./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.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.5.ufo.UNBOUNDED.pals+Problem12_label09.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 0bbf22098def83a979a93dd8fa66adb7d528ee9621686d1c01784de1384e9197 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:39:41,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:39:41,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:39:42,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:39:42,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:39:42,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:39:42,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:39:42,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:39:42,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:39:42,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:39:42,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:39:42,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:39:42,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:39:42,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:39:42,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:39:42,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:39:42,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:39:42,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:39:42,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:39:42,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:39:42,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:39:42,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:39:42,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:39:42,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:39:42,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:39:42,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:39:42,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:39:42,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:39:42,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:39:42,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:39:42,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:39:42,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:39:42,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:39:42,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:39:42,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:39:42,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:39:42,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:39:42,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:39:42,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:39:42,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:39:42,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:39:42,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:39:42,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:39:42,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:39:42,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:39:42,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:39:42,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:39:42,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:39:42,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:39:42,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:39:42,081 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:39:42,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:39:42,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:39:42,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:39:42,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:39:42,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:39:42,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:39:42,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:39:42,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:39:42,083 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:39:42,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:39:42,083 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:39:42,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:39:42,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:39:42,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:39:42,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:39:42,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:39:42,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:39:42,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:39:42,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:39:42,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:39:42,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:39:42,085 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:39:42,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:39:42,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:39:42,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:39:42,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbf22098def83a979a93dd8fa66adb7d528ee9621686d1c01784de1384e9197 [2021-12-21 14:39:42,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:39:42,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:39:42,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:39:42,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:39:42,289 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:39:42,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-21 14:39:42,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a236732/ec58b876d4254fb48fc196c2405b6103/FLAG624b526f9 [2021-12-21 14:39:42,880 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:39:42,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-21 14:39:42,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a236732/ec58b876d4254fb48fc196c2405b6103/FLAG624b526f9 [2021-12-21 14:39:43,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a236732/ec58b876d4254fb48fc196c2405b6103 [2021-12-21 14:39:43,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:39:43,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:39:43,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:39:43,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:39:43,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:39:43,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:39:43" (1/1) ... [2021-12-21 14:39:43,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed4249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:43, skipping insertion in model container [2021-12-21 14:39:43,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:39:43" (1/1) ... [2021-12-21 14:39:43,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:39:43,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:39:43,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c[11668,11681] [2021-12-21 14:39:43,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c[19416,19429] [2021-12-21 14:39:43,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:39:43,912 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:39:43,933 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c[11668,11681] [2021-12-21 14:39:43,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c[19416,19429] [2021-12-21 14:39:44,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:39:44,233 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:39:44,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44 WrapperNode [2021-12-21 14:39:44,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:39:44,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:39:44,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:39:44,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:39:44,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,531 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5088 [2021-12-21 14:39:44,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:39:44,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:39:44,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:39:44,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:39:44,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:44,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:45,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:39:45,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:39:45,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:39:45,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:39:45,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (1/1) ... [2021-12-21 14:39:45,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:39:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:39:45,147 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 14:39:45,149 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 14:39:45,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:39:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:39:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:39:45,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:39:45,243 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:39:45,244 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:39:47,733 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:39:47,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:39:47,743 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 14:39:47,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:39:47 BoogieIcfgContainer [2021-12-21 14:39:47,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:39:47,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:39:47,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:39:47,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:39:47,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:39:43" (1/3) ... [2021-12-21 14:39:47,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3e2d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:39:47, skipping insertion in model container [2021-12-21 14:39:47,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:44" (2/3) ... [2021-12-21 14:39:47,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3e2d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:39:47, skipping insertion in model container [2021-12-21 14:39:47,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:39:47" (3/3) ... [2021-12-21 14:39:47,751 