./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.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 f34e139d311e566fb184ea47633b96986afa15e7a6ae2ebeede6340c715d2189 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:34:45,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:34:45,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:34:45,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:34:45,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:34:45,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:34:45,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:34:45,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:34:45,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:34:45,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:34:45,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:34:45,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:34:45,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:34:45,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:34:45,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:34:45,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:34:45,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:34:45,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:34:45,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:34:45,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:34:45,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:34:45,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:34:46,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:34:46,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:34:46,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:34:46,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:34:46,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:34:46,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:34:46,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:34:46,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:34:46,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:34:46,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:34:46,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:34:46,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:34:46,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:34:46,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:34:46,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:34:46,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:34:46,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:34:46,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:34:46,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:34:46,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:34:46,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:34:46,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:34:46,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:34:46,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:34:46,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:34:46,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:34:46,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:34:46,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:34:46,043 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:34:46,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:34:46,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:34:46,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:34:46,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:34:46,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:34:46,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:34:46,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:34:46,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:34:46,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:34:46,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:34:46,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:34:46,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:34:46,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:34:46,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:34:46,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:34:46,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:34:46,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:34:46,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:34:46,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:34:46,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:34:46,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:34:46,046 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:34:46,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:34:46,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:34:46,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:34:46,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f34e139d311e566fb184ea47633b96986afa15e7a6ae2ebeede6340c715d2189 [2021-12-21 14:34:46,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:34:46,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:34:46,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:34:46,281 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:34:46,281 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:34:46,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2021-12-21 14:34:46,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79abdb81/0173919b7aa94503aa8a1690c30665f2/FLAG50f931501 [2021-12-21 14:34:46,938 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:34:46,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2021-12-21 14:34:46,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79abdb81/0173919b7aa94503aa8a1690c30665f2/FLAG50f931501 [2021-12-21 14:34:47,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79abdb81/0173919b7aa94503aa8a1690c30665f2 [2021-12-21 14:34:47,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:34:47,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:34:47,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:34:47,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:34:47,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:34:47,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:34:47" (1/1) ... [2021-12-21 14:34:47,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66eccef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:47, skipping insertion in model container [2021-12-21 14:34:47,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:34:47" (1/1) ... [2021-12-21 14:34:47,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:34:47,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:34:47,529 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[8653,8666] [2021-12-21 14:34:47,577 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[14208,14221] [2021-12-21 14:34:48,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:34:48,045 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:34:48,076 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[8653,8666] [2021-12-21 14:34:48,083 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[14208,14221] [2021-12-21 14:34:48,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:34:48,466 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:34:48,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48 WrapperNode [2021-12-21 14:34:48,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:34:48,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:34:48,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:34:48,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:34:48,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:48,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:48,733 INFO L137 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5032 [2021-12-21 14:34:48,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:34:48,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:34:48,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:34:48,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:34:48,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:48,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:48,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:48,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:48,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:48,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:49,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:49,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:34:49,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:34:49,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:34:49,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:34:49,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (1/1) ... [2021-12-21 14:34:49,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:34:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:34:49,116 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 14:34:49,147 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 14:34:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:34:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:34:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:34:49,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:34:49,285 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:34:49,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:34:51,885 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:34:51,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:34:51,896 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 14:34:51,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:34:51 BoogieIcfgContainer [2021-12-21 14:34:51,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:34:51,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:34:51,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:34:51,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:34:51,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:34:47" (1/3) ... [2021-12-21 