1784. [2021-12-15 22:49:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.1817162086371285) internal successors, (2107), 1783 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2107 transitions. [2021-12-15 22:49:23,249 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2107 transitions. Word has length 317 [2021-12-15 22:49:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:23,250 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2107 transitions. [2021-12-15 22:49:23,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2107 transitions. [2021-12-15 22:49:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-15 22:49:23,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:23,255 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-15 22:49:23,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:49:23,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash -296155205, now seen corresponding path program 1 times [2021-12-15 22:49:23,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:23,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754003692] [2021-12-15 22:49:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:23,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 266 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 22:49:23,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:23,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754003692] [2021-12-15 22:49:23,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754003692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911464525] [2021-12-15 22:49:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:23,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:23,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:23,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:23,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:49:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:23,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:49:23,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 22:49:24,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:49:24,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911464525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:24,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:49:24,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:49:24,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568064790] [2021-12-15 22:49:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:24,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:24,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:49:24,520 INFO L87 Difference]: Start difference. First operand 1784 states and 2107 transitions. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:25,290 INFO L93 Difference]: Finished difference Result 3566 states and 4235 transitions. [2021-12-15 22:49:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:25,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 330 [2021-12-15 22:49:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:25,301 INFO L225 Difference]: With dead ends: 3566 [2021-12-15 22:49:25,301 INFO L226 Difference]: Without dead ends: 1962 [2021-12-15 22:49:25,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:49:25,304 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:25,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 51 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:49:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-12-15 22:49:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2021-12-15 22:49:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.1738908720040795) internal successors, (2302), 1961 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2302 transitions. [2021-12-15 22:49:25,342 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2302 transitions. Word has length 330 [2021-12-15 22:49:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:25,342 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2302 transitions. [2021-12-15 22:49:25,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2302 transitions. [2021-12-15 22:49:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-15 22:49:25,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:25,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:25,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:25,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:25,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash -572919035, now seen corresponding path program 1 times [2021-12-15 22:49:25,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:25,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475054187] [2021-12-15 22:49:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:25,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-12-15 22:49:25,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475054187] [2021-12-15 22:49:25,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475054187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307856987] [2021-12-15 22:49:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:25,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:25,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:25,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:49:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:25,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:49:25,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-15 22:49:26,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:49:26,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307856987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:26,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:49:26,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:49:26,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925889929] [2021-12-15 22:49:26,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:26,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:26,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:49:26,661 INFO L87 Difference]: Start difference. First operand 1962 states and 2302 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:27,074 INFO L93 Difference]: Finished difference Result 2854 states and 3298 transitions. [2021-12-15 22:49:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 406 [2021-12-15 22:49:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:27,084 INFO L225 Difference]: With dead ends: 2854 [2021-12-15 22:49:27,084 INFO L226 Difference]: Without dead ends: 2852 [2021-12-15 22:49:27,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:49:27,086 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:27,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 22 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:49:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-12-15 22:49:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1784. [2021-12-15 22:49:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.1486259113853057) internal successors, (2048), 1783 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2048 transitions. [2021-12-15 22:49:27,120 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2048 transitions. Word has length 406 [2021-12-15 22:49:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:27,121 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2048 transitions. [2021-12-15 22:49:27,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2048 transitions. [2021-12-15 22:49:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-12-15 22:49:27,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:27,127 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:27,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:27,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 22:49:27,343 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash 809452188, now seen corresponding path program 1 times [2021-12-15 22:49:27,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:27,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132098280] [2021-12-15 22:49:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:27,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-12-15 22:49:27,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:27,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132098280] [2021-12-15 22:49:27,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132098280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:27,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:27,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:27,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639109277] [2021-12-15 22:49:27,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:27,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:27,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:49:27,477 INFO L87 Difference]: Start difference. First operand 1784 states and 2048 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:28,006 INFO L93 Difference]: Finished difference Result 3595 