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-21 14:39:47,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:39:47,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:39:47,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:39:47,790 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 14:39:47,790 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:39:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states 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 14:39:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 14:39:47,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:47,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:47,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2021-12-21 14:39:47,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:47,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148221809] [2021-12-21 14:39:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:47,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:47,937 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 14:39:47,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148221809] [2021-12-21 14:39:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148221809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:47,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:47,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:39:47,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848827418] [2021-12-21 14:39:47,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:47,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 14:39:47,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 14:39:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 14:39:47,964 INFO L87 Difference]: Start difference. First operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 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 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:48,065 INFO L93 Difference]: Finished difference Result 1783 states and 3378 transitions. [2021-12-21 14:39:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 14:39:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 14:39:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:48,080 INFO L225 Difference]: With dead ends: 1783 [2021-12-21 14:39:48,080 INFO L226 Difference]: Without dead ends: 845 [2021-12-21 14:39:48,085 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 14:39:48,087 INFO L933 BasicCegarLoop]: 1656 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, 1656 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 14:39:48,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-21 14:39:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-21 14:39:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8884934756820877) internal successors, (1592), 844 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states 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 14:39:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1592 transitions. [2021-12-21 14:39:48,147 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1592 transitions. Word has length 34 [2021-12-21 14:39:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:48,147 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1592 transitions. [2021-12-21 14:39:48,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1592 transitions. [2021-12-21 14:39:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 14:39:48,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:48,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:48,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:39:48,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-12-21 14:39:48,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:48,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954946254] [2021-12-21 14:39:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:48,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:48,209 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 14:39:48,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954946254] [2021-12-21 14:39:48,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954946254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:48,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:48,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:39:48,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898820197] [2021-12-21 14:39:48,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:48,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:39:48,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:39:48,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:39:48,213 INFO L87 Difference]: Start difference. First operand 845 states and 1592 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:48,275 INFO L93 Difference]: Finished difference Result 903 states and 1681 transitions. [2021-12-21 14:39:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:39:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 14:39:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:48,279 INFO L225 Difference]: With dead ends: 903 [2021-12-21 14:39:48,279 INFO L226 Difference]: Without dead ends: 845 [2021-12-21 14:39:48,280 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 14:39:48,281 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:48,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6326 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-21 14:39:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-21 14:39:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8517200474495847) internal successors, (1561), 844 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 14:39:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1561 transitions. [2021-12-21 14:39:48,299 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1561 transitions. Word has length 34 [2021-12-21 14:39:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:48,299 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1561 transitions. [2021-12-21 14:39:48,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1561 transitions. [2021-12-21 14:39:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 14:39:48,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:48,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:48,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:39:48,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-12-21 14:39:48,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:48,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914385284] [2021-12-21 14:39:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:48,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:48,368 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 14:39:48,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914385284] [2021-12-21 14:39:48,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914385284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:48,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:48,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775896414] [2021-12-21 14:39:48,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:48,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:48,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:48,371 INFO L87 Difference]: Start difference. First operand 845 states and 1561 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:48,394 INFO L93 Difference]: Finished difference Result 947 states and 1721 transitions. [2021-12-21 14:39:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 14:39:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:48,398 INFO L225 Difference]: With dead ends: 947 [2021-12-21 14:39:48,398 INFO L226 Difference]: Without dead ends: 893 [2021-12-21 14:39:48,399 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 14:39:48,400 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1498 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1676 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 14:39:48,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1676 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-12-21 14:39:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 891. [2021-12-21 14:39:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 889 states have (on average 1.8380202474690663) internal successors, (1634), 890 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states 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 14:39:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1634 transitions. [2021-12-21 14:39:48,416 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1634 transitions. Word has length 64 [2021-12-21 14:39:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:48,416 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1634 transitions. [2021-12-21 14:39:48,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1634 transitions. [2021-12-21 14:39:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 14:39:48,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:48,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:48,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:39:48,418 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:48,419 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-12-21 14:39:48,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:48,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454088684] [2021-12-21 14:39:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:48,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:48,520 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 14:39:48,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454088684] [2021-12-21 14:39:48,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454088684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:48,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:48,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:48,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375460151] [2021-12-21 14:39:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:48,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:48,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:48,529 