14:34:51,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336cfaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:34:51, skipping insertion in model container [2021-12-21 14:34:51,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:34:48" (2/3) ... [2021-12-21 14:34:51,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336cfaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:34:51, skipping insertion in model container [2021-12-21 14:34:51,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:34:51" (3/3) ... [2021-12-21 14:34:51,904 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2021-12-21 14:34:51,907 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:34:51,908 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:34:51,942 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:34:51,946 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 14:34:51,946 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:34:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states 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 14:34:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 14:34:51,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:51,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:34:51,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:51,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2021-12-21 14:34:51,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29159434] [2021-12-21 14:34:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:51,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:52,092 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 14:34:52,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29159434] [2021-12-21 14:34:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29159434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:52,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:52,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:34:52,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781876966] [2021-12-21 14:34:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:52,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 14:34:52,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:52,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 14:34:52,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 14:34:52,118 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:34:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:52,168 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2021-12-21 14:34:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 14:34:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 14:34:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:52,184 INFO L225 Difference]: With dead ends: 1757 [2021-12-21 14:34:52,184 INFO L226 Difference]: Without dead ends: 827 [2021-12-21 14:34:52,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 14:34:52,193 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:52,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-21 14:34:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-21 14:34:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 14:34:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2021-12-21 14:34:52,258 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2021-12-21 14:34:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:52,259 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2021-12-21 14:34:52,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:34:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2021-12-21 14:34:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 14:34:52,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:52,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:34:52,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:34:52,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:52,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-12-21 14:34:52,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:52,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382224633] [2021-12-21 14:34:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:52,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:52,331 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 14:34:52,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:52,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382224633] [2021-12-21 14:34:52,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382224633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:52,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:52,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:34:52,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122240254] [2021-12-21 14:34:52,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:52,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:34:52,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:34:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:34:52,335 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:34:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:52,425 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2021-12-21 14:34:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:34:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 14:34:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:52,430 INFO L225 Difference]: With dead ends: 919 [2021-12-21 14:34:52,430 INFO L226 Difference]: Without dead ends: 871 [2021-12-21 14:34:52,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:34:52,431 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 71 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:52,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-21 14:34:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2021-12-21 14:34:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 14:34:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2021-12-21 14:34:52,455 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2021-12-21 14:34:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:52,455 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2021-12-21 14:34:52,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:34:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2021-12-21 14:34:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 14:34:52,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:52,457 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] [2021-12-21 14:34:52,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:34:52,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1620709547, now seen corresponding path program 1 times [2021-12-21 14:34:52,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345022496] [2021-12-21 14:34:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:52,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:52,518 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 14:34:52,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:52,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345022496] [2021-12-21 14:34:52,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345022496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:52,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:52,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:34:52,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335128627] [2021-12-21 14:34:52,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:52,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:34:52,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:34:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:52,521 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 14:34:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:54,620 INFO L93 Difference]: Finished difference Result 2331 states and 4410 transitions. [2021-12-21 14:34:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:34:54,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-21 14:34:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:54,627 INFO L225 Difference]: With dead ends: 2331 [2021-12-21 14:34:54,627 INFO L226 Difference]: Without dead ends: 1578 [2021-12-21 14:34:54,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:54,633 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:54,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 526 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 14:34:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-12-21 14:34:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2021-12-21 14:34:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.6269035532994924) internal successors, (2564), 1577 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 14:34:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2564 transitions. [2021-12-21 14:34:54,673 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2564 transitions. Word has length 48 [2021-12-21 14:34:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:54,673 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2564 transitions. [2021-12-21 14:34:54,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 14:34:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2564 transitions. [2021-12-21 14:34:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 14:34:54,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:54,675 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] [2021-12-21 14:34:54,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:34:54,676 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-12-21 14:34:54,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:54,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837769292] [2021-12-21 14:34:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:54,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:54,725 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 14:34:54,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837769292] [2021-12-21 