./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.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 b8f220cadba131cee309fef082c623cdd627c534b9e708cc4a4f1dd2aa7336b9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:45:30,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:45:30,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:45:30,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:45:30,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:45:30,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:45:30,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:45:30,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:45:30,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:45:30,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:45:30,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:45:30,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:45:30,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:45:30,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:45:30,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:45:30,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:45:30,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:45:30,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:45:30,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:45:30,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:45:30,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:45:30,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:45:30,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:45:30,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:45:30,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:45:30,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:45:30,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:45:30,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:45:30,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:45:30,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:45:30,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:45:30,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:45:30,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:45:30,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:45:30,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:45:30,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:45:30,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:45:30,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:45:30,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:45:30,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:45:30,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:45:30,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:45:31,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:45:31,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:45:31,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:45:31,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:45:31,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:45:31,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:45:31,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:45:31,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:45:31,005 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:45:31,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:45:31,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:45:31,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:45:31,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:45:31,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:45:31,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:45:31,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:45:31,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:45:31,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:45:31,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:45:31,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:45:31,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:45:31,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:45:31,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:45:31,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:45:31,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:45:31,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:45:31,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:45:31,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:45:31,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:45:31,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:45:31,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:45:31,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:45:31,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:45:31,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:45:31,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8f220cadba131cee309fef082c623cdd627c534b9e708cc4a4f1dd2aa7336b9 [2021-12-21 13:45:31,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:45:31,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:45:31,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:45:31,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:45:31,248 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:45:31,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-21 13:45:31,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d55a688e/86e3d5fc787c40a0b779c7311e3df6eb/FLAG4a21d147e [2021-12-21 13:45:31,705 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:45:31,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-21 13:45:31,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d55a688e/86e3d5fc787c40a0b779c7311e3df6eb/FLAG4a21d147e [2021-12-21 13:45:31,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d55a688e/86e3d5fc787c40a0b779c7311e3df6eb [2021-12-21 13:45:31,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:45:31,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:45:31,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:45:31,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:45:31,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:45:31,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:45:31" (1/1) ... [2021-12-21 13:45:31,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e131a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:31, skipping insertion in model container [2021-12-21 13:45:31,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:45:31" (1/1) ... [2021-12-21 13:45:31,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:45:31,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:45:32,017 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2021-12-21 13:45:32,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:45:32,079 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:45:32,116 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2021-12-21 13:45:32,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:45:32,168 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:45:32,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32 WrapperNode [2021-12-21 13:45:32,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:45:32,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:45:32,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:45:32,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:45:32,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,228 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 511 [2021-12-21 13:45:32,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:45:32,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:45:32,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:45:32,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:45:32,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:45:32,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:45:32,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:45:32,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:45:32,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (1/1) ... [2021-12-21 13:45:32,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:45:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:45:32,318 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) [2021-12-21 13:45:32,320 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 [2021-12-21 13:45:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:45:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:45:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:45:32,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:45:32,457 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:45:32,458 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:45:32,860 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:45:32,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:45:32,873 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:45:32,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:45:32 BoogieIcfgContainer [2021-12-21 13:45:32,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:45:32,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:45:32,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:45:32,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:45:32,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:45:31" (1/3) ... [2021-12-21 13:45:32,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fd550d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:45:32, skipping insertion in model container [2021-12-21 13:45:32,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:45:32" (2/3) ... [2021-12-21 13:45:32,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fd550d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:45:32, skipping insertion in model container [2021-12-21 13:45:32,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:45:32" (3/3) ... [2021-12-21 13:45:32,883 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-21 13:45:32,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:45:32,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:45:32,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:45:32,940 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 [2021-12-21 13:45:32,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:45:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 13:45:32,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:32,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:32,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1065941507, now seen corresponding path program 1 times [2021-12-21 13:45:32,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:32,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782587488] [2021-12-21 