INFO L87 Difference]: Start difference. First operand 891 states and 1634 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:48,696 INFO L93 Difference]: Finished difference Result 1891 states and 3214 transitions. [2021-12-21 14:39:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:39:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 14:39:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:48,702 INFO L225 Difference]: With dead ends: 1891 [2021-12-21 14:39:48,702 INFO L226 Difference]: Without dead ends: 1791 [2021-12-21 14:39:48,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-21 14:39:48,704 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 8419 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8419 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:48,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8419 Valid, 2463 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:39:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-12-21 14:39:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 989. [2021-12-21 14:39:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 987 states have (on average 1.8105369807497467) internal successors, (1787), 988 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states 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 14:39:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1787 transitions. [2021-12-21 14:39:48,729 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1787 transitions. Word has length 64 [2021-12-21 14:39:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:48,729 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1787 transitions. [2021-12-21 14:39:48,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1787 transitions. [2021-12-21 14:39:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:48,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:48,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:48,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:39:48,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-12-21 14:39:48,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:48,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601299494] [2021-12-21 14:39:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:48,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:48,774 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 14:39:48,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601299494] [2021-12-21 14:39:48,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601299494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:48,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:48,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:48,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538375855] [2021-12-21 14:39:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:48,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:48,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:48,777 INFO L87 Difference]: Start difference. First operand 989 states and 1787 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:48,817 INFO L93 Difference]: Finished difference Result 1363 states and 2371 transitions. [2021-12-21 14:39:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:48,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:48,822 INFO L225 Difference]: With dead ends: 1363 [2021-12-21 14:39:48,822 INFO L226 Difference]: Without dead ends: 1165 [2021-12-21 14:39:48,823 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 14:39:48,826 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:48,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1635 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-21 14:39:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1159. [2021-12-21 14:39:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1157 states have (on average 1.7675021607605876) internal successors, (2045), 1158 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states 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 14:39:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2045 transitions. [2021-12-21 14:39:48,857 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2045 transitions. Word has length 66 [2021-12-21 14:39:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:48,861 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 2045 transitions. [2021-12-21 14:39:48,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2045 transitions. [2021-12-21 14:39:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:48,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:48,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:48,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:39:48,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-12-21 14:39:48,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677843698] [2021-12-21 14:39:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:48,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:49,036 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 14:39:49,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677843698] [2021-12-21 14:39:49,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677843698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:49,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:49,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:49,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712028599] [2021-12-21 14:39:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:49,043 INFO L87 Difference]: Start difference. First operand 1159 states and 2045 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:49,193 INFO L93 Difference]: Finished difference Result 1529 states and 2615 transitions. [2021-12-21 14:39:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:49,198 INFO L225 Difference]: With dead ends: 1529 [2021-12-21 14:39:49,198 INFO L226 Difference]: Without dead ends: 1161 [2021-12-21 14:39:49,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:39:49,199 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 6156 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6156 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:49,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6156 Valid, 1893 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-12-21 14:39:49,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2021-12-21 14:39:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1157 states have (on average 1.7640449438202248) internal successors, (2041), 1158 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states 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 14:39:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2041 transitions. [2021-12-21 14:39:49,229 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2041 transitions. Word has length 66 [2021-12-21 14:39:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:49,229 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 2041 transitions. [2021-12-21 14:39:49,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2041 transitions. [2021-12-21 14:39:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:49,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:49,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:49,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:39:49,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-12-21 14:39:49,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246118869] [2021-12-21 14:39:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:49,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:49,259 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 14:39:49,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:49,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246118869] [2021-12-21 14:39:49,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246118869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:49,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:49,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:49,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954460046] [2021-12-21 14:39:49,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:49,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:49,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:49,261 INFO L87 Difference]: Start difference. First operand 1159 states and 2041 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:49,304 INFO L93 Difference]: Finished difference Result 1847 states and 3091 transitions. [2021-12-21 14:39:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:49,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:49,309 INFO L225 Difference]: With dead ends: 1847 [2021-12-21 14:39:49,309 INFO L226 Difference]: Without dead ends: 1479 [2021-12-21 14:39:49,310 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 14:39:49,311 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1502 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1686 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 14:39:49,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1686 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-12-21 14:39:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1477. [2021-12-21 14:39:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1475 states have (on average 1.7064406779661017) internal successors, (2517), 1476 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states 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 14:39:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2517 transitions. [2021-12-21 14:39:49,434 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2517 transitions. Word has length 66 [2021-12-21 14:39:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:49,435 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 2517 transitions. [2021-12-21 14:39:49,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2517 transitions. [2021-12-21 14:39:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:49,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:49,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:49,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:39:49,436 