14:34:54,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837769292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:54,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:54,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:34:54,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507591276] [2021-12-21 14:34:54,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:54,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:34:54,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:54,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:34:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:54,727 INFO L87 Difference]: Start difference. First operand 1578 states and 2564 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:54,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:54,748 INFO L93 Difference]: Finished difference Result 1660 states and 2692 transitions. [2021-12-21 14:34:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:34:54,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-21 14:34:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:54,753 INFO L225 Difference]: With dead ends: 1660 [2021-12-21 14:34:54,753 INFO L226 Difference]: Without dead ends: 1616 [2021-12-21 14:34:54,753 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 14:34:54,754 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 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 14:34:54,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-12-21 14:34:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2021-12-21 14:34:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.6259305210918114) internal successors, (2621), 1613 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states 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 14:34:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2621 transitions. [2021-12-21 14:34:54,777 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2621 transitions. Word has length 52 [2021-12-21 14:34:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:54,777 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 2621 transitions. [2021-12-21 14:34:54,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2621 transitions. [2021-12-21 14:34:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 14:34:54,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:54,778 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] [2021-12-21 14:34:54,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:34:54,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:54,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-12-21 14:34:54,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077440585] [2021-12-21 14:34:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:54,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:54,838 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 14:34:54,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:54,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077440585] [2021-12-21 14:34:54,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077440585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:54,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:54,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:34:54,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108273222] [2021-12-21 14:34:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:54,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:34:54,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:34:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:54,841 INFO L87 Difference]: Start difference. First operand 1614 states and 2621 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:54,865 INFO L93 Difference]: Finished difference Result 1762 states and 2853 transitions. [2021-12-21 14:34:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:34:54,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-21 14:34:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:54,870 INFO L225 Difference]: With dead ends: 1762 [2021-12-21 14:34:54,870 INFO L226 Difference]: Without dead ends: 1682 [2021-12-21 14:34:54,870 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 14:34:54,871 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 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 14:34:54,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-12-21 14:34:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2021-12-21 14:34:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1678 states have (on average 1.6233611442193088) internal successors, (2724), 1679 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states 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 14:34:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2724 transitions. [2021-12-21 14:34:54,902 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2724 transitions. Word has length 52 [2021-12-21 14:34:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:54,903 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2724 transitions. [2021-12-21 14:34:54,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2724 transitions. [2021-12-21 14:34:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 14:34:54,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:54,904 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] [2021-12-21 14:34:54,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:34:54,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-12-21 14:34:54,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:54,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316223066] [2021-12-21 14:34:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:54,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:54,951 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 14:34:54,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:54,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316223066] [2021-12-21 14:34:54,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316223066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:54,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:54,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:34:54,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039156014] [2021-12-21 14:34:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:54,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:34:54,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:34:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:54,954 INFO L87 Difference]: Start difference. First operand 1680 states and 2724 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:55,011 INFO L93 Difference]: Finished difference Result 1948 states and 3142 transitions. [2021-12-21 14:34:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:34:55,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-21 14:34:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:55,018 INFO L225 Difference]: With dead ends: 1948 [2021-12-21 14:34:55,018 INFO L226 Difference]: Without dead ends: 1802 [2021-12-21 14:34:55,019 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 14:34:55,022 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 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 14:34:55,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-12-21 14:34:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2021-12-21 14:34:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.617352614015573) internal successors, (2908), 1799 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states 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 14:34:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2908 transitions. [2021-12-21 14:34:55,057 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2908 transitions. Word has length 52 [2021-12-21 14:34:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:55,058 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2908 transitions. [2021-12-21 14:34:55,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2908 transitions. [2021-12-21 14:34:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 14:34:55,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:55,059 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] [2021-12-21 14:34:55,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:34:55,060 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-12-21 14:34:55,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:55,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56471523] [2021-12-21 14:34:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:55,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:55,114 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 14:34:55,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:55,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56471523] [2021-12-21 14:34:55,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56471523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:55,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:55,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:34:55,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280359965] [2021-12-21 14:34:55,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:55,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:34:55,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:55,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:34:55,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:55,117 INFO L87 Difference]: Start difference. First operand 1800 states and 2908 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:55,147 INFO L93 Difference]: Finished difference Result 2284 states and 3654 transitions. [2021-12-21 14:34:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:34:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-21 14:34:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:55,153 