13:45:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:32,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:33,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:33,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782587488] [2021-12-21 13:45:33,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782587488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:33,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:33,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:45:33,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692898468] [2021-12-21 13:45:33,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:33,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:45:33,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:45:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:45:33,269 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:33,350 INFO L93 Difference]: Finished difference Result 307 states and 498 transitions. [2021-12-21 13:45:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:45:33,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-21 13:45:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:33,361 INFO L225 Difference]: With dead ends: 307 [2021-12-21 13:45:33,361 INFO L226 Difference]: Without dead ends: 205 [2021-12-21 13:45:33,365 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 [2021-12-21 13:45:33,369 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 158 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:33,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 467 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:45:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-21 13:45:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-12-21 13:45:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.5) internal successors, (303), 202 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 303 transitions. [2021-12-21 13:45:33,436 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 303 transitions. Word has length 60 [2021-12-21 13:45:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:33,437 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 303 transitions. [2021-12-21 13:45:33,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 303 transitions. [2021-12-21 13:45:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 13:45:33,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:33,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:33,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:45:33,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1987406881, now seen corresponding path program 1 times [2021-12-21 13:45:33,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:33,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812895358] [2021-12-21 13:45:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:33,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:33,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:33,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812895358] [2021-12-21 13:45:33,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812895358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:33,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:33,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:45:33,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935134785] [2021-12-21 13:45:33,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:33,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:45:33,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:45:33,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:45:33,564 INFO L87 Difference]: Start difference. First operand 203 states and 303 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:33,621 INFO L93 Difference]: Finished difference Result 507 states and 787 transitions. [2021-12-21 13:45:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:45:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-21 13:45:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:33,624 INFO L225 Difference]: With dead ends: 507 [2021-12-21 13:45:33,626 INFO L226 Difference]: Without dead ends: 339 [2021-12-21 13:45:33,627 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 [2021-12-21 13:45:33,629 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 127 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:33,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 402 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:45:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-21 13:45:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2021-12-21 13:45:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.5357142857142858) internal successors, (516), 336 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 516 transitions. [2021-12-21 13:45:33,686 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 516 transitions. Word has length 61 [2021-12-21 13:45:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:33,687 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 516 transitions. [2021-12-21 13:45:33,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 516 transitions. [2021-12-21 13:45:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 13:45:33,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:33,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:33,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:45:33,695 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 175155952, now seen corresponding path program 1 times [2021-12-21 13:45:33,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713663170] [2021-12-21 13:45:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:33,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:33,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713663170] [2021-12-21 13:45:33,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713663170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:33,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:33,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:45:33,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928931714] [2021-12-21 13:45:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:33,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:45:33,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:45:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:45:33,837 INFO L87 Difference]: Start difference. First operand 337 states and 516 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:33,894 INFO L93 Difference]: Finished difference Result 877 states and 1374 transitions. [2021-12-21 13:45:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:45:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-21 13:45:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:33,899 INFO L225 Difference]: With dead ends: 877 [2021-12-21 13:45:33,900 INFO L226 Difference]: Without dead ends: 575 [2021-12-21 13:45:33,905 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 [2021-12-21 13:45:33,911 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 122 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:33,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 387 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:45:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-12-21 13:45:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 573. [2021-12-21 13:45:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.5524475524475525) internal successors, (888), 572 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 888 transitions. [2021-12-21 13:45:33,962 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 888 transitions. Word has length 62 [2021-12-21 13:45:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:33,963 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 888 transitions. [2021-12-21 13:45:33,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 888 transitions. [2021-12-21 13:45:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 13:45:33,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:33,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:33,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:45:33,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:33,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash -546721508, now seen corresponding path program 1 times [2021-12-21 13:45:33,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:33,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275614410] [2021-12-21 13:45:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:33,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:34,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:34,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275614410] [2021-12-21 13:45:34,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275614410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:34,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:34,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:45:34,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851374373] [2021-12-21 13:45:34,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:34,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:45:34,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:45:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:45:34,070 INFO L87 Difference]: Start difference. First operand 573 states and 888 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:34,152 INFO L93 Difference]: Finished difference Result 1521 states and 2386 transitions. [2021-12-21 13:45:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:45:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-21 13:45:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:34,158 INFO L225 Difference]: With dead ends: 1521 [2021-12-21 13:45:34,158 INFO L226 Difference]: Without dead ends: 983 [2021-12-21 13:45:34,160 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 [2021-12-21 13:45:34,168 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 117 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:34,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 372 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:45:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-12-21 13:45:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 981. [2021-12-21 13:45:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.5551020408163265) internal successors, (1524), 980 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1524 transitions. [2021-12-21 13:45:34,231 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1524 transitions. Word has length 63 [2021-12-21 13:45:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:34,233 