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-12-21 14:39:49,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:49,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484713814] [2021-12-21 14:39:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:49,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:49,467 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 14:39:49,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484713814] [2021-12-21 14:39:49,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484713814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:49,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:49,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:49,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235628172] [2021-12-21 14:39:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:49,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:49,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:49,469 INFO L87 Difference]: Start difference. First operand 1477 states and 2517 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:49,523 INFO L93 Difference]: Finished difference Result 2753 states and 4439 transitions. [2021-12-21 14:39:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:49,529 INFO L225 Difference]: With dead ends: 2753 [2021-12-21 14:39:49,529 INFO L226 Difference]: Without dead ends: 2067 [2021-12-21 14:39:49,530 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 14:39:49,532 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1506 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1695 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 14:39:49,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-12-21 14:39:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2065. [2021-12-21 14:39:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2063 states have (on average 1.6388754241396024) internal successors, (3381), 2064 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states 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 14:39:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3381 transitions. [2021-12-21 14:39:49,593 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3381 transitions. Word has length 66 [2021-12-21 14:39:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:49,594 INFO L470 AbstractCegarLoop]: Abstraction has 2065 states and 3381 transitions. [2021-12-21 14:39:49,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3381 transitions. [2021-12-21 14:39:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:49,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:49,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:49,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:39:49,597 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-12-21 14:39:49,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:49,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059962569] [2021-12-21 14:39:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:49,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:49,623 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 14:39:49,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:49,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059962569] [2021-12-21 14:39:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059962569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:49,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:49,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:49,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347578670] [2021-12-21 14:39:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:49,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:49,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:49,625 INFO L87 Difference]: Start difference. First operand 2065 states and 3381 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:49,716 INFO L93 Difference]: Finished difference Result 4421 states and 6871 transitions. [2021-12-21 14:39:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:49,725 INFO L225 Difference]: With dead ends: 4421 [2021-12-21 14:39:49,725 INFO L226 Difference]: Without dead ends: 3147 [2021-12-21 14:39:49,727 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 14:39:49,727 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1510 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:49,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-12-21 14:39:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3145. [2021-12-21 14:39:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3143 states have (on average 1.5695195672923958) internal successors, (4933), 3144 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states 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 14:39:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 4933 transitions. [2021-12-21 14:39:49,830 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 4933 transitions. Word has length 66 [2021-12-21 14:39:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:49,830 INFO L470 AbstractCegarLoop]: Abstraction has 3145 states and 4933 transitions. [2021-12-21 14:39:49,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 4933 transitions. [2021-12-21 14:39:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:39:49,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:49,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:49,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:39:49,832 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:49,832 INFO L85 PathProgramCache]: Analyzing trace with hash 618821252, now seen corresponding path program 1 times [2021-12-21 14:39:49,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:49,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220553565] [2021-12-21 14:39:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:49,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:49,869 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 14:39:49,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220553565] [2021-12-21 14:39:49,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220553565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:49,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:49,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:49,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311725140] [2021-12-21 14:39:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:49,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:39:49,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:39:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:39:49,871 INFO L87 Difference]: Start difference. First operand 3145 states and 4933 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:54,734 INFO L93 Difference]: Finished difference Result 5400 states and 9242 transitions. [2021-12-21 14:39:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:39:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-21 14:39:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:54,747 INFO L225 Difference]: With dead ends: 5400 [2021-12-21 14:39:54,747 INFO L226 Difference]: Without dead ends: 4647 [2021-12-21 14:39:54,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:39:54,750 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 2424 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 6404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:54,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2424 Valid, 833 Invalid, 6404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-21 14:39:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2021-12-21 14:39:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4647. [2021-12-21 14:39:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4645 states have (on average 1.48740581270183) internal successors, (6909), 4646 states have internal predecessors, (6909), 0 states have call successors, (0), 0 states 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 14:39:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 6909 transitions. [2021-12-21 14:39:54,885 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 6909 transitions. Word has length 67 [2021-12-21 14:39:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:54,885 INFO L470 AbstractCegarLoop]: Abstraction has 4647 states and 6909 transitions. [2021-12-21 14:39:54,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 6909 transitions. [2021-12-21 14:39:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:39:54,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:54,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:54,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:39:54,887 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-12-21 14:39:54,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:54,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308670832] [2021-12-21 14:39:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:54,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:55,011 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 14:39:55,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308670832] [2021-12-21 14:39:55,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308670832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:55,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:55,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:39:55,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888190117] [2021-12-21 14:39:55,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:55,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:39:55,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:39:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:39:55,014 INFO L87 Difference]: Start difference. First operand 4647 states and 6909 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:55,294 INFO L93 Difference]: Finished difference Result 6405 states and 9443 transitions. [2021-12-21 14:39:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-21 14:39:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:55,323 INFO L225 Difference]: With dead ends: 6405 [2021-12-21 14:39:55,323 