INFO L225 Difference]: With dead ends: 2284 [2021-12-21 14:34:55,154 INFO L226 Difference]: Without dead ends: 2018 [2021-12-21 14:34:55,155 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 14:34:55,156 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 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 14:34:55,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-12-21 14:34:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2021-12-21 14:34:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2014 states have (on average 1.6047666335650448) internal successors, (3232), 2015 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states 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 14:34:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3232 transitions. [2021-12-21 14:34:55,191 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3232 transitions. Word has length 52 [2021-12-21 14:34:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:55,192 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3232 transitions. [2021-12-21 14:34:55,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3232 transitions. [2021-12-21 14:34:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 14:34:55,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:55,192 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] [2021-12-21 14:34:55,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:34:55,193 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-12-21 14:34:55,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:55,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818241258] [2021-12-21 14:34:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:55,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:55,258 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 14:34:55,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818241258] [2021-12-21 14:34:55,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818241258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:55,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:55,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:34:55,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721633045] [2021-12-21 14:34:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:55,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:34:55,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:34:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:34:55,261 INFO L87 Difference]: Start difference. First operand 2016 states and 3232 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:55,433 INFO L93 Difference]: Finished difference Result 5872 states and 9128 transitions. [2021-12-21 14:34:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:34:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-21 14:34:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:55,447 INFO L225 Difference]: With dead ends: 5872 [2021-12-21 14:34:55,447 INFO L226 Difference]: Without dead ends: 5390 [2021-12-21 14:34:55,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:34:55,450 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:55,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-12-21 14:34:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2021-12-21 14:34:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2494 states have (on average 1.578187650360866) internal successors, (3936), 2495 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states 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 14:34:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3936 transitions. [2021-12-21 14:34:55,531 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3936 transitions. Word has length 52 [2021-12-21 14:34:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:55,531 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 3936 transitions. [2021-12-21 14:34:55,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 14:34:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3936 transitions. [2021-12-21 14:34:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 14:34:55,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:55,532 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] [2021-12-21 14:34:55,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:34:55,532 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:55,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-12-21 14:34:55,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:55,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588854951] [2021-12-21 14:34:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:55,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:55,555 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 14:34:55,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:55,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588854951] [2021-12-21 14:34:55,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588854951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:55,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:55,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:34:55,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112435526] [2021-12-21 14:34:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:55,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:34:55,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:34:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:55,557 INFO L87 Difference]: Start difference. First operand 2496 states and 3936 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:34:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:55,623 INFO L93 Difference]: Finished difference Result 3902 states and 6036 transitions. [2021-12-21 14:34:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:34:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-21 14:34:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:55,632 INFO L225 Difference]: With dead ends: 3902 [2021-12-21 14:34:55,632 INFO L226 Difference]: Without dead ends: 2940 [2021-12-21 14:34:55,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:34:55,634 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:55,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-12-21 14:34:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-12-21 14:34:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5565395095367847) internal successors, (4570), 2937 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states 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 14:34:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4570 transitions. [2021-12-21 14:34:55,753 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4570 transitions. Word has length 54 [2021-12-21 14:34:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:55,754 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4570 transitions. [2021-12-21 14:34:55,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:34:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4570 transitions. [2021-12-21 14:34:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 14:34:55,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:55,754 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] [2021-12-21 14:34:55,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:34:55,757 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:55,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-12-21 14:34:55,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:55,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76842487] [2021-12-21 14:34:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:55,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:55,878 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 14:34:55,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76842487] [2021-12-21 14:34:55,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76842487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:55,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:55,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:34:55,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133493104] [2021-12-21 14:34:55,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:55,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:34:55,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:55,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:34:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:34:55,880 INFO L87 Difference]: Start difference. First operand 2938 states and 4570 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:34:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:56,017 INFO L93 Difference]: Finished difference Result 4342 states and 6644 transitions. [2021-12-21 14:34:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:34:56,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-21 14:34:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:56,025 INFO L225 Difference]: With dead ends: 4342 [2021-12-21 14:34:56,025 INFO L226 Difference]: Without dead ends: 2940 [2021-12-21 14:34:56,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:34:56,028 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3072 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:56,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 1726 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-12-21 14:34:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-12-21 14:34:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5483651226158037) internal successors, (4546), 2937 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states 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 14:34:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4546 transitions. [2021-12-21 14:34:56,110 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4546 transitions. Word has length 54 [2021-12-21 