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1524 transitions. [2021-12-21 13:45:34,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1524 transitions. [2021-12-21 13:45:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 13:45:34,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:34,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:34,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:45:34,235 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash -8861705, now seen corresponding path program 1 times [2021-12-21 13:45:34,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:34,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133478741] [2021-12-21 13:45:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:34,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:34,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:34,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133478741] [2021-12-21 13:45:34,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133478741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:34,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:34,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:45:34,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381676338] [2021-12-21 13:45:34,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:34,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:45:34,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:34,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:45:34,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:45:34,375 INFO L87 Difference]: Start difference. First operand 981 states and 1524 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:34,876 INFO L93 Difference]: Finished difference Result 6657 states and 10458 transitions. [2021-12-21 13:45:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:45:34,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 13:45:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:34,902 INFO L225 Difference]: With dead ends: 6657 [2021-12-21 13:45:34,902 INFO L226 Difference]: Without dead ends: 5711 [2021-12-21 13:45:34,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:45:34,906 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 1940 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:34,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1940 Valid, 1661 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:45:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-21 13:45:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 1925. [2021-12-21 13:45:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 1.5488565488565489) internal successors, (2980), 1924 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2980 transitions. [2021-12-21 13:45:35,143 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2980 transitions. Word has length 64 [2021-12-21 13:45:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:35,145 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 2980 transitions. [2021-12-21 13:45:35,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2980 transitions. [2021-12-21 13:45:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:45:35,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:35,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:35,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:45:35,151 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:35,153 INFO L85 PathProgramCache]: Analyzing trace with hash -294169095, now seen corresponding path program 1 times [2021-12-21 13:45:35,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:35,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010583914] [2021-12-21 13:45:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:35,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:35,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010583914] [2021-12-21 13:45:35,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010583914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:35,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:35,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:45:35,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343265285] [2021-12-21 13:45:35,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:35,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:45:35,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:35,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:45:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:45:35,295 INFO L87 Difference]: Start difference. First operand 1925 states and 2980 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:36,376 INFO L93 Difference]: Finished difference Result 10095 states and 15593 transitions. [2021-12-21 13:45:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:45:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-21 13:45:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:36,407 INFO L225 Difference]: With dead ends: 10095 [2021-12-21 13:45:36,407 INFO L226 Difference]: Without dead ends: 8205 [2021-12-21 13:45:36,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:45:36,414 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 627 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:36,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 1215 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:45:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8205 states. [2021-12-21 13:45:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8205 to 8197. [2021-12-21 13:45:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8196 states have (on average 1.5387994143484627) internal successors, (12612), 8196 states have internal predecessors, (12612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 12612 transitions. [2021-12-21 13:45:37,430 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 12612 transitions. Word has length 65 [2021-12-21 13:45:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:37,431 INFO L470 AbstractCegarLoop]: Abstraction has 8197 states and 12612 transitions. [2021-12-21 13:45:37,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 12612 transitions. [2021-12-21 13:45:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:45:37,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:37,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:37,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:45:37,433 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1075132642, now seen corresponding path program 1 times [2021-12-21 13:45:37,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411777299] [2021-12-21 13:45:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:37,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:37,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411777299] [2021-12-21 13:45:37,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411777299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:37,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:37,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:45:37,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132116943] [2021-12-21 13:45:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:37,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:45:37,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:45:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:45:37,471 INFO L87 Difference]: Start difference. First operand 8197 states and 12612 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:38,892 INFO L93 Difference]: Finished difference Result 22761 states and 34886 transitions. [2021-12-21 13:45:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:45:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-21 13:45:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:38,947 INFO L225 Difference]: With dead ends: 22761 [2021-12-21 13:45:38,948 INFO L226 Difference]: Without dead ends: 14599 [2021-12-21 13:45:39,033 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 [2021-12-21 13:45:39,035 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 136 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:39,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 450 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:45:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14599 states. [2021-12-21 13:45:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14599 to 14597. [2021-12-21 13:45:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14597 states, 14596 states have (on average 1.5174020279528637) internal successors, (22148), 14596 states have internal predecessors, (22148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14597 states to 14597 states and 22148 transitions. [2021-12-21 13:45:40,291 INFO L78 Accepts]: Start accepts. Automaton has 14597 states and 22148 transitions. Word has length 65 [2021-12-21 13:45:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:40,291 INFO L470 AbstractCegarLoop]: Abstraction has 14597 states and 22148 transitions. [2021-12-21 13:45:40,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 14597 states and 22148 transitions. [2021-12-21 13:45:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 13:45:40,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:40,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:40,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:45:40,292 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:40,293 INFO L85 PathProgramCache]: Analyzing trace with hash -938816400, now seen corresponding path program 1 times [2021-12-21 13:45:40,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361934484] [2021-12-21 13:45:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:40,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:40,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:40,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361934484] [2021-12-21 13:45:40,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361934484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:40,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:40,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:45:40,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525157812] [2021-12-21 13:45:40,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:40,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:45:40,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:40,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:45:40,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:45:40,345 INFO L87 Difference]: Start difference. First operand 14597 states