INFO L226 Difference]: Without dead ends: 6403 [2021-12-21 14:39:55,326 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 14:39:55,327 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 225 mSDsluCounter, 4685 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 6291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:55,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 6291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2021-12-21 14:39:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 4743. [2021-12-21 14:39:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4741 states have (on average 1.4741615692891794) internal successors, (6989), 4742 states have internal predecessors, (6989), 0 states have call successors, (0), 0 states 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 14:39:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6989 transitions. [2021-12-21 14:39:55,550 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6989 transitions. Word has length 67 [2021-12-21 14:39:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:55,550 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 6989 transitions. [2021-12-21 14:39:55,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6989 transitions. [2021-12-21 14:39:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:39:55,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:55,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:55,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:39:55,552 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-12-21 14:39:55,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991698573] [2021-12-21 14:39:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:55,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:55,591 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 14:39:55,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:55,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991698573] [2021-12-21 14:39:55,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991698573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:55,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:55,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:55,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277062730] [2021-12-21 14:39:55,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:55,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:55,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:55,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:55,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:55,594 INFO L87 Difference]: Start difference. First operand 4743 states and 6989 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:55,842 INFO L93 Difference]: Finished difference Result 7246 states and 10643 transitions. [2021-12-21 14:39:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:55,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-21 14:39:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:55,851 INFO L225 Difference]: With dead ends: 7246 [2021-12-21 14:39:55,851 INFO L226 Difference]: Without dead ends: 5867 [2021-12-21 14:39:55,854 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 14:39:55,854 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 1511 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1708 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 14:39:55,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1708 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-12-21 14:39:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 5865. [2021-12-21 14:39:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 5863 states have (on average 1.4625618284154869) internal successors, (8575), 5864 states have internal predecessors, (8575), 0 states have call successors, (0), 0 states 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 14:39:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 8575 transitions. [2021-12-21 14:39:56,168 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 8575 transitions. Word has length 68 [2021-12-21 14:39:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:56,169 INFO L470 AbstractCegarLoop]: Abstraction has 5865 states and 8575 transitions. [2021-12-21 14:39:56,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 8575 transitions. [2021-12-21 14:39:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:39:56,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:56,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:56,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:39:56,171 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -482219864, now seen corresponding path program 1 times [2021-12-21 14:39:56,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036849409] [2021-12-21 14:39:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:56,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:39:56,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:56,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036849409] [2021-12-21 14:39:56,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036849409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:56,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:56,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:56,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232705149] [2021-12-21 14:39:56,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:56,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:56,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:56,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:56,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:56,242 INFO L87 Difference]: Start difference. First operand 5865 states and 8575 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:39:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:57,329 INFO L93 Difference]: Finished difference Result 24437 states and 35173 transitions. [2021-12-21 14:39:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 95 [2021-12-21 14:39:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:57,357 INFO L225 Difference]: With dead ends: 24437 [2021-12-21 14:39:57,358 INFO L226 Difference]: Without dead ends: 20867 [2021-12-21 14:39:57,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:39:57,365 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6639 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6639 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:57,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6639 Valid, 3585 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:39:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20867 states. [2021-12-21 14:39:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20867 to 9433. [2021-12-21 14:39:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9433 states, 9431 states have (on average 1.447036369419998) internal successors, (13647), 9432 states have internal predecessors, (13647), 0 states have call successors, (0), 0 states 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 14:39:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9433 states to 9433 states and 13647 transitions. [2021-12-21 14:39:57,807 INFO L78 Accepts]: Start accepts. Automaton has 9433 states and 13647 transitions. Word has length 95 [2021-12-21 14:39:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:57,807 INFO L470 AbstractCegarLoop]: Abstraction has 9433 states and 13647 transitions. [2021-12-21 14:39:57,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:39:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 9433 states and 13647 transitions. [2021-12-21 14:39:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:39:57,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:57,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:57,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:39:57,810 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash -452697646, now seen corresponding path program 1 times [2021-12-21 14:39:57,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392884011] [2021-12-21 14:39:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:57,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:39:57,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:57,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392884011] [2021-12-21 14:39:57,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392884011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:57,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:57,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:57,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219104928] [2021-12-21 14:39:57,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:57,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:57,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:57,867 INFO L87 Difference]: Start difference. First operand 9433 states and 13647 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 14:39:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:59,006 INFO L93 Difference]: Finished difference Result 28005 states and 40245 transitions. [2021-12-21 14:39:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-21 14:39:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:59,042 INFO L225 Difference]: With dead ends: 28005 [2021-12-21 14:39:59,043 INFO L226 Difference]: Without dead ends: 24435 [2021-12-21 14:39:59,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:39:59,053 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6527 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6527 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:59,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6527 Valid, 3644 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:59,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24435 states. [2021-12-21 14:40:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24435 to 14793. [2021-12-21 14:40:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14793 states, 14791 states have (on average 1.4343181664525726) internal successors, (21215), 14792 states have internal predecessors, (21215), 0 states have call