14:34:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:56,110 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4546 transitions. [2021-12-21 14:34:56,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:34:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4546 transitions. [2021-12-21 14:34:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 14:34:56,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:56,111 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] [2021-12-21 14:34:56,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:34:56,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-12-21 14:34:56,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178498431] [2021-12-21 14:34:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:56,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:56,149 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 14:34:56,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:56,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178498431] [2021-12-21 14:34:56,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178498431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:56,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:56,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:34:56,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728438509] [2021-12-21 14:34:56,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:56,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:34:56,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:56,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:34:56,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:34:56,151 INFO L87 Difference]: Start difference. First operand 2938 states and 4546 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 14:34:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:56,284 INFO L93 Difference]: Finished difference Result 4340 states and 6595 transitions. [2021-12-21 14:34:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:34:56,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-21 14:34:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:56,292 INFO L225 Difference]: With dead ends: 4340 [2021-12-21 14:34:56,292 INFO L226 Difference]: Without dead ends: 2938 [2021-12-21 14:34:56,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:34:56,294 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4543 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:56,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4543 Valid, 2992 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-12-21 14:34:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-12-21 14:34:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5401907356948228) internal successors, (4522), 2937 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states 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 14:34:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4522 transitions. [2021-12-21 14:34:56,437 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4522 transitions. Word has length 55 [2021-12-21 14:34:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:56,437 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4522 transitions. [2021-12-21 14:34:56,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 14:34:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4522 transitions. [2021-12-21 14:34:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 14:34:56,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:56,438 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] [2021-12-21 14:34:56,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:34:56,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-12-21 14:34:56,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:56,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269070191] [2021-12-21 14:34:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:56,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:56,492 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 14:34:56,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269070191] [2021-12-21 14:34:56,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269070191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:56,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:56,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:34:56,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112708408] [2021-12-21 14:34:56,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:34:56,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:34:56,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:34:56,494 INFO L87 Difference]: Start difference. First operand 2938 states and 4522 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 14:34:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:56,666 INFO L93 Difference]: Finished difference Result 4340 states and 6547 transitions. [2021-12-21 14:34:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:34:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-21 14:34:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:56,674 INFO L225 Difference]: With dead ends: 4340 [2021-12-21 14:34:56,674 INFO L226 Difference]: Without dead ends: 2938 [2021-12-21 14:34:56,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:34:56,677 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4576 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4576 SdHoareTripleChecker+Valid, 2993 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:56,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4576 Valid, 2993 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-12-21 14:34:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-12-21 14:34:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5320163487738419) internal successors, (4498), 2937 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states 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 14:34:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4498 transitions. [2021-12-21 14:34:56,794 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4498 transitions. Word has length 55 [2021-12-21 14:34:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:56,794 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4498 transitions. [2021-12-21 14:34:56,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 14:34:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4498 transitions. [2021-12-21 14:34:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 14:34:56,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:56,795 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] [2021-12-21 14:34:56,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:34:56,796 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-12-21 14:34:56,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822466084] [2021-12-21 14:34:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:56,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:56,833 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 14:34:56,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:56,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822466084] [2021-12-21 14:34:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822466084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:56,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:56,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:34:56,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452240065] [2021-12-21 14:34:56,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:56,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:34:56,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:34:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:34:56,835 INFO L87 Difference]: Start difference. First operand 2938 states and 4498 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 14:34:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:57,050 INFO L93 Difference]: Finished difference Result 4169 states and 6196 transitions. [2021-12-21 14:34:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:34:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-21 14:34:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:57,058 INFO L225 Difference]: With dead ends: 4169 [2021-12-21 14:34:57,058 INFO L226 Difference]: Without dead ends: 4167 [2021-12-21 14:34:57,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:34:57,060 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:57,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-12-21 14:34:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2021-12-21 14:34:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.512532981530343) internal successors, (4586), 3033 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states 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 14:34:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4586 transitions. [2021-12-21 14:34:57,203 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4586 transitions. Word has length 55 [2021-12-21 14:34:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:57,204 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4586 transitions. [2021-12-21 14:34:57,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 14:34:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4586 transitions. [2021-12-21 14:34:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:34:57,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:57,206 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:34:57,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:34:57,206 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-12-21 14:34:57,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:57,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660134362] [2021-12-21 14:34:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:57,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 