and 22148 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:43,158 INFO L93 Difference]: Finished difference Result 43721 states and 66374 transitions. [2021-12-21 13:45:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:45:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-21 13:45:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:43,238 INFO L225 Difference]: With dead ends: 43721 [2021-12-21 13:45:43,238 INFO L226 Difference]: Without dead ends: 29159 [2021-12-21 13:45:43,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:45:43,274 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 775 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:43,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 212 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:45:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29159 states. [2021-12-21 13:45:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29159 to 29157. [2021-12-21 13:45:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29157 states, 29156 states have (on average 1.509260529565098) internal successors, (44004), 29156 states have internal predecessors, (44004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29157 states to 29157 states and 44004 transitions. [2021-12-21 13:45:46,125 INFO L78 Accepts]: Start accepts. Automaton has 29157 states and 44004 transitions. Word has length 67 [2021-12-21 13:45:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:46,125 INFO L470 AbstractCegarLoop]: Abstraction has 29157 states and 44004 transitions. [2021-12-21 13:45:46,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29157 states and 44004 transitions. [2021-12-21 13:45:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 13:45:46,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:46,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:46,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:45:46,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash 831155307, now seen corresponding path program 1 times [2021-12-21 13:45:46,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:46,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22291457] [2021-12-21 13:45:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:46,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:46,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:46,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22291457] [2021-12-21 13:45:46,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22291457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:46,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:46,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:45:46,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195507981] [2021-12-21 13:45:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:46,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:45:46,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:45:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:45:46,238 INFO L87 Difference]: Start difference. First operand 29157 states and 44004 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:51,610 INFO L93 Difference]: Finished difference Result 59559 states and 89253 transitions. [2021-12-21 13:45:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:45:51,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-21 13:45:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:51,792 INFO L225 Difference]: With dead ends: 59559 [2021-12-21 13:45:51,792 INFO L226 Difference]: Without dead ends: 59557 [2021-12-21 13:45:51,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:45:51,818 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 284 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:51,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 891 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:45:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59557 states. [2021-12-21 13:45:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59557 to 30437. [2021-12-21 13:45:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30437 states, 30436 states have (on average 1.4878433434091207) internal successors, (45284), 30436 states have internal predecessors, (45284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30437 states to 30437 states and 45284 transitions. [2021-12-21 13:45:55,330 INFO L78 Accepts]: Start accepts. Automaton has 30437 states and 45284 transitions. Word has length 67 [2021-12-21 13:45:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:45:55,330 INFO L470 AbstractCegarLoop]: Abstraction has 30437 states and 45284 transitions. [2021-12-21 13:45:55,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 30437 states and 45284 transitions. [2021-12-21 13:45:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 13:45:55,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:45:55,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:45:55,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:45:55,332 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:45:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:45:55,333 INFO L85 PathProgramCache]: Analyzing trace with hash 6583829, now seen corresponding path program 1 times [2021-12-21 13:45:55,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:45:55,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923531955] [2021-12-21 13:45:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:45:55,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:45:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:45:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:45:55,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:45:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923531955] [2021-12-21 13:45:55,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923531955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:45:55,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:45:55,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:45:55,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914327867] [2021-12-21 13:45:55,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:45:55,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:45:55,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:45:55,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:45:55,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:45:55,375 INFO L87 Difference]: Start difference. First operand 30437 states and 45284 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:45:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:45:59,823 INFO L93 Difference]: Finished difference Result 74187 states and 110320 transitions. [2021-12-21 13:45:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:45:59,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-21 13:45:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:45:59,924 INFO L225 Difference]: With dead ends: 74187 [2021-12-21 13:45:59,925 INFO L226 Difference]: Without dead ends: 43785 [2021-12-21 13:45:59,976 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 [2021-12-21 13:45:59,977 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 107 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:45:59,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 328 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43785 states. [2021-12-21 13:46:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43785 to 43783. [2021-12-21 13:46:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43783 states, 43782 states have (on average 1.4796491708921475) internal successors, (64782), 43782 states have internal predecessors, (64782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43783 states to 43783 states and 64782 transitions. [2021-12-21 13:46:04,264 INFO L78 Accepts]: Start accepts. Automaton has 43783 states and 64782 transitions. Word has length 68 [2021-12-21 13:46:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:04,265 INFO L470 AbstractCegarLoop]: Abstraction has 43783 states and 64782 transitions. [2021-12-21 13:46:04,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 43783 states and 64782 transitions. [2021-12-21 13:46:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 13:46:04,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:04,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:04,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:46:04,281 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:04,281 INFO L85 PathProgramCache]: Analyzing trace with hash -83102152, now seen corresponding path program 1 times [2021-12-21 13:46:04,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:04,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422037316] [2021-12-21 13:46:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:04,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:46:04,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422037316] [2021-12-21 13:46:04,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422037316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:46:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95166288] [2021-12-21 13:46:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:04,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:46:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:46:04,367 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) [2021-12-21 13:46:04,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:46:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 13:46:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:46:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:46:04,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:46:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:46:05,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95166288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:46:05,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:46:05,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2021-12-21 13:46:05,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724790384] [2021-12-21 13:46:05,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:46:05,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:46:05,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:05,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:46:05,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:46:05,167 INFO L87 Difference]: Start difference. First operand 43783 states and 64782 transitions. Second operand has 10 states, 10 states have (on average 24.3) internal successors, (243), 10 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)