successors, (0), 0 states 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 14:40:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14793 states to 14793 states and 21215 transitions. [2021-12-21 14:40:00,063 INFO L78 Accepts]: Start accepts. Automaton has 14793 states and 21215 transitions. Word has length 95 [2021-12-21 14:40:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:00,064 INFO L470 AbstractCegarLoop]: Abstraction has 14793 states and 21215 transitions. [2021-12-21 14:40:00,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 14:40:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 14793 states and 21215 transitions. [2021-12-21 14:40:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:40:00,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:00,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:00,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:40:00,067 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:00,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:00,067 INFO L85 PathProgramCache]: Analyzing trace with hash -179009934, now seen corresponding path program 1 times [2021-12-21 14:40:00,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274632878] [2021-12-21 14:40:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:00,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 14:40:00,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:00,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274632878] [2021-12-21 14:40:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274632878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:00,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:00,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:40:00,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296031787] [2021-12-21 14:40:00,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:00,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:40:00,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:00,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:40:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:40:00,118 INFO L87 Difference]: Start difference. First operand 14793 states and 21215 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 14:40:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:01,582 INFO L93 Difference]: Finished difference Result 31573 states and 45317 transitions. [2021-12-21 14:40:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:40:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-21 14:40:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:01,618 INFO L225 Difference]: With dead ends: 31573 [2021-12-21 14:40:01,619 INFO L226 Difference]: Without dead ends: 28003 [2021-12-21 14:40:01,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:40:01,627 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6537 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6537 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:01,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6537 Valid, 3676 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:40:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28003 states. [2021-12-21 14:40:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28003 to 18361. [2021-12-21 14:40:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18361 states, 18359 states have (on average 1.431831799117599) internal successors, (26287), 18360 states have internal predecessors, (26287), 0 states have call successors, (0), 0 states 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 14:40:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18361 states to 18361 states and 26287 transitions. [2021-12-21 14:40:02,631 INFO L78 Accepts]: Start accepts. Automaton has 18361 states and 26287 transitions. Word has length 95 [2021-12-21 14:40:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:02,632 INFO L470 AbstractCegarLoop]: Abstraction has 18361 states and 26287 transitions. [2021-12-21 14:40:02,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 14:40:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 18361 states and 26287 transitions. [2021-12-21 14:40:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:40:02,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:02,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:02,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:40:02,635 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1640061714, now seen corresponding path program 1 times [2021-12-21 14:40:02,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:02,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682833091] [2021-12-21 14:40:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:02,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 14:40:02,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682833091] [2021-12-21 14:40:02,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682833091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:02,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:02,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:40:02,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633099545] [2021-12-21 14:40:02,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:02,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:40:02,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:40:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:40:02,686 INFO L87 Difference]: Start difference. First operand 18361 states and 26287 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:04,670 INFO L93 Difference]: Finished difference Result 35141 states and 50389 transitions. [2021-12-21 14:40:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:40:04,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-21 14:40:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:04,716 INFO L225 Difference]: With dead ends: 35141 [2021-12-21 14:40:04,716 INFO L226 Difference]: Without dead ends: 31571 [2021-12-21 14:40:04,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:40:04,727 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6612 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6612 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:04,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6612 Valid, 3623 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31571 states. [2021-12-21 14:40:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31571 to 21929. [2021-12-21 14:40:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 21927 states have (on average 1.430154603912984) internal successors, (31359), 21928 states have internal predecessors, (31359), 0 states have call successors, (0), 0 states 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 14:40:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 31359 transitions. [2021-12-21 14:40:06,157 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 31359 transitions. Word has length 95 [2021-12-21 14:40:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:06,158 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 31359 transitions. [2021-12-21 14:40:06,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 31359 transitions. [2021-12-21 14:40:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 14:40:06,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:06,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:06,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:40:06,163 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -906023264, now seen corresponding path program 1 times [2021-12-21 14:40:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845549229] [2021-12-21 14:40:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:06,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:06,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:06,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845549229] [2021-12-21 14:40:06,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845549229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:06,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:06,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:40:06,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60987002] [2021-12-21 14:40:06,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:06,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:40:06,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:40:06,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:40:06,211 INFO L87 Difference]: Start difference. First operand 21929 states and 31359 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 14:40:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:07,160 INFO L93 Difference]: Finished difference Result 35691 states and 51109 transitions. [2021-12-21 14:40:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:40:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-21 14:40:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:07,181 INFO L225 Difference]: With dead ends: 35691 [2021-12-21 14:40:07,181 INFO L226 Difference]: Without dead ends: 16057 [2021-12-21 14:40:07,194 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 14:40:07,194 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 54 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:07,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3146 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16057 states. [2021-12-21 14:40:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16057 to 16055. [2021-12-21 14:40:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16055 states, 16053 states have (on average 1.4343736373263565) internal successors, (23026), 16054 states have internal predecessors, (23026), 0 states have call successors, (0), 0 states 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 14:40:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16055 states to 16055 states and 23026 transitions. [2021-12-21 14:40:08,170 INFO L78 Accepts]: Start accepts. Automaton has 16055 states and 23026 transitions. Word has length 97 [2021-12-21 14:40:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 16055 states and 23026 transitions. [2021-12-21 14:40:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 14:40:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 16055 states and 23026 transitions. [2021-12-21 14:40:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 14:40:08,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:08,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:08,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:40:08,174 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:08,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:08,175 INFO L85 PathProgramCache]: Analyzing trace with hash -615309075, now seen corresponding path program 1 times [2021-12-21 14:40:08,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:08,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084806021] [2021-12-21 14:40:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:08,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:40:08,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:08,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084806021] [2021-12-21 14:40:08,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084806021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:08,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:08,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:40:08,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654682345] [2021-12-21 14:40:08,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:08,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:40:08,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:40:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:40:08,231 INFO L87 Difference]: Start difference. First operand 16055 states and 23026 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 14:40:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:09,890 INFO L93 Difference]: Finished difference Result 28547 states and 40952 transitions. [2021-12-21 14:40:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:40:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 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 97 [2021-12-21 14:40:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:09,951 INFO L225 Difference]: With dead ends: 28547 [2021-12-21 14:40:09,967 INFO L226 Difference]: Without dead ends: 26049 [2021-12-21 14:40:09,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:40:09,979 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 6590 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6590 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:09,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6590 Valid, 3594 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26049 states. [2021-12-21 14:40:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26049 to 18551. [2021-12-21 14:40:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18551 states, 18549 states have (on average 1.4328535231009758) internal successors, (26578), 18550 states have internal predecessors, (26578), 0 states have call successors, (0), 0 states 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 14:40:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18551 states to 18551 states and 26578 transitions. [2021-12-21 14:40:11,807 INFO L78 Accepts]: Start accepts. Automaton has 18551 states and 26578 transitions. Word has length 97 [2021-12-21 14:40:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:11,808 INFO L470 AbstractCegarLoop]: Abstraction has 18551 states and 26578 transitions. [2021-12-21 14:40:11,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 14:40:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 18551 states and 26578 transitions. [2021-12-21 14:40:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:11,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:11,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:11,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:40:11,812 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash -605888281, now seen corresponding path program 1 times [2021-12-21 14:40:11,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:11,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449680894] [2021-12-21 14:40:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:11,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:11,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449680894] [2021-12-21 14:40:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449680894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:11,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:11,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:40:11,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550501594] [2021-12-21 14:40:11,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:11,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:40:11,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:11,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:40:11,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:40:11,857 INFO L87 Difference]: Start difference. First operand 18551 states and 26578 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:40:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:12,550 INFO L93 Difference]: Finished difference Result 26667 states and 38124 transitions. [2021-12-21 14:40:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:40:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-21 14:40:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:12,560 INFO L225 Difference]: With dead ends: 26667 [2021-12-21 14:40:12,560 INFO L226 Difference]: Without dead ends: 10441 [2021-12-21 14:40:12,571 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 14:40:12,572 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 48 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:12,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10441 states. [2021-12-21 14:40:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10441 to 10439. [2021-12-21 14:40:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10439 states, 10437 states have (on average 1.4304876880329596) internal successors, (14930), 10438 states have internal predecessors, (14930), 0 states have call successors, (0), 0 states 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 14:40:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10439 states to 10439 states and 14930 transitions. [2021-12-21 14:40:13,153 INFO L78 Accepts]: Start accepts. Automaton has 10439 states and 14930 transitions. Word has length 98 [2021-12-21 14:40:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:13,153 INFO L470 AbstractCegarLoop]: Abstraction has 10439 states and 14930 transitions. [2021-12-21 14:40:13,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:40:13,153 INFO L276 IsEmpty]: Start isEmpty. Operand 10439 states and 14930 transitions. [2021-12-21 14:40:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:13,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:13,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:13,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:40:13,156 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1773467421, now seen corresponding path program 1 times [2021-12-21 14:40:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:13,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518262894] [2021-12-21 14:40:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:13,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:13,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:13,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518262894] [2021-12-21 14:40:13,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518262894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:13,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:13,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:40:13,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810575945] [2021-12-21 14:40:13,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:13,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:40:13,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:13,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:40:13,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:40:13,183 INFO L87 Difference]: Start difference. First operand 10439 states and 14930 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:40:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:13,481 INFO L93 Difference]: Finished difference Result 14499 states and 20652 transitions. [2021-12-21 14:40:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:40:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-21 14:40:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:13,489 INFO L225 Difference]: With dead ends: 14499 [2021-12-21 14:40:13,489 INFO L226 Difference]: Without dead ends: 6385 [2021-12-21 14:40:13,495 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 14:40:13,495 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 44 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:13,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6385 states. [2021-12-21 14:40:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6385 to 6383. [2021-12-21 14:40:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6381 states have (on average 1.435198244789218) internal successors, (9158), 6382 states have internal predecessors, (9158), 0 states have call successors, (0), 0 states 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 14:40:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 9158 transitions. [2021-12-21 14:40:13,803 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 9158 transitions. Word has length 98 [2021-12-21 14:40:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:13,803 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 9158 transitions. [2021-12-21 14:40:13,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:40:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 9158 transitions. [2021-12-21 14:40:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:13,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:13,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:13,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:40:13,805 