14:34:57,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660134362] [2021-12-21 14:34:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660134362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:57,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:57,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:34:57,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159232563] [2021-12-21 14:34:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:57,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:34:57,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:57,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:34:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:34:57,247 INFO L87 Difference]: Start difference. First operand 3034 states and 4586 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 14:34:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:57,679 INFO L93 Difference]: Finished difference Result 9340 states and 13355 transitions. [2021-12-21 14:34:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:34:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 79 [2021-12-21 14:34:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:57,693 INFO L225 Difference]: With dead ends: 9340 [2021-12-21 14:34:57,693 INFO L226 Difference]: Without dead ends: 7842 [2021-12-21 14:34:57,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:34:57,700 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4751 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:57,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2021-12-21 14:34:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2021-12-21 14:34:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4686395759717314) internal successors, (6650), 4529 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states 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 14:34:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6650 transitions. [2021-12-21 14:34:57,913 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6650 transitions. Word has length 79 [2021-12-21 14:34:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:57,913 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6650 transitions. [2021-12-21 14:34:57,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 14:34:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6650 transitions. [2021-12-21 14:34:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:34:57,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:57,915 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:34:57,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:34:57,915 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-12-21 14:34:57,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428813355] [2021-12-21 14:34:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:57,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 14:34:57,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:57,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428813355] [2021-12-21 14:34:57,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428813355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:57,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:57,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:34:57,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485062363] [2021-12-21 14:34:57,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:57,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:34:57,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:57,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:34:57,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:34:57,956 INFO L87 Difference]: Start difference. First operand 4530 states and 6650 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:34:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:58,436 INFO L93 Difference]: Finished difference Result 10836 states and 15419 transitions. [2021-12-21 14:34:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:34:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-21 14:34:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:58,450 INFO L225 Difference]: With dead ends: 10836 [2021-12-21 14:34:58,451 INFO L226 Difference]: Without dead ends: 9338 [2021-12-21 14:34:58,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:34:58,455 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4708 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4708 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:58,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4708 Valid, 3366 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-12-21 14:34:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2021-12-21 14:34:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.4353600944510034) internal successors, (9726), 6777 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states 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 14:34:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9726 transitions. [2021-12-21 14:34:58,836 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9726 transitions. Word has length 79 [2021-12-21 14:34:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:34:58,836 INFO L470 AbstractCegarLoop]: Abstraction has 6778 states and 9726 transitions. [2021-12-21 14:34:58,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:34:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9726 transitions. [2021-12-21 14:34:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:34:58,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:34:58,838 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:34:58,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:34:58,838 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:34:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:34:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-12-21 14:34:58,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:34:58,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992087436] [2021-12-21 14:34:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:34:58,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:34:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:34:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 14:34:58,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:34:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992087436] [2021-12-21 14:34:58,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992087436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:34:58,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:34:58,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:34:58,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224199437] [2021-12-21 14:34:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:34:58,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:34:58,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:34:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:34:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:34:58,881 INFO L87 Difference]: Start difference. First operand 6778 states and 9726 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 14:34:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:34:59,531 INFO L93 Difference]: Finished difference Result 12332 states and 17483 transitions. [2021-12-21 14:34:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:34:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 79 [2021-12-21 14:34:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:34:59,546 INFO L225 Difference]: With dead ends: 12332 [2021-12-21 14:34:59,547 INFO L226 Difference]: Without dead ends: 10834 [2021-12-21 14:34:59,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:34:59,552 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4740 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4740 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:34:59,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4740 Valid, 3382 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:34:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-12-21 14:35:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2021-12-21 14:35:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4252901353965184) internal successors, (11790), 8273 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states 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 14:35:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11790 transitions. [2021-12-21 14:35:00,060 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11790 transitions. Word has length 79 [2021-12-21 14:35:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:35:00,060 INFO L470 AbstractCegarLoop]: Abstraction has 8274 states and 11790 transitions. [2021-12-21 14:35:00,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 14:35:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11790 transitions. [2021-12-21 14:35:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:35:00,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:35:00,062 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:35:00,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:35:00,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:35:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:35:00,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-12-21 14:35:00,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:35:00,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763225813] [2021-12-21 14:35:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:35:00,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:35:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:35:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:35:00,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:35:00,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763225813] [2021-12-21 