states and 4140 transitions. [2021-12-15 22:49:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 408 [2021-12-15 22:49:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:28,013 INFO L225 Difference]: With dead ends: 3595 [2021-12-15 22:49:28,013 INFO L226 Difference]: Without dead ends: 1962 [2021-12-15 22:49:28,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:49:28,016 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 142 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:28,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 17 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:49:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-12-15 22:49:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784. [2021-12-15 22:49:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.092540661805945) internal successors, (1948), 1783 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1948 transitions. [2021-12-15 22:49:28,051 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1948 transitions. Word has length 408 [2021-12-15 22:49:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:28,051 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 1948 transitions. [2021-12-15 22:49:28,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1948 transitions. [2021-12-15 22:49:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-12-15 22:49:28,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:28,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:28,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:49:28,055 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:28,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1999262927, now seen corresponding path program 1 times [2021-12-15 22:49:28,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:28,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042843487] [2021-12-15 22:49:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:28,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 22:49:28,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:28,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042843487] [2021-12-15 22:49:28,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042843487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:28,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:28,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:28,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689314029] [2021-12-15 22:49:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:28,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:28,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:28,178 INFO L87 Difference]: Start difference. First operand 1784 states and 1948 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:28,589 INFO L93 Difference]: Finished difference Result 4100 states and 4537 transitions. [2021-12-15 22:49:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 419 [2021-12-15 22:49:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:28,596 INFO L225 Difference]: With dead ends: 4100 [2021-12-15 22:49:28,596 INFO L226 Difference]: Without dead ends: 2496 [2021-12-15 22:49:28,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:28,599 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 111 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:28,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 243 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:49:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-12-15 22:49:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2318. [2021-12-15 22:49:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 1.0785498489425982) internal successors, (2499), 2317 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2499 transitions. [2021-12-15 22:49:28,632 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2499 transitions. Word has length 419 [2021-12-15 22:49:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:28,633 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2499 transitions. [2021-12-15 22:49:28,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2499 transitions. [2021-12-15 22:49:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2021-12-15 22:49:28,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:28,638 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-15 22:49:28,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:49:28,638 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2077075784, now seen corresponding path program 1 times [2021-12-15 22:49:28,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:28,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557199851] [2021-12-15 22:49:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:28,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2021-12-15 22:49:28,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:28,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557199851] [2021-12-15 22:49:28,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557199851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:28,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:28,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:28,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655805338] [2021-12-15 22:49:28,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:28,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:28,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:28,808 INFO L87 Difference]: Start difference. First operand 2318 states and 2499 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:29,254 INFO L93 Difference]: Finished difference Result 4990 states and 5444 transitions. [2021-12-15 22:49:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 574 [2021-12-15 22:49:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:29,264 INFO L225 Difference]: With dead ends: 4990 [2021-12-15 22:49:29,264 INFO L226 Difference]: Without dead ends: 2852 [2021-12-15 22:49:29,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:29,267 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 110 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:29,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 241 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:49:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-12-15 22:49:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2852. [2021-12-15 22:49:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 1.0750613819712382) internal successors, (3065), 2851 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3065 transitions. [2021-12-15 22:49:29,316 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3065 transitions. Word has length 574 [2021-12-15 22:49:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:29,317 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 3065 transitions. [2021-12-15 22:49:29,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3065 transitions. [2021-12-15 22:49:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2021-12-15 22:49:29,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:29,322 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-15 22:49:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:49:29,322 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash -792592171, now seen corresponding path program 1 times [2021-12-15 22:49:29,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:29,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153084532] [2021-12-15 22:49:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:29,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 600 proven. 93 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-15 22:49:29,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153084532] [2021-12-15 22:49:29,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153084532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646351949] [2021-12-15 22:49:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:29,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:29,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:29,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:49:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:49:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2021-12-15 22:49:30,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:49:30,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646351949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:30,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:49:30,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:49:30,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370028908] [2021-12-15 22:49:30,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:30,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:30,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:30,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:30,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:49:30,857 INFO L87 Difference]: Start difference. First operand 2852 states and 3065 transitions. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:31,451 INFO L93 Difference]: Finished difference Result 6236 states and 6699 transitions. [2021-12-15 22:49:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 592 [2021-12-15 22:49:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:31,465 INFO L225 Difference]: With dead ends: 6236 [2021-12-15 22:49:31,465 INFO L226 Difference]: Without dead ends: 3564 [2021-12-15 22:49:31,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:49:31,468 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 121 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:31,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 50 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:49:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-12-15 22:49:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2852. [2021-12-15 22:49:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 1.076464398456682) internal successors, (3069), 2851 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3069 transitions. [2021-12-15 22:49:31,509 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3069 transitions. Word has length 592 [2021-12-15 22:49:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:31,510 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 3069 transitions. [2021-12-15 22:49:31,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3069 transitions. [2021-12-15 22:49:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2021-12-15 22:49:31,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:31,514 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2021-12-15 22:49:31,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:31,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:31,727 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:31,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1209889031, now seen corresponding path program 1 times [2021-12-15 22:49:31,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929656988] [2021-12-15 22:49:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:31,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 22:49:31,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929656988] [2021-12-15 22:49:31,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929656988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619321342] [2021-12-15 22:49:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:31,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:31,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:31,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 22:49:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:32,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:49:32,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 22:49:32,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:49:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 22:49:33,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619321342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:49:33,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:49:33,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-15 22:49:33,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478133226] [2021-12-15 22:49:33,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:49:33,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 22:49:33,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 22:49:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:49:33,768 INFO L87 Difference]: Start difference. First operand 2852 states and 3069 transitions. Second operand has 6 states, 6 states have (on average 112.16666666666667) internal successors, (673), 6 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:34,596 INFO L93 Difference]: Finished difference Result 7304 states and 7909 transitions. [2021-12-15 22:49:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:49:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 112.16666666666667) internal successors, (673), 6 states have internal predecessors, (673), 0 states have call successors, (0), 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 615 [2021-12-15 22:49:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:34,610 INFO L225 Difference]: With dead ends: 7304 [2021-12-15 22:49:34,610 INFO L226 Difference]: Without dead ends: 4632 [2021-12-15 22:49:34,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1228 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:49:34,614 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 332 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:34,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 64 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:49:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-12-15 22:49:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3742. [2021-12-15 22:49:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.074311681368618) internal successors, (4019), 3741 states have internal predecessors, (4019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4019 transitions. [2021-12-15 22:49:34,668 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4019 transitions. Word has length 615 [2021-12-15 22:49:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:34,669 INFO L470 AbstractCegarLoop]: Abstraction has 3742 states and 4019 transitions. [2021-12-15 22:49:34,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.16666666666667) internal successors, (673), 6 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4019 transitions. [2021-12-15 22:49:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-12-15 22:49:34,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:34,676 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:34,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:34,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:34,891 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1097622511, now seen corresponding path program 1 times [2021-12-15 22:49:34,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:34,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369845461] [2021-12-15 22:49:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:34,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 1026 proven. 93 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-12-15 22:49:35,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369845461] [2021-12-15 22:49:35,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369845461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454218379] [2021-12-15 22:49:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:35,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:35,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:35,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:35,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 22:49:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 22:49:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 1104 proven. 108 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-15 22:49:39,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:49:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 571 proven. 323 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-12-15 22:49:46,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454218379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:49:46,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:49:46,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2021-12-15 22:49:46,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031049899] [2021-12-15 22:49:46,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:49:46,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 22:49:46,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 22:49:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-15 22:49:46,884 INFO L87 Difference]: Start difference. First operand 3742 states and 4019 transitions. Second operand has 12 states, 12 states have (on average 90.83333333333333) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:49,219 INFO L93 Difference]: Finished difference Result 10783 states and 11535 transitions. [2021-12-15 22:49:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 22:49:49,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 90.83333333333333) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 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 700 [2021-12-15 22:49:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:49,233 INFO L225 Difference]: With dead ends: 10783 [2021-12-15 22:49:49,233 INFO L226 Difference]: Without dead ends: 7221 [2021-12-15 22:49:49,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1392 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2021-12-15 22:49:49,245 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1405 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:49,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1405 Valid, 70 Invalid, 