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:13,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash -934897581, now seen corresponding path program 1 times [2021-12-21 14:40:13,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:13,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480716085] [2021-12-21 14:40:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:13,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:13,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:13,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480716085] [2021-12-21 14:40:13,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480716085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:13,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:13,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:40:13,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76637793] [2021-12-21 14:40:13,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:13,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:40:13,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:40:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:40:13,833 INFO L87 Difference]: Start difference. First operand 6383 states and 9158 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:40:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:13,996 INFO L93 Difference]: Finished difference Result 8415 states and 11994 transitions. [2021-12-21 14:40:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:40:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-21 14:40:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:14,000 INFO L225 Difference]: With dead ends: 8415 [2021-12-21 14:40:14,000 INFO L226 Difference]: Without dead ends: 4357 [2021-12-21 14:40:14,002 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 14:40:14,003 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 40 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:14,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2021-12-21 14:40:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4355. [2021-12-21 14:40:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4355 states, 4353 states have (on average 1.4468182862393753) internal successors, (6298), 4354 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states 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 14:40:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4355 states to 4355 states and 6298 transitions. [2021-12-21 14:40:14,170 INFO L78 Accepts]: Start accepts. Automaton has 4355 states and 6298 transitions. Word has length 98 [2021-12-21 14:40:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:14,171 INFO L470 AbstractCegarLoop]: Abstraction has 4355 states and 6298 transitions. [2021-12-21 14:40:14,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:40:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4355 states and 6298 transitions. [2021-12-21 14:40:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:14,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:14,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:14,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:40:14,173 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1022016375, now seen corresponding path program 1 times [2021-12-21 14:40:14,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:14,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721195210] [2021-12-21 14:40:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:14,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:14,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:14,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721195210] [2021-12-21 14:40:14,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721195210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:40:14,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107104075] [2021-12-21 14:40:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:14,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:40:14,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:40:14,347 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 14:40:14,348 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 14:40:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:14,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 14:40:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:40:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:40:14,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:40:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:40:15,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107104075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:40:15,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:40:15,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-21 14:40:15,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501029632] [2021-12-21 14:40:15,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:40:15,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 14:40:15,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:15,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 14:40:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-21 14:40:15,015 INFO L87 Difference]: Start difference. First operand 4355 states and 6298 transitions. Second operand has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 14:40:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:19,306 INFO L93 Difference]: Finished difference Result 29531 states and 40482 transitions. [2021-12-21 14:40:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-21 14:40:19,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 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 98 [2021-12-21 14:40:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:19,336 INFO L225 Difference]: With dead ends: 29531 [2021-12-21 14:40:19,336 INFO L226 Difference]: Without dead ends: 27501 [2021-12-21 14:40:19,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-21 14:40:19,344 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 14633 mSDsluCounter, 5549 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14633 SdHoareTripleChecker+Valid, 7123 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:19,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14633 Valid, 7123 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:40:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27501 states. [2021-12-21 14:40:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27501 to 19602. [2021-12-21 14:40:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19602 states, 19600 states have (on average 1.3460714285714286) internal successors, (26383), 19601 states have internal predecessors, (26383), 0 states have call successors, (0), 0 states 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 14:40:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19602 states to 19602 states and 26383 transitions. [2021-12-21 14:40:20,852 INFO L78 Accepts]: Start accepts. Automaton has 19602 states and 26383 transitions. Word has length 98 [2021-12-21 14:40:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:20,853 INFO L470 AbstractCegarLoop]: Abstraction has 19602 states and 26383 transitions. [2021-12-21 14:40:20,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 14:40:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 19602 states and 26383 transitions. [2021-12-21 14:40:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 14:40:20,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:20,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:20,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 14:40:21,075 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,SelfDestructingSolverStorable21 [2021-12-21 14:40:21,076 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:21,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:21,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1244176043, now seen corresponding path program 1 times [2021-12-21 14:40:21,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:21,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047123715] [2021-12-21 14:40:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:21,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:21,328 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 14:40:21,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:21,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047123715] [2021-12-21 14:40:21,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047123715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:40:21,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175151246] [2021-12-21 14:40:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:21,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:40:21,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:40:21,344 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 14:40:21,347 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 14:40:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 14:40:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:40:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:22,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:40:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:22,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175151246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:40:22,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:40:22,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-21 14:40:22,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565440544] [2021-12-21 14:40:22,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:40:22,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 14:40:22,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 14:40:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-12-21 14:40:22,925 INFO L87 Difference]: Start difference. First operand 19602 states and 26383 transitions. Second operand has 30 states, 30 states have (on average 8.433333333333334) internal successors, (253), 29 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)