14:35:00,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763225813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:35:00,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:35:00,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:35:00,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993404773] [2021-12-21 14:35:00,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:35:00,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:35:00,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:35:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:35:00,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:35:00,103 INFO L87 Difference]: Start difference. First operand 8274 states and 11790 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 14:35:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:35:00,780 INFO L93 Difference]: Finished difference Result 12948 states and 18347 transitions. [2021-12-21 14:35:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:35:00,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 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 79 [2021-12-21 14:35:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:35:00,800 INFO L225 Difference]: With dead ends: 12948 [2021-12-21 14:35:00,800 INFO L226 Difference]: Without dead ends: 11890 [2021-12-21 14:35:00,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:35:00,806 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4737 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:35:00,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4737 Valid, 3346 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:35:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2021-12-21 14:35:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2021-12-21 14:35:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4217409948542024) internal successors, (13262), 9329 states have internal predecessors, (13262), 0 states have call successors, (0), 0 states 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 14:35:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13262 transitions. [2021-12-21 14:35:01,457 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13262 transitions. Word has length 79 [2021-12-21 14:35:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:35:01,458 INFO L470 AbstractCegarLoop]: Abstraction has 9330 states and 13262 transitions. [2021-12-21 14:35:01,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 14:35:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13262 transitions. [2021-12-21 14:35:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-21 14:35:01,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:35:01,460 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] [2021-12-21 14:35:01,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:35:01,461 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:35:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:35:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-12-21 14:35:01,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:35:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443536624] [2021-12-21 14:35:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:35:01,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:35:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:35:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:35:01,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:35:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443536624] [2021-12-21 14:35:01,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443536624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:35:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029741140] [2021-12-21 14:35:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:35:01,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:35:01,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:35:01,607 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 14:35:01,668 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 14:35:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:35:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 14:35:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:35:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:35:01,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:35:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:35:02,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029741140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:35:02,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:35:02,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2021-12-21 14:35:02,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938980043] [2021-12-21 14:35:02,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:35:02,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:35:02,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:35:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:35:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:35:02,252 INFO L87 Difference]: Start difference. First operand 9330 states and 13262 transitions. Second operand has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 14:35:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:35:03,988 INFO L93 Difference]: Finished difference Result 29951 states and 42120 transitions. [2021-12-21 14:35:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 14:35:03,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-21 14:35:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:35:04,021 INFO L225 Difference]: With dead ends: 29951 [2021-12-21 14:35:04,022 INFO L226 Difference]: Without dead ends: 24141 [2021-12-21 14:35:04,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:35:04,032 INFO L933 BasicCegarLoop]: 1602 mSDtfsCounter, 3299 mSDsluCounter, 4877 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3299 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:35:04,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3299 Valid, 6479 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:35:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24141 states. [2021-12-21 14:35:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24141 to 23970. [2021-12-21 14:35:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23970 states, 23968 states have (on average 1.376919225634179) internal successors, (33002), 23969 states have internal predecessors, (33002), 0 states have call successors, (0), 0 states 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 14:35:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23970 states to 23970 states and 33002 transitions. [2021-12-21 14:35:05,674 INFO L78 Accepts]: Start accepts. Automaton has 23970 states and 33002 transitions. Word has length 80 [2021-12-21 14:35:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:35:05,675 INFO L470 AbstractCegarLoop]: Abstraction has 23970 states and 33002 transitions. [2021-12-21 14:35:05,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 14:35:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 23970 states and 33002 transitions. [2021-12-21 14:35:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 14:35:05,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:35:05,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:35:05,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:35:05,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 14:35:05,895 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:35:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:35:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1057956914, now seen corresponding path program 1 times [2021-12-21 14:35:05,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:35:05,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102974872] [2021-12-21 14:35:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:35:05,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:35:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:35:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:35:06,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:35:06,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102974872] [2021-12-21 14:35:06,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102974872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:35:06,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529077326] [2021-12-21 14:35:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:35:06,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:35:06,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:35:06,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:35:06,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:35:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:35:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 14:35:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:35:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:35:06,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:35:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:35:07,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529077326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:35:07,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:35:07,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-21 14:35:07,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429445366] [2021-12-21 14:35:07,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:35:07,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 14:35:07,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:35:07,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 14:35:07,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-12-21 14:35:07,366 INFO L87 Difference]: Start difference. First operand 23970 states and 33002 transitions. Second operand has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 29 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)