3263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:49:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-12-15 22:49:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4098. [2021-12-15 22:49:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.0585794483768611) internal successors, (4337), 4097 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 4337 transitions. [2021-12-15 22:49:49,322 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 4337 transitions. Word has length 700 [2021-12-15 22:49:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:49,323 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 4337 transitions. [2021-12-15 22:49:49,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.83333333333333) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 4337 transitions. [2021-12-15 22:49:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-12-15 22:49:49,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:49,331 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2021-12-15 22:49:49,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:49,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 22:49:49,556 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1108711326, now seen corresponding path program 1 times [2021-12-15 22:49:49,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435989056] [2021-12-15 22:49:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:49,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 1033 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 22:49:49,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:49,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435989056] [2021-12-15 22:49:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435989056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:49,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307551091] [2021-12-15 22:49:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:49,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:49,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:49,929 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:49,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 22:49:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 22:49:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 746 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-12-15 22:49:51,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:49:51,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307551091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:51,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:49:51,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-15 22:49:51,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791846464] [2021-12-15 22:49:51,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:51,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:51,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:49:51,189 INFO L87 Difference]: Start difference. First operand 4098 states and 4337 transitions. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:51,890 INFO L93 Difference]: Finished difference Result 9620 states and 10208 transitions. [2021-12-15 22:49:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:51,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 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 782 [2021-12-15 22:49:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:51,900 INFO L225 Difference]: With dead ends: 9620 [2021-12-15 22:49:51,900 INFO L226 Difference]: Without dead ends: 5702 [2021-12-15 22:49:51,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:49:51,905 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 234 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:51,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 56 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:49:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5702 states. [2021-12-15 22:49:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5702 to 4988. [2021-12-15 22:49:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.059554842590736) internal successors, (5284), 4987 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5284 transitions. [2021-12-15 22:49:51,969 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5284 transitions. Word has length 782 [2021-12-15 22:49:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:51,970 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5284 transitions. [2021-12-15 22:49:51,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5284 transitions. [2021-12-15 22:49:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2021-12-15 22:49:51,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:51,978 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 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, 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] [2021-12-15 22:49:52,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:52,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 22:49:52,192 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:52,192 INFO L85 PathProgramCache]: Analyzing trace with hash -813786161, now seen corresponding path program 1 times [2021-12-15 22:49:52,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:52,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767420704] [2021-12-15 22:49:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:52,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1798 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-12-15 22:49:52,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767420704] [2021-12-15 22:49:52,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767420704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:52,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:52,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:52,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611135637] [2021-12-15 22:49:52,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:52,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:52,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:52,435 INFO L87 Difference]: Start difference. First operand 4988 states and 5284 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:52,902 INFO L93 Difference]: Finished difference Result 10686 states and 11350 transitions. [2021-12-15 22:49:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:52,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 784 [2021-12-15 22:49:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:52,911 INFO L225 Difference]: With dead ends: 10686 [2021-12-15 22:49:52,912 INFO L226 Difference]: Without dead ends: 5700 [2021-12-15 22:49:52,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:52,919 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:52,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 245 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:49:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2021-12-15 22:49:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 4988. [2021-12-15 22:49:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.0531381592139564) internal successors, (5252), 4987 states have internal predecessors, (5252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5252 transitions. [2021-12-15 22:49:52,996 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5252 transitions. Word has length 784 [2021-12-15 22:49:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:52,996 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5252 transitions. [2021-12-15 22:49:52,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5252 transitions. [2021-12-15 22:49:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2021-12-15 22:49:53,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:53,006 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-15 22:49:53,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:49:53,006 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash -697382010, now seen corresponding path program 1 times [2021-12-15 22:49:53,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402019515] [2021-12-15 22:49:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:53,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 1069 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 22:49:53,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402019515] [2021-12-15 22:49:53,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402019515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:53,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444897952] [2021-12-15 22:49:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:53,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:53,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:53,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:53,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 22:49:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 22:49:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 782 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-12-15 22:49:54,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:49:54,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444897952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:54,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:49:54,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-15 22:49:54,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892814521] [2021-12-15 22:49:54,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:54,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:54,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:49:54,501 INFO L87 Difference]: Start difference. First operand 4988 states and 5252 transitions. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:55,092 INFO L93 Difference]: Finished difference Result 10866 states and 11420 transitions. [2021-12-15 22:49:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 815 [2021-12-15 22:49:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:55,104 INFO L225 Difference]: With dead ends: 10866 [2021-12-15 22:49:55,104 INFO L226 Difference]: Without dead ends: 5880 [2021-12-15 22:49:55,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 814 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:49:55,110 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 201 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:55,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 48 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:49:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2021-12-15 22:49:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4988. [2021-12-15 22:49:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.0527371165029076) internal successors, (5250), 4987 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5250 transitions. [2021-12-15 22:49:55,169 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5250 transitions. Word has length 815 [2021-12-15 22:49:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:55,170 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5250 transitions. [2021-12-15 22:49:55,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5250 transitions. [2021-12-15 22:49:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2021-12-15 22:49:55,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:55,178 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-15 22:49:55,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:55,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:55,403 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1022736429, now seen corresponding path program 1 times [2021-12-15 22:49:55,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:55,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705570011] [2021-12-15 22:49:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:55,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2086 backedges. 1070 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 22:49:55,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:55,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705570011] [2021-12-15 22:49:55,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705570011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:55,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213082136] [2021-12-15 22:49:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:55,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:55,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:55,694 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:49:55,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 22:49:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 22:49:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2086 backedges. 1210 proven. 485 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-15 22:49:58,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:50:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2086 backedges. 1142 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 22:50:02,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213082136] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 22:50:02,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 22:50:02,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 10 [2021-12-15 22:50:02,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300453779] [2021-12-15 22:50:02,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:50:02,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:50:02,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:50:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:50:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=51, Unknown=1, NotChecked=0, Total=90 [2021-12-15 22:50:02,585 INFO L87 Difference]: Start difference. First operand 4988 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:50:03,194 INFO L93 Difference]: Finished difference Result 10508 states and 11060 transitions. [2021-12-15 22:50:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:50:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 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 816 [2021-12-15 22:50:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:50:03,203 INFO L225 Difference]: With dead ends: 10508 [2021-12-15 22:50:03,204 INFO L226 Difference]: Without dead ends: 5700 [2021-12-15 22:50:03,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1626 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=38, Invalid=51, Unknown=1, NotChecked=0, Total=90 [2021-12-15 22:50:03,209 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 325 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:50:03,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 10 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 447 Invalid, 0 Unknown, 1 Unchecked, 0.6s Time] [2021-12-15 22:50:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2021-12-15 22:50:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5166. [2021-12-15 22:50:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 5165 states have (on average 1.053436592449177) internal successors, (5441), 5165 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 5441 transitions. [2021-12-15 22:50:03,304 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 5441 transitions. Word has length 816 [2021-12-15 22:50:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:50:03,305 INFO L470 AbstractCegarLoop]: Abstraction has 5166 states and 5441 transitions. [2021-12-15 22:50:03,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 5441 transitions. [2021-12-15 22:50:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2021-12-15 22:50:03,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:50:03,313 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 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, 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] [2021-12-15 22:50:03,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 22:50:03,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:50:03,538 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:50:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:50:03,539 INFO L85 PathProgramCache]: Analyzing trace with hash -507883733, now seen corresponding path program 1 times [2021-12-15 22:50:03,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:50:03,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114963379] [2021-12-15 22:50:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:50:03,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:50:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:50:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2286 backedges. 1318 proven. 0 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 22:50:03,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:50:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114963379] [2021-12-15 22:50:03,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114963379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:50:03,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:50:03,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:50:03,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90315261] [2021-12-15 22:50:03,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:50:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:50:03,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:50:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:50:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:50:03,782 INFO L87 Difference]: Start difference. First operand 5166 states and 5441 transitions. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:50:04,246 INFO L93 Difference]: Finished difference Result 10686 states and 11285 transitions. [2021-12-15 22:50:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:50:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 868 [2021-12-15 22:50:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:50:04,258 INFO L225 Difference]: With dead ends: 10686 [2021-12-15 22:50:04,258 INFO L226 Difference]: Without dead ends: 5700 [2021-12-15 22:50:04,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:50:04,264 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:50:04,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 231 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:50:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2021-12-15 22:50:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5522. [2021-12-15 22:50:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5522 states, 5521 states have (on average 1.0523455895671074) internal successors, (5810), 5521 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 5810 transitions. [2021-12-15 22:50:04,332 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 5810 transitions. Word has length 868 [2021-12-15 22:50:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:50:04,333 INFO L470 AbstractCegarLoop]: Abstraction has 5522 states and 5810 transitions. [2021-12-15 22:50:04,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 5810 transitions. [2021-12-15 22:50:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2021-12-15 22:50:04,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:50:04,342 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:50:04,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:50:04,342 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:50:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:50:04,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2009997208, now seen corresponding path program 1 times [2021-12-15 22:50:04,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:50:04,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761488707] [2021-12-15 22:50:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:50:04,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:50:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:50:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 817 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-12-15 22:50:04,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:50:04,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761488707] [2021-12-15 22:50:04,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761488707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:50:04,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:50:04,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:50:04,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422233568] [2021-12-15 22:50:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:50:04,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:50:04,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:50:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:50:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:50:04,627 INFO L87 Difference]: Start difference. First operand 5522 states and 5810 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:50:05,067 INFO L93 Difference]: Finished difference Result 10864 states and 11439 transitions. [2021-12-15 22:50:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:50:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 942 [2021-12-15 22:50:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:50:05,077 INFO L225 Difference]: With dead ends: 10864 [2021-12-15 22:50:05,077 INFO L226 Difference]: Without dead ends: 5522 [2021-12-15 22:50:05,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:50:05,083 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 69 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:50:05,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 226 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:50:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2021-12-15 22:50:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 4988. [2021-12-15 22:50:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.041908963304592) internal successors, (5196), 4987 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5196 transitions. [2021-12-15 22:50:05,151 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5196 transitions. Word has length 942 [2021-12-15 22:50:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:50:05,151 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5196 transitions. [2021-12-15 22:50:05,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5196 transitions. [2021-12-15 22:50:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2021-12-15 22:50:05,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:50:05,164 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 4, 4, 4, 3, 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, 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, 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] [2021-12-15 22:50:05,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:50:05,164 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:50:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:50:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash 299663828, now seen corresponding path program 1 times [2021-12-15 22:50:05,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:50:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99756050] [2021-12-15 22:50:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:50:05,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:50:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:50:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4585 backedges. 1913 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-12-15 22:50:05,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:50:05,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99756050] [2021-12-15 22:50:05,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99756050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:50:05,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:50:05,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:50:05,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79835423] [2021-12-15 22:50:05,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:50:05,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:50:05,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:50:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:50:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:50:05,543 INFO L87 Difference]: Start difference. First operand 4988 states and 5196 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:50:06,027 INFO L93 Difference]: Finished difference Result 9974 states and 10390 transitions. [2021-12-15 22:50:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:50:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 1179 [2021-12-15 22:50:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:50:06,034 INFO L225 Difference]: With dead ends: 9974 [2021-12-15 22:50:06,034 INFO L226 Difference]: Without dead ends: 5166 [2021-12-15 22:50:06,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:50:06,039 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 71 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:50:06,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 243 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:50:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-12-15 22:50:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4988. [2021-12-15 22:50:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.0405053138159215) internal successors, (5189), 4987 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5189 transitions. [2021-12-15 22:50:06,100 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5189 transitions. Word has length 1179 [2021-12-15 22:50:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:50:06,101 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5189 transitions. [2021-12-15 22:50:06,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:50:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5189 transitions. [2021-12-15 22:50:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1375 [2021-12-15 22:50:06,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:50:06,116 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:50:06,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 22:50:06,116 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:50:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:50:06,117 INFO L85 PathProgramCache]: Analyzing trace with hash -209496239, now seen corresponding path program 1 times [2021-12-15 22:50:06,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:50:06,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040028846] [2021-12-15 22:50:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:50:06,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:50:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 22:50:06,306 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 22:50:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat