./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0217.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:02:56,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:02:56,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:02:56,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:02:56,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:02:56,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:02:56,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:02:56,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:02:56,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:02:56,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:02:56,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:02:56,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:02:56,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:02:56,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:02:56,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:02:56,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:02:56,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:02:56,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:02:56,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:02:56,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:02:56,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:02:56,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:02:56,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:02:56,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:02:56,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:02:56,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:02:56,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:02:56,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:02:56,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:02:56,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:02:56,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:02:56,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:02:56,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:02:56,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:02:56,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:02:56,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:02:56,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:02:56,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:02:56,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:02:56,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:02:56,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:02:56,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:02:56,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:02:56,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:02:56,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:02:56,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:02:56,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:02:56,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:02:56,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:02:56,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:02:56,430 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:02:56,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:02:56,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:02:56,432 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:02:56,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:02:56,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:02:56,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:02:56,432 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:02:56,432 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:02:56,432 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:02:56,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:02:56,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:02:56,433 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:02:56,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:02:56,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:02:56,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:02:56,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:02:56,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:02:56,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:02:56,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:02:56,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:02:56,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:02:56,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:02:56,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2021-12-22 00:02:56,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:02:56,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:02:56,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:02:56,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:02:56,669 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:02:56,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0217.i [2021-12-22 00:02:56,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ec32178/9ff31ee2ab9d49a995e740396f8a28f0/FLAGab8eb3699 [2021-12-22 00:02:57,306 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:02:57,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0217.i [2021-12-22 00:02:57,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ec32178/9ff31ee2ab9d49a995e740396f8a28f0/FLAGab8eb3699 [2021-12-22 00:02:57,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ec32178/9ff31ee2ab9d49a995e740396f8a28f0 [2021-12-22 00:02:57,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:02:57,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:02:57,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:02:57,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:02:57,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:02:57,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:02:57" (1/1) ... [2021-12-22 00:02:57,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb1a825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:57, skipping insertion in model container [2021-12-22 00:02:57,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:02:57" (1/1) ... [2021-12-22 00:02:57,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:02:57,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:02:58,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:02:58,054 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:02:58,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:02:58,122 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:02:58,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58 WrapperNode [2021-12-22 00:02:58,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:02:58,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:02:58,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:02:58,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:02:58,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,173 INFO L137 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 218 [2021-12-22 00:02:58,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:02:58,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:02:58,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:02:58,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:02:58,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:02:58,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:02:58,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:02:58,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:02:58,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (1/1) ... [2021-12-22 00:02:58,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:02:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:02:58,267 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) [2021-12-22 00:02:58,269 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 [2021-12-22 00:02:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-22 00:02:58,308 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-22 00:02:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 00:02:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:02:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:02:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:02:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:02:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:02:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 00:02:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 00:02:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:02:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:02:58,473 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:02:58,489 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:02:59,024 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:02:59,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:02:59,031 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 00:02:59,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:02:59 BoogieIcfgContainer [2021-12-22 00:02:59,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:02:59,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:02:59,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:02:59,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:02:59,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:02:57" (1/3) ... [2021-12-22 00:02:59,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c78efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:02:59, skipping insertion in model container [2021-12-22 00:02:59,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58" (2/3) ... [2021-12-22 00:02:59,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c78efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:02:59, skipping insertion in model container [2021-12-22 00:02:59,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:02:59" (3/3) ... [2021-12-22 00:02:59,045 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0217.i [2021-12-22 00:02:59,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:02:59,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-12-22 00:02:59,129 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:02:59,134 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-22 00:02:59,134 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-12-22 00:02:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 100 states have (on average 1.94) internal successors, (194), 167 states have internal predecessors, (194), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:02:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 00:02:59,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:59,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 00:02:59,166 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:02:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:59,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1074949738, now seen corresponding path program 1 times [2021-12-22 00:02:59,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:59,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567878256] [2021-12-22 00:02:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:59,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:02:59,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:59,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567878256] [2021-12-22 00:02:59,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567878256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:59,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:59,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:02:59,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701856733] [2021-12-22 00:02:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:59,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 00:02:59,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 00:02:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 00:02:59,357 INFO L87 Difference]: Start difference. First operand has 171 states, 100 states have (on average 1.94) internal successors, (194), 167 states have internal predecessors, (194), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:59,395 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2021-12-22 00:02:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 00:02:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-22 00:02:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:59,407 INFO L225 Difference]: With dead ends: 171 [2021-12-22 00:02:59,408 INFO L226 Difference]: Without dead ends: 169 [2021-12-22 00:02:59,410 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 [2021-12-22 00:02:59,415 INFO L933 BasicCegarLoop]: 192 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, 192 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 [2021-12-22 00:02:59,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:02:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-22 00:02:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-22 00:02:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 99 states have (on average 1.878787878787879) internal successors, (186), 165 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:02:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2021-12-22 00:02:59,477 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 6 [2021-12-22 00:02:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:59,478 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2021-12-22 00:02:59,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2021-12-22 00:02:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:02:59,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:59,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:59,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:02:59,479 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:02:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317330, now seen corresponding path program 1 times [2021-12-22 00:02:59,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:59,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429743006] [2021-12-22 00:02:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:59,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:02:59,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:59,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429743006] [2021-12-22 00:02:59,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429743006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:59,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:59,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 00:02:59,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244869126] [2021-12-22 00:02:59,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:59,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:02:59,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:02:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:02:59,597 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:59,819 INFO L93 Difference]: Finished difference Result 329 states and 370 transitions. [2021-12-22 00:02:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:02:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-22 00:02:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:59,823 INFO L225 Difference]: With dead ends: 329 [2021-12-22 00:02:59,823 INFO L226 Difference]: Without dead ends: 329 [2021-12-22 00:02:59,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:02:59,824 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 171 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:59,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 249 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:02:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-22 00:02:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 233. [2021-12-22 00:02:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 160 states have (on average 1.8625) internal successors, (298), 226 states have internal predecessors, (298), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:02:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 306 transitions. [2021-12-22 00:02:59,855 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 306 transitions. Word has length 7 [2021-12-22 00:02:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:59,855 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 306 transitions. [2021-12-22 00:02:59,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 306 transitions. [2021-12-22 00:02:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:02:59,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:59,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:59,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:02:59,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:02:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317329, now seen corresponding path program 1 times [2021-12-22 00:02:59,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:59,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769246643] [2021-12-22 00:02:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:59,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:02:59,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769246643] [2021-12-22 00:02:59,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769246643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:59,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:59,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:02:59,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392182751] [2021-12-22 00:02:59,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:59,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:02:59,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:02:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:02:59,942 INFO L87 Difference]: Start difference. First operand 233 states and 306 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:00,104 INFO L93 Difference]: Finished difference Result 376 states and 474 transitions. [2021-12-22 00:03:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-22 00:03:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:00,106 INFO L225 Difference]: With dead ends: 376 [2021-12-22 00:03:00,107 INFO L226 Difference]: Without dead ends: 376 [2021-12-22 00:03:00,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:00,108 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 141 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:00,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 422 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-22 00:03:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 310. [2021-12-22 00:03:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 231 states have (on average 1.8225108225108224) internal successors, (421), 299 states have internal predecessors, (421), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 00:03:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2021-12-22 00:03:00,154 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 7 [2021-12-22 00:03:00,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:00,154 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2021-12-22 00:03:00,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:00,155 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2021-12-22 00:03:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:03:00,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:00,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 00:03:00,158 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317267, now seen corresponding path program 1 times [2021-12-22 00:03:00,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:00,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178332696] [2021-12-22 00:03:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:00,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:00,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:00,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178332696] [2021-12-22 00:03:00,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178332696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:00,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:00,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:03:00,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616078935] [2021-12-22 00:03:00,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:00,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:00,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:00,240 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:00,455 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2021-12-22 00:03:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-22 00:03:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:00,459 INFO L225 Difference]: With dead ends: 375 [2021-12-22 00:03:00,460 INFO L226 Difference]: Without dead ends: 375 [2021-12-22 00:03:00,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:00,462 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 123 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:00,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 436 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-22 00:03:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 310. [2021-12-22 00:03:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 231 states have (on average 1.8225108225108224) internal successors, (421), 299 states have internal predecessors, (421), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 00:03:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2021-12-22 00:03:00,474 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 7 [2021-12-22 00:03:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:00,474 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2021-12-22 00:03:00,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2021-12-22 00:03:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:03:00,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:00,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:00,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:03:00,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:00,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1671227278, now seen corresponding path program 1 times [2021-12-22 00:03:00,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:00,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940748307] [2021-12-22 00:03:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:00,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:00,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940748307] [2021-12-22 00:03:00,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940748307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:00,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:00,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:00,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975288424] [2021-12-22 00:03:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:00,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:00,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:00,630 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:00,850 INFO L93 Difference]: Finished difference Result 461 states and 621 transitions. [2021-12-22 00:03:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-22 00:03:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:00,855 INFO L225 Difference]: With dead ends: 461 [2021-12-22 00:03:00,855 INFO L226 Difference]: Without dead ends: 461 [2021-12-22 00:03:00,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:00,861 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 150 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:00,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 803 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-22 00:03:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 352. [2021-12-22 00:03:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 270 states have (on average 1.8074074074074074) internal successors, (488), 339 states have internal predecessors, (488), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 508 transitions. [2021-12-22 00:03:00,886 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 508 transitions. Word has length 10 [2021-12-22 00:03:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:00,888 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 508 transitions. [2021-12-22 00:03:00,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 508 transitions. [2021-12-22 00:03:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:03:00,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:00,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:00,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 00:03:00,889 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1673074320, now seen corresponding path program 1 times [2021-12-22 00:03:00,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:00,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512675254] [2021-12-22 00:03:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:00,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:01,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512675254] [2021-12-22 00:03:01,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512675254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:01,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696704733] [2021-12-22 00:03:01,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:01,005 INFO L87 Difference]: Start difference. First operand 352 states and 508 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:01,157 INFO L93 Difference]: Finished difference Result 451 states and 610 transitions. [2021-12-22 00:03:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-22 00:03:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:01,161 INFO L225 Difference]: With dead ends: 451 [2021-12-22 00:03:01,161 INFO L226 Difference]: Without dead ends: 451 [2021-12-22 00:03:01,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:01,168 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 131 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:01,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 762 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-22 00:03:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 351. [2021-12-22 00:03:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 269 states have (on average 1.8104089219330854) internal successors, (487), 338 states have internal predecessors, (487), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 507 transitions. [2021-12-22 00:03:01,181 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 507 transitions. Word has length 10 [2021-12-22 00:03:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:01,181 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 507 transitions. [2021-12-22 00:03:01,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 507 transitions. [2021-12-22 00:03:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 00:03:01,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:01,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:01,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 00:03:01,183 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash 268436822, now seen corresponding path program 1 times [2021-12-22 00:03:01,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:01,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851636044] [2021-12-22 00:03:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:01,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:01,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851636044] [2021-12-22 00:03:01,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851636044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:03:01,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47687990] [2021-12-22 00:03:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:03:01,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:03:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:03:01,214 INFO L87 Difference]: Start difference. First operand 351 states and 507 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:01,292 INFO L93 Difference]: Finished difference Result 406 states and 560 transitions. [2021-12-22 00:03:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:03:01,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-22 00:03:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:01,295 INFO L225 Difference]: With dead ends: 406 [2021-12-22 00:03:01,295 INFO L226 Difference]: Without dead ends: 399 [2021-12-22 00:03:01,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:03:01,296 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 70 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:01,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 287 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-22 00:03:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 348. [2021-12-22 00:03:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 266 states have (on average 1.8120300751879699) internal successors, (482), 335 states have internal predecessors, (482), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 502 transitions. [2021-12-22 00:03:01,305 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 502 transitions. Word has length 11 [2021-12-22 00:03:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:01,306 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 502 transitions. [2021-12-22 00:03:01,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:03:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 502 transitions. [2021-12-22 00:03:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 00:03:01,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:01,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:01,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 00:03:01,307 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1044692257, now seen corresponding path program 1 times [2021-12-22 00:03:01,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:01,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046434198] [2021-12-22 00:03:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:01,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:01,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046434198] [2021-12-22 00:03:01,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046434198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:01,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330272611] [2021-12-22 00:03:01,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:01,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:01,351 INFO L87 Difference]: Start difference. First operand 348 states and 502 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:01,601 INFO L93 Difference]: Finished difference Result 570 states and 734 transitions. [2021-12-22 00:03:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:01,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 00:03:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:01,605 INFO L225 Difference]: With dead ends: 570 [2021-12-22 00:03:01,605 INFO L226 Difference]: Without dead ends: 570 [2021-12-22 00:03:01,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:01,606 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 329 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:01,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 434 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-22 00:03:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 354. [2021-12-22 00:03:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 272 states have (on average 1.7941176470588236) internal successors, (488), 341 states have internal predecessors, (488), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 508 transitions. [2021-12-22 00:03:01,617 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 508 transitions. Word has length 15 [2021-12-22 00:03:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:01,618 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 508 transitions. [2021-12-22 00:03:01,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 508 transitions. [2021-12-22 00:03:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 00:03:01,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:01,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:01,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 00:03:01,622 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1044692256, now seen corresponding path program 1 times [2021-12-22 00:03:01,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:01,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781032990] [2021-12-22 00:03:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:01,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:01,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781032990] [2021-12-22 00:03:01,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781032990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:01,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587686819] [2021-12-22 00:03:01,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:01,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:01,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:01,685 INFO L87 Difference]: Start difference. First operand 354 states and 508 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:01,841 INFO L93 Difference]: Finished difference Result 408 states and 530 transitions. [2021-12-22 00:03:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 00:03:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:01,844 INFO L225 Difference]: With dead ends: 408 [2021-12-22 00:03:01,844 INFO L226 Difference]: Without dead ends: 408 [2021-12-22 00:03:01,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:01,845 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 197 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:01,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 445 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-22 00:03:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 354. [2021-12-22 00:03:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 272 states have (on average 1.7610294117647058) internal successors, (479), 341 states have internal predecessors, (479), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 499 transitions. [2021-12-22 00:03:01,856 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 499 transitions. Word has length 15 [2021-12-22 00:03:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:01,856 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 499 transitions. [2021-12-22 00:03:01,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 499 transitions. [2021-12-22 00:03:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:03:01,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:01,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:01,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 00:03:01,858 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:01,858 INFO L85 PathProgramCache]: Analyzing trace with hash 742849514, now seen corresponding path program 1 times [2021-12-22 00:03:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:01,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388852869] [2021-12-22 00:03:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:01,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:01,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388852869] [2021-12-22 00:03:01,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388852869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:01,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896382344] [2021-12-22 00:03:01,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:01,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:01,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:01,935 INFO L87 Difference]: Start difference. First operand 354 states and 499 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:02,264 INFO L93 Difference]: Finished difference Result 707 states and 854 transitions. [2021-12-22 00:03:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-22 00:03:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:02,267 INFO L225 Difference]: With dead ends: 707 [2021-12-22 00:03:02,267 INFO L226 Difference]: Without dead ends: 707 [2021-12-22 00:03:02,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:02,268 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 867 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:02,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 521 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-12-22 00:03:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 351. [2021-12-22 00:03:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 273 states have (on average 1.7326007326007327) internal successors, (473), 338 states have internal predecessors, (473), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 493 transitions. [2021-12-22 00:03:02,279 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 493 transitions. Word has length 17 [2021-12-22 00:03:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:02,279 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 493 transitions. [2021-12-22 00:03:02,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 493 transitions. [2021-12-22 00:03:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:03:02,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:02,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:02,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 00:03:02,281 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:02,281 INFO L85 PathProgramCache]: Analyzing trace with hash 742849515, now seen corresponding path program 1 times [2021-12-22 00:03:02,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:02,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915289677] [2021-12-22 00:03:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:02,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:02,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915289677] [2021-12-22 00:03:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915289677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:02,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:02,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734352710] [2021-12-22 00:03:02,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:02,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:02,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:02,399 INFO L87 Difference]: Start difference. First operand 351 states and 493 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,015 INFO L93 Difference]: Finished difference Result 766 states and 951 transitions. [2021-12-22 00:03:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:03,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-22 00:03:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,019 INFO L225 Difference]: With dead ends: 766 [2021-12-22 00:03:03,019 INFO L226 Difference]: Without dead ends: 766 [2021-12-22 00:03:03,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:03,020 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 895 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 703 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-22 00:03:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 384. [2021-12-22 00:03:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 304 states have (on average 1.7203947368421053) internal successors, (523), 370 states have internal predecessors, (523), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-22 00:03:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 547 transitions. [2021-12-22 00:03:03,035 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 547 transitions. Word has length 17 [2021-12-22 00:03:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,036 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 547 transitions. [2021-12-22 00:03:03,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 547 transitions. [2021-12-22 00:03:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:03:03,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:03,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 00:03:03,037 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1064604948, now seen corresponding path program 1 times [2021-12-22 00:03:03,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276556918] [2021-12-22 00:03:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:03,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:03,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276556918] [2021-12-22 00:03:03,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276556918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:03,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:03,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:03,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273123370] [2021-12-22 00:03:03,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:03,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:03,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:03,099 INFO L87 Difference]: Start difference. First operand 384 states and 547 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,139 INFO L93 Difference]: Finished difference Result 614 states and 849 transitions. [2021-12-22 00:03:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-22 00:03:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,142 INFO L225 Difference]: With dead ends: 614 [2021-12-22 00:03:03,142 INFO L226 Difference]: Without dead ends: 614 [2021-12-22 00:03:03,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:03,143 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 243 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1549 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-22 00:03:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 394. [2021-12-22 00:03:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 311 states have (on average 1.7009646302250805) internal successors, (529), 379 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 559 transitions. [2021-12-22 00:03:03,155 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 559 transitions. Word has length 17 [2021-12-22 00:03:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,155 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 559 transitions. [2021-12-22 00:03:03,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 559 transitions. [2021-12-22 00:03:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 00:03:03,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:03,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 00:03:03,157 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1357040557, now seen corresponding path program 1 times [2021-12-22 00:03:03,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265837723] [2021-12-22 00:03:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:03,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:03,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265837723] [2021-12-22 00:03:03,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265837723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:03,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:03,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:03,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005048122] [2021-12-22 00:03:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:03,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:03,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:03,251 INFO L87 Difference]: Start difference. First operand 394 states and 559 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,871 INFO L93 Difference]: Finished difference Result 793 states and 993 transitions. [2021-12-22 00:03:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-22 00:03:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,875 INFO L225 Difference]: With dead ends: 793 [2021-12-22 00:03:03,875 INFO L226 Difference]: Without dead ends: 793 [2021-12-22 00:03:03,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:03,876 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 545 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 841 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-12-22 00:03:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 391. [2021-12-22 00:03:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 308 states have (on average 1.7012987012987013) internal successors, (524), 376 states have internal predecessors, (524), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 554 transitions. [2021-12-22 00:03:03,888 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 554 transitions. Word has length 18 [2021-12-22 00:03:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,889 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 554 transitions. [2021-12-22 00:03:03,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 554 transitions. [2021-12-22 00:03:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 00:03:03,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,890 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] [2021-12-22 00:03:03,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 00:03:03,890 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1279047357, now seen corresponding path program 1 times [2021-12-22 00:03:03,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941724088] [2021-12-22 00:03:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:04,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:04,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941724088] [2021-12-22 00:03:04,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941724088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:04,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:04,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:03:04,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108438116] [2021-12-22 00:03:04,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:04,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:03:04,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:03:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:04,147 INFO L87 Difference]: Start difference. First operand 391 states and 554 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:04,799 INFO L93 Difference]: Finished difference Result 744 states and 1021 transitions. [2021-12-22 00:03:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:03:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-22 00:03:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:04,809 INFO L225 Difference]: With dead ends: 744 [2021-12-22 00:03:04,810 INFO L226 Difference]: Without dead ends: 742 [2021-12-22 00:03:04,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:03:04,811 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 523 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:04,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1862 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-12-22 00:03:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 385. [2021-12-22 00:03:04,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 302 states have (on average 1.6986754966887416) internal successors, (513), 370 states have internal predecessors, (513), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 543 transitions. [2021-12-22 00:03:04,822 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 543 transitions. Word has length 21 [2021-12-22 00:03:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:04,822 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 543 transitions. [2021-12-22 00:03:04,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 543 transitions. [2021-12-22 00:03:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 00:03:04,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:04,824 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] [2021-12-22 00:03:04,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 00:03:04,824 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2000662896, now seen corresponding path program 1 times [2021-12-22 00:03:04,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269975162] [2021-12-22 00:03:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:04,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:04,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269975162] [2021-12-22 00:03:04,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269975162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:04,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:04,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:03:04,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530994342] [2021-12-22 00:03:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:04,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:03:04,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:03:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:04,994 INFO L87 Difference]: Start difference. First operand 385 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:05,319 INFO L93 Difference]: Finished difference Result 548 states and 728 transitions. [2021-12-22 00:03:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-22 00:03:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:05,322 INFO L225 Difference]: With dead ends: 548 [2021-12-22 00:03:05,322 INFO L226 Difference]: Without dead ends: 548 [2021-12-22 00:03:05,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:05,322 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 217 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:05,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 951 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-22 00:03:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 401. [2021-12-22 00:03:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 318 states have (on average 1.6761006289308176) internal successors, (533), 384 states have internal predecessors, (533), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 563 transitions. [2021-12-22 00:03:05,332 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 563 transitions. Word has length 21 [2021-12-22 00:03:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:05,332 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 563 transitions. [2021-12-22 00:03:05,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 563 transitions. [2021-12-22 00:03:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 00:03:05,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:05,333 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] [2021-12-22 00:03:05,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 00:03:05,334 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1680606867, now seen corresponding path program 1 times [2021-12-22 00:03:05,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:05,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307883926] [2021-12-22 00:03:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:05,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:05,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307883926] [2021-12-22 00:03:05,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307883926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:05,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:05,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:05,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508285249] [2021-12-22 00:03:05,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:05,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:05,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:05,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:05,418 INFO L87 Difference]: Start difference. First operand 401 states and 563 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:05,452 INFO L93 Difference]: Finished difference Result 646 states and 894 transitions. [2021-12-22 00:03:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:05,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-22 00:03:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:05,455 INFO L225 Difference]: With dead ends: 646 [2021-12-22 00:03:05,455 INFO L226 Difference]: Without dead ends: 646 [2021-12-22 00:03:05,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:05,456 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 245 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:05,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1239 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-12-22 00:03:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 403. [2021-12-22 00:03:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 320 states have (on average 1.671875) internal successors, (535), 386 states have internal predecessors, (535), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 565 transitions. [2021-12-22 00:03:05,465 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 565 transitions. Word has length 22 [2021-12-22 00:03:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:05,466 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 565 transitions. [2021-12-22 00:03:05,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 565 transitions. [2021-12-22 00:03:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 00:03:05,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:05,467 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] [2021-12-22 00:03:05,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 00:03:05,467 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash -839353067, now seen corresponding path program 1 times [2021-12-22 00:03:05,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:05,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950803368] [2021-12-22 00:03:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:05,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:05,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950803368] [2021-12-22 00:03:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950803368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:05,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:05,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:05,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238966135] [2021-12-22 00:03:05,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:05,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:05,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:05,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:05,523 INFO L87 Difference]: Start difference. First operand 403 states and 565 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:05,556 INFO L93 Difference]: Finished difference Result 642 states and 886 transitions. [2021-12-22 00:03:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-22 00:03:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:05,559 INFO L225 Difference]: With dead ends: 642 [2021-12-22 00:03:05,559 INFO L226 Difference]: Without dead ends: 642 [2021-12-22 00:03:05,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:05,560 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 242 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:05,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 1255 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-12-22 00:03:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 401. [2021-12-22 00:03:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 318 states have (on average 1.6635220125786163) internal successors, (529), 384 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 559 transitions. [2021-12-22 00:03:05,570 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 559 transitions. Word has length 22 [2021-12-22 00:03:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:05,570 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 559 transitions. [2021-12-22 00:03:05,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 559 transitions. [2021-12-22 00:03:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 00:03:05,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:05,571 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] [2021-12-22 00:03:05,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 00:03:05,572 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1175048242, now seen corresponding path program 1 times [2021-12-22 00:03:05,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:05,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495669548] [2021-12-22 00:03:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:05,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:05,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:05,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495669548] [2021-12-22 00:03:05,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495669548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:05,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:05,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:03:05,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840711066] [2021-12-22 00:03:05,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:05,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:03:05,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:05,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:03:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:05,674 INFO L87 Difference]: Start difference. First operand 401 states and 559 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:05,953 INFO L93 Difference]: Finished difference Result 578 states and 779 transitions. [2021-12-22 00:03:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 00:03:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-22 00:03:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:05,955 INFO L225 Difference]: With dead ends: 578 [2021-12-22 00:03:05,956 INFO L226 Difference]: Without dead ends: 578 [2021-12-22 00:03:05,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:03:05,956 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 191 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:05,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1270 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-22 00:03:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 411. [2021-12-22 00:03:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 328 states have (on average 1.649390243902439) internal successors, (541), 392 states have internal predecessors, (541), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 571 transitions. [2021-12-22 00:03:05,966 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 571 transitions. Word has length 22 [2021-12-22 00:03:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 571 transitions. [2021-12-22 00:03:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 571 transitions. [2021-12-22 00:03:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 00:03:05,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:05,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:05,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 00:03:05,968 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash -796222002, now seen corresponding path program 1 times [2021-12-22 00:03:05,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:05,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699792972] [2021-12-22 00:03:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:05,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:06,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699792972] [2021-12-22 00:03:06,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699792972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:06,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552934581] [2021-12-22 00:03:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:06,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:06,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:06,014 INFO L87 Difference]: Start difference. First operand 411 states and 571 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,206 INFO L93 Difference]: Finished difference Result 654 states and 844 transitions. [2021-12-22 00:03:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:06,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-22 00:03:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,208 INFO L225 Difference]: With dead ends: 654 [2021-12-22 00:03:06,209 INFO L226 Difference]: Without dead ends: 654 [2021-12-22 00:03:06,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:06,209 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 303 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 442 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-12-22 00:03:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 439. [2021-12-22 00:03:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 356 states have (on average 1.6657303370786516) internal successors, (593), 420 states have internal predecessors, (593), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 623 transitions. [2021-12-22 00:03:06,219 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 623 transitions. Word has length 23 [2021-12-22 00:03:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,219 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 623 transitions. [2021-12-22 00:03:06,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 623 transitions. [2021-12-22 00:03:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 00:03:06,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,220 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] [2021-12-22 00:03:06,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 00:03:06,221 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -796222001, now seen corresponding path program 1 times [2021-12-22 00:03:06,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812663845] [2021-12-22 00:03:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:06,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812663845] [2021-12-22 00:03:06,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812663845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:06,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756618928] [2021-12-22 00:03:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:06,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:06,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:06,322 INFO L87 Difference]: Start difference. First operand 439 states and 623 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,540 INFO L93 Difference]: Finished difference Result 491 states and 648 transitions. [2021-12-22 00:03:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-22 00:03:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,542 INFO L225 Difference]: With dead ends: 491 [2021-12-22 00:03:06,542 INFO L226 Difference]: Without dead ends: 491 [2021-12-22 00:03:06,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:06,543 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 366 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 543 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:06,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-22 00:03:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 439. [2021-12-22 00:03:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 356 states have (on average 1.6404494382022472) internal successors, (584), 420 states have internal predecessors, (584), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 614 transitions. [2021-12-22 00:03:06,553 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 614 transitions. Word has length 23 [2021-12-22 00:03:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,553 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 614 transitions. [2021-12-22 00:03:06,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 614 transitions. [2021-12-22 00:03:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 00:03:06,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,554 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] [2021-12-22 00:03:06,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 00:03:06,554 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1911985061, now seen corresponding path program 1 times [2021-12-22 00:03:06,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036341613] [2021-12-22 00:03:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:06,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036341613] [2021-12-22 00:03:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036341613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:06,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970805820] [2021-12-22 00:03:06,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:06,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:06,581 INFO L87 Difference]: Start difference. First operand 439 states and 614 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,598 INFO L93 Difference]: Finished difference Result 451 states and 626 transitions. [2021-12-22 00:03:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:03:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 00:03:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,601 INFO L225 Difference]: With dead ends: 451 [2021-12-22 00:03:06,601 INFO L226 Difference]: Without dead ends: 451 [2021-12-22 00:03:06,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:06,602 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 3 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 541 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-22 00:03:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 448. [2021-12-22 00:03:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 365 states have (on average 1.6246575342465754) internal successors, (593), 429 states have internal predecessors, (593), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 623 transitions. [2021-12-22 00:03:06,610 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 623 transitions. Word has length 25 [2021-12-22 00:03:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,611 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 623 transitions. [2021-12-22 00:03:06,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 623 transitions. [2021-12-22 00:03:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 00:03:06,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,612 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] [2021-12-22 00:03:06,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 00:03:06,612 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1913832103, now seen corresponding path program 1 times [2021-12-22 00:03:06,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244932903] [2021-12-22 00:03:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:06,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244932903] [2021-12-22 00:03:06,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244932903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:06,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170116515] [2021-12-22 00:03:06,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:06,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:06,655 INFO L87 Difference]: Start difference. First operand 448 states and 623 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,816 INFO L93 Difference]: Finished difference Result 756 states and 1001 transitions. [2021-12-22 00:03:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:06,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 00:03:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,820 INFO L225 Difference]: With dead ends: 756 [2021-12-22 00:03:06,820 INFO L226 Difference]: Without dead ends: 756 [2021-12-22 00:03:06,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:06,821 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 339 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 477 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-12-22 00:03:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 507. [2021-12-22 00:03:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 425 states have (on average 1.6) internal successors, (680), 488 states have internal predecessors, (680), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 710 transitions. [2021-12-22 00:03:06,849 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 710 transitions. Word has length 25 [2021-12-22 00:03:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,849 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 710 transitions. [2021-12-22 00:03:06,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 710 transitions. [2021-12-22 00:03:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 00:03:06,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,850 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] [2021-12-22 00:03:06,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 00:03:06,850 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1913832102, now seen corresponding path program 1 times [2021-12-22 00:03:06,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32325863] [2021-12-22 00:03:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:06,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32325863] [2021-12-22 00:03:06,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32325863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:03:06,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375571865] [2021-12-22 00:03:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:03:06,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:03:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:03:06,874 INFO L87 Difference]: Start difference. First operand 507 states and 710 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,960 INFO L93 Difference]: Finished difference Result 594 states and 801 transitions. [2021-12-22 00:03:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:03:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 00:03:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,963 INFO L225 Difference]: With dead ends: 594 [2021-12-22 00:03:06,963 INFO L226 Difference]: Without dead ends: 594 [2021-12-22 00:03:06,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:03:06,964 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 148 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 272 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-22 00:03:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 504. [2021-12-22 00:03:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 425 states have (on average 1.571764705882353) internal successors, (668), 485 states have internal predecessors, (668), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 698 transitions. [2021-12-22 00:03:06,974 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 698 transitions. Word has length 25 [2021-12-22 00:03:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,975 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 698 transitions. [2021-12-22 00:03:06,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 698 transitions. [2021-12-22 00:03:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 00:03:06,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:06,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 00:03:06,976 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2102112361, now seen corresponding path program 1 times [2021-12-22 00:03:06,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128783485] [2021-12-22 00:03:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:07,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128783485] [2021-12-22 00:03:07,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128783485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:07,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085174960] [2021-12-22 00:03:07,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:07,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:07,021 INFO L87 Difference]: Start difference. First operand 504 states and 698 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,182 INFO L93 Difference]: Finished difference Result 810 states and 1070 transitions. [2021-12-22 00:03:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-22 00:03:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,186 INFO L225 Difference]: With dead ends: 810 [2021-12-22 00:03:07,186 INFO L226 Difference]: Without dead ends: 810 [2021-12-22 00:03:07,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:07,186 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 326 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 515 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-12-22 00:03:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 504. [2021-12-22 00:03:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 425 states have (on average 1.571764705882353) internal successors, (668), 485 states have internal predecessors, (668), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 698 transitions. [2021-12-22 00:03:07,198 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 698 transitions. Word has length 26 [2021-12-22 00:03:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,198 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 698 transitions. [2021-12-22 00:03:07,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 698 transitions. [2021-12-22 00:03:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 00:03:07,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:07,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 00:03:07,199 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1491790357, now seen corresponding path program 1 times [2021-12-22 00:03:07,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738564075] [2021-12-22 00:03:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:07,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738564075] [2021-12-22 00:03:07,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738564075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:07,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664170784] [2021-12-22 00:03:07,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:07,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:07,266 INFO L87 Difference]: Start difference. First operand 504 states and 698 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,305 INFO L93 Difference]: Finished difference Result 708 states and 959 transitions. [2021-12-22 00:03:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-22 00:03:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,308 INFO L225 Difference]: With dead ends: 708 [2021-12-22 00:03:07,308 INFO L226 Difference]: Without dead ends: 708 [2021-12-22 00:03:07,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:07,309 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 233 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1515 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-12-22 00:03:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 443. [2021-12-22 00:03:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 365 states have (on average 1.5726027397260274) internal successors, (574), 424 states have internal predecessors, (574), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 604 transitions. [2021-12-22 00:03:07,319 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 604 transitions. Word has length 26 [2021-12-22 00:03:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 604 transitions. [2021-12-22 00:03:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 604 transitions. [2021-12-22 00:03:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:03:07,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,320 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] [2021-12-22 00:03:07,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 00:03:07,320 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash 731575509, now seen corresponding path program 1 times [2021-12-22 00:03:07,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193719659] [2021-12-22 00:03:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:07,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193719659] [2021-12-22 00:03:07,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193719659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:07,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124233831] [2021-12-22 00:03:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:07,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:07,377 INFO L87 Difference]: Start difference. First operand 443 states and 604 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,510 INFO L93 Difference]: Finished difference Result 517 states and 672 transitions. [2021-12-22 00:03:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-22 00:03:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,514 INFO L225 Difference]: With dead ends: 517 [2021-12-22 00:03:07,514 INFO L226 Difference]: Without dead ends: 517 [2021-12-22 00:03:07,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:07,515 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 167 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 660 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-22 00:03:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 443. [2021-12-22 00:03:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 365 states have (on average 1.5698630136986302) internal successors, (573), 424 states have internal predecessors, (573), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 603 transitions. [2021-12-22 00:03:07,524 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 603 transitions. Word has length 27 [2021-12-22 00:03:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,524 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 603 transitions. [2021-12-22 00:03:07,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 603 transitions. [2021-12-22 00:03:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:03:07,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,525 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] [2021-12-22 00:03:07,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 00:03:07,526 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,526 INFO L85 PathProgramCache]: Analyzing trace with hash 946649543, now seen corresponding path program 1 times [2021-12-22 00:03:07,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649480363] [2021-12-22 00:03:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:07,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649480363] [2021-12-22 00:03:07,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649480363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:03:07,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235100710] [2021-12-22 00:03:07,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:07,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:07,594 INFO L87 Difference]: Start difference. First operand 443 states and 603 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,759 INFO L93 Difference]: Finished difference Result 645 states and 864 transitions. [2021-12-22 00:03:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-22 00:03:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,761 INFO L225 Difference]: With dead ends: 645 [2021-12-22 00:03:07,761 INFO L226 Difference]: Without dead ends: 645 [2021-12-22 00:03:07,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:07,762 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 158 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1264 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-22 00:03:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 473. [2021-12-22 00:03:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 395 states have (on average 1.539240506329114) internal successors, (608), 454 states have internal predecessors, (608), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 638 transitions. [2021-12-22 00:03:07,772 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 638 transitions. Word has length 27 [2021-12-22 00:03:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,772 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 638 transitions. [2021-12-22 00:03:07,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 638 transitions. [2021-12-22 00:03:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:03:07,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,773 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] [2021-12-22 00:03:07,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 00:03:07,774 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash 946649737, now seen corresponding path program 1 times [2021-12-22 00:03:07,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291222883] [2021-12-22 00:03:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:07,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291222883] [2021-12-22 00:03:07,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291222883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:07,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925521184] [2021-12-22 00:03:07,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:07,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:07,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:07,819 INFO L87 Difference]: Start difference. First operand 473 states and 638 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,977 INFO L93 Difference]: Finished difference Result 808 states and 1039 transitions. [2021-12-22 00:03:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:07,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-22 00:03:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,980 INFO L225 Difference]: With dead ends: 808 [2021-12-22 00:03:07,980 INFO L226 Difference]: Without dead ends: 808 [2021-12-22 00:03:07,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:07,981 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 330 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 524 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-12-22 00:03:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 563. [2021-12-22 00:03:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 485 states have (on average 1.5175257731958762) internal successors, (736), 544 states have internal predecessors, (736), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 766 transitions. [2021-12-22 00:03:07,992 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 766 transitions. Word has length 27 [2021-12-22 00:03:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,992 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 766 transitions. [2021-12-22 00:03:07,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 766 transitions. [2021-12-22 00:03:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 00:03:07,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,993 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] [2021-12-22 00:03:07,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 00:03:07,993 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1204004541, now seen corresponding path program 1 times [2021-12-22 00:03:07,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201262004] [2021-12-22 00:03:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:08,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201262004] [2021-12-22 00:03:08,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201262004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:08,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:08,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:08,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444639099] [2021-12-22 00:03:08,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:08,057 INFO L87 Difference]: Start difference. First operand 563 states and 766 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:08,223 INFO L93 Difference]: Finished difference Result 758 states and 993 transitions. [2021-12-22 00:03:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:03:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-22 00:03:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:08,227 INFO L225 Difference]: With dead ends: 758 [2021-12-22 00:03:08,227 INFO L226 Difference]: Without dead ends: 758 [2021-12-22 00:03:08,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:08,228 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 218 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:08,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 665 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-12-22 00:03:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 601. [2021-12-22 00:03:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 519 states have (on average 1.5144508670520231) internal successors, (786), 580 states have internal predecessors, (786), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 00:03:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 822 transitions. [2021-12-22 00:03:08,241 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 822 transitions. Word has length 28 [2021-12-22 00:03:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:08,242 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 822 transitions. [2021-12-22 00:03:08,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 822 transitions. [2021-12-22 00:03:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 00:03:08,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:08,243 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] [2021-12-22 00:03:08,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 00:03:08,243 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1495351243, now seen corresponding path program 1 times [2021-12-22 00:03:08,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:08,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611498636] [2021-12-22 00:03:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:08,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:08,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:08,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611498636] [2021-12-22 00:03:08,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611498636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:08,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:08,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:08,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534861173] [2021-12-22 00:03:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:08,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:08,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:08,288 INFO L87 Difference]: Start difference. First operand 601 states and 822 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:08,452 INFO L93 Difference]: Finished difference Result 845 states and 1089 transitions. [2021-12-22 00:03:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-22 00:03:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:08,456 INFO L225 Difference]: With dead ends: 845 [2021-12-22 00:03:08,456 INFO L226 Difference]: Without dead ends: 845 [2021-12-22 00:03:08,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:08,457 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 317 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:08,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 537 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-22 00:03:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 510. [2021-12-22 00:03:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 429 states have (on average 1.5198135198135199) internal successors, (652), 489 states have internal predecessors, (652), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 00:03:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 688 transitions. [2021-12-22 00:03:08,469 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 688 transitions. Word has length 28 [2021-12-22 00:03:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 688 transitions. [2021-12-22 00:03:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 688 transitions. [2021-12-22 00:03:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:08,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:08,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:08,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 00:03:08,471 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:08,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1910467130, now seen corresponding path program 1 times [2021-12-22 00:03:08,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598604853] [2021-12-22 00:03:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:08,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:08,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:08,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598604853] [2021-12-22 00:03:08,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598604853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:08,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:08,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:08,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499351544] [2021-12-22 00:03:08,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:08,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:08,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:08,549 INFO L87 Difference]: Start difference. First operand 510 states and 688 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:08,817 INFO L93 Difference]: Finished difference Result 1252 states and 1682 transitions. [2021-12-22 00:03:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:08,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 00:03:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:08,822 INFO L225 Difference]: With dead ends: 1252 [2021-12-22 00:03:08,822 INFO L226 Difference]: Without dead ends: 1252 [2021-12-22 00:03:08,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:08,823 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 540 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:08,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1630 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-12-22 00:03:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 644. [2021-12-22 00:03:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 563 states have (on average 1.5204262877442274) internal successors, (856), 617 states have internal predecessors, (856), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 00:03:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 892 transitions. [2021-12-22 00:03:08,839 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 892 transitions. Word has length 30 [2021-12-22 00:03:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:08,839 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 892 transitions. [2021-12-22 00:03:08,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 892 transitions. [2021-12-22 00:03:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:08,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:08,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:08,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 00:03:08,840 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1702169087, now seen corresponding path program 1 times [2021-12-22 00:03:08,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:08,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575371913] [2021-12-22 00:03:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:08,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:08,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575371913] [2021-12-22 00:03:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575371913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:08,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:08,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:08,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061288493] [2021-12-22 00:03:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:08,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:08,953 INFO L87 Difference]: Start difference. First operand 644 states and 892 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:09,424 INFO L93 Difference]: Finished difference Result 1137 states and 1525 transitions. [2021-12-22 00:03:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 00:03:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:09,428 INFO L225 Difference]: With dead ends: 1137 [2021-12-22 00:03:09,428 INFO L226 Difference]: Without dead ends: 1137 [2021-12-22 00:03:09,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:09,429 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 470 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:09,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1053 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-12-22 00:03:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 687. [2021-12-22 00:03:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 602 states have (on average 1.5016611295681064) internal successors, (904), 657 states have internal predecessors, (904), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 946 transitions. [2021-12-22 00:03:09,442 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 946 transitions. Word has length 30 [2021-12-22 00:03:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:09,443 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 946 transitions. [2021-12-22 00:03:09,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 946 transitions. [2021-12-22 00:03:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:09,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:09,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 00:03:09,444 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1975675941, now seen corresponding path program 1 times [2021-12-22 00:03:09,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:09,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003445146] [2021-12-22 00:03:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:09,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:09,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003445146] [2021-12-22 00:03:09,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003445146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:09,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:09,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:09,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772500511] [2021-12-22 00:03:09,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:09,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:09,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:09,496 INFO L87 Difference]: Start difference. First operand 687 states and 946 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:09,523 INFO L93 Difference]: Finished difference Result 1055 states and 1417 transitions. [2021-12-22 00:03:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:09,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 00:03:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:09,527 INFO L225 Difference]: With dead ends: 1055 [2021-12-22 00:03:09,528 INFO L226 Difference]: Without dead ends: 1055 [2021-12-22 00:03:09,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:09,528 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 226 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:09,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1134 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-12-22 00:03:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 679. [2021-12-22 00:03:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 594 states have (on average 1.5016835016835017) internal successors, (892), 649 states have internal predecessors, (892), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 934 transitions. [2021-12-22 00:03:09,546 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 934 transitions. Word has length 30 [2021-12-22 00:03:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:09,546 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 934 transitions. [2021-12-22 00:03:09,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 934 transitions. [2021-12-22 00:03:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:09,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:09,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:09,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 00:03:09,547 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1977522983, now seen corresponding path program 1 times [2021-12-22 00:03:09,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810103383] [2021-12-22 00:03:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:09,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:09,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:09,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810103383] [2021-12-22 00:03:09,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810103383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:09,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:09,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:09,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682087503] [2021-12-22 00:03:09,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:09,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:09,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:09,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:09,640 INFO L87 Difference]: Start difference. First operand 679 states and 934 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:09,891 INFO L93 Difference]: Finished difference Result 1259 states and 1668 transitions. [2021-12-22 00:03:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 00:03:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:09,896 INFO L225 Difference]: With dead ends: 1259 [2021-12-22 00:03:09,896 INFO L226 Difference]: Without dead ends: 1259 [2021-12-22 00:03:09,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:09,897 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 502 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:09,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1806 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-12-22 00:03:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 646. [2021-12-22 00:03:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 564 states have (on average 1.4663120567375887) internal successors, (827), 616 states have internal predecessors, (827), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 869 transitions. [2021-12-22 00:03:09,916 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 869 transitions. Word has length 30 [2021-12-22 00:03:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:09,917 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 869 transitions. [2021-12-22 00:03:09,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 869 transitions. [2021-12-22 00:03:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 00:03:09,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:09,917 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] [2021-12-22 00:03:09,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 00:03:09,918 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:09,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1227634393, now seen corresponding path program 1 times [2021-12-22 00:03:09,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:09,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368050855] [2021-12-22 00:03:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:09,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:10,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368050855] [2021-12-22 00:03:10,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368050855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:10,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:10,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:10,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722205451] [2021-12-22 00:03:10,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:10,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:10,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:10,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:10,035 INFO L87 Difference]: Start difference. First operand 646 states and 869 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:10,399 INFO L93 Difference]: Finished difference Result 925 states and 1194 transitions. [2021-12-22 00:03:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-12-22 00:03:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:10,403 INFO L225 Difference]: With dead ends: 925 [2021-12-22 00:03:10,403 INFO L226 Difference]: Without dead ends: 925 [2021-12-22 00:03:10,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:10,404 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 479 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:10,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 816 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-12-22 00:03:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 646. [2021-12-22 00:03:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 564 states have (on average 1.4592198581560283) internal successors, (823), 616 states have internal predecessors, (823), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 865 transitions. [2021-12-22 00:03:10,417 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 865 transitions. Word has length 31 [2021-12-22 00:03:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:10,417 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 865 transitions. [2021-12-22 00:03:10,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 865 transitions. [2021-12-22 00:03:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 00:03:10,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:10,418 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] [2021-12-22 00:03:10,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-22 00:03:10,418 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:10,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2007870586, now seen corresponding path program 1 times [2021-12-22 00:03:10,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:10,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226577892] [2021-12-22 00:03:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:10,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:10,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:10,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226577892] [2021-12-22 00:03:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226577892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:10,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:10,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:10,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738232176] [2021-12-22 00:03:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:10,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:10,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:10,557 INFO L87 Difference]: Start difference. First operand 646 states and 865 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:10,738 INFO L93 Difference]: Finished difference Result 695 states and 913 transitions. [2021-12-22 00:03:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-22 00:03:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:10,740 INFO L225 Difference]: With dead ends: 695 [2021-12-22 00:03:10,740 INFO L226 Difference]: Without dead ends: 695 [2021-12-22 00:03:10,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:10,741 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 110 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:10,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 835 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-12-22 00:03:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 625. [2021-12-22 00:03:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 543 states have (on average 1.4659300184162063) internal successors, (796), 597 states have internal predecessors, (796), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 838 transitions. [2021-12-22 00:03:10,752 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 838 transitions. Word has length 32 [2021-12-22 00:03:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:10,752 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 838 transitions. [2021-12-22 00:03:10,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 838 transitions. [2021-12-22 00:03:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 00:03:10,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:10,753 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] [2021-12-22 00:03:10,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-22 00:03:10,754 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1362637237, now seen corresponding path program 1 times [2021-12-22 00:03:10,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:10,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808913886] [2021-12-22 00:03:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:10,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:10,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:10,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:10,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808913886] [2021-12-22 00:03:10,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808913886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:10,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:10,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:10,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272501942] [2021-12-22 00:03:10,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:10,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:10,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:10,794 INFO L87 Difference]: Start difference. First operand 625 states and 838 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:10,961 INFO L93 Difference]: Finished difference Result 729 states and 966 transitions. [2021-12-22 00:03:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:10,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 00:03:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:10,964 INFO L225 Difference]: With dead ends: 729 [2021-12-22 00:03:10,964 INFO L226 Difference]: Without dead ends: 729 [2021-12-22 00:03:10,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:10,965 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 468 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:10,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 565 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-12-22 00:03:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 624. [2021-12-22 00:03:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 543 states have (on average 1.4622467771639043) internal successors, (794), 596 states have internal predecessors, (794), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 836 transitions. [2021-12-22 00:03:10,976 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 836 transitions. Word has length 35 [2021-12-22 00:03:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:10,976 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 836 transitions. [2021-12-22 00:03:10,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 836 transitions. [2021-12-22 00:03:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 00:03:10,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:10,977 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] [2021-12-22 00:03:10,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-22 00:03:10,978 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1362637238, now seen corresponding path program 1 times [2021-12-22 00:03:10,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:10,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996587264] [2021-12-22 00:03:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:10,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:11,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:11,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996587264] [2021-12-22 00:03:11,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996587264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:11,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:11,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:11,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419453690] [2021-12-22 00:03:11,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:11,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:11,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:11,046 INFO L87 Difference]: Start difference. First operand 624 states and 836 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:11,197 INFO L93 Difference]: Finished difference Result 661 states and 851 transitions. [2021-12-22 00:03:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 00:03:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:11,199 INFO L225 Difference]: With dead ends: 661 [2021-12-22 00:03:11,199 INFO L226 Difference]: Without dead ends: 661 [2021-12-22 00:03:11,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:11,200 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 496 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:11,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 618 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-12-22 00:03:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 623. [2021-12-22 00:03:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 543 states have (on average 1.4585635359116023) internal successors, (792), 595 states have internal predecessors, (792), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 834 transitions. [2021-12-22 00:03:11,210 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 834 transitions. Word has length 35 [2021-12-22 00:03:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:11,210 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 834 transitions. [2021-12-22 00:03:11,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 834 transitions. [2021-12-22 00:03:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 00:03:11,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:11,211 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] [2021-12-22 00:03:11,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-22 00:03:11,212 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash -470637162, now seen corresponding path program 1 times [2021-12-22 00:03:11,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:11,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55995359] [2021-12-22 00:03:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:11,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:11,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:11,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55995359] [2021-12-22 00:03:11,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55995359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:11,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:11,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:11,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106693808] [2021-12-22 00:03:11,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:11,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:11,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:11,254 INFO L87 Difference]: Start difference. First operand 623 states and 834 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:11,431 INFO L93 Difference]: Finished difference Result 1070 states and 1398 transitions. [2021-12-22 00:03:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:03:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-22 00:03:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:11,434 INFO L225 Difference]: With dead ends: 1070 [2021-12-22 00:03:11,434 INFO L226 Difference]: Without dead ends: 1070 [2021-12-22 00:03:11,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:11,435 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 619 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:11,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 513 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-12-22 00:03:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 620. [2021-12-22 00:03:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 543 states have (on average 1.4475138121546962) internal successors, (786), 592 states have internal predecessors, (786), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 828 transitions. [2021-12-22 00:03:11,447 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 828 transitions. Word has length 37 [2021-12-22 00:03:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:11,447 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 828 transitions. [2021-12-22 00:03:11,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 828 transitions. [2021-12-22 00:03:11,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 00:03:11,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:11,448 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] [2021-12-22 00:03:11,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-22 00:03:11,448 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:11,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash -470637161, now seen corresponding path program 1 times [2021-12-22 00:03:11,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:11,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166966774] [2021-12-22 00:03:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:11,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:11,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166966774] [2021-12-22 00:03:11,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166966774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:11,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:11,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:11,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802614070] [2021-12-22 00:03:11,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:11,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:11,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:11,534 INFO L87 Difference]: Start difference. First operand 620 states and 828 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:11,739 INFO L93 Difference]: Finished difference Result 896 states and 1151 transitions. [2021-12-22 00:03:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-22 00:03:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:11,741 INFO L225 Difference]: With dead ends: 896 [2021-12-22 00:03:11,742 INFO L226 Difference]: Without dead ends: 896 [2021-12-22 00:03:11,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:11,742 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 715 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:11,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 641 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-12-22 00:03:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 619. [2021-12-22 00:03:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 543 states have (on average 1.4438305709023942) internal successors, (784), 591 states have internal predecessors, (784), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 826 transitions. [2021-12-22 00:03:11,753 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 826 transitions. Word has length 37 [2021-12-22 00:03:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:11,753 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 826 transitions. [2021-12-22 00:03:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 826 transitions. [2021-12-22 00:03:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 00:03:11,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:11,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:11,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-22 00:03:11,755 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:11,755 INFO L85 PathProgramCache]: Analyzing trace with hash -470637000, now seen corresponding path program 1 times [2021-12-22 00:03:11,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:11,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891624495] [2021-12-22 00:03:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:11,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:11,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:11,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891624495] [2021-12-22 00:03:11,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891624495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:11,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:11,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:11,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944869869] [2021-12-22 00:03:11,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:11,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:11,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:11,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:11,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:11,845 INFO L87 Difference]: Start difference. First operand 619 states and 826 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:12,086 INFO L93 Difference]: Finished difference Result 787 states and 995 transitions. [2021-12-22 00:03:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:03:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-22 00:03:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:12,104 INFO L225 Difference]: With dead ends: 787 [2021-12-22 00:03:12,104 INFO L226 Difference]: Without dead ends: 787 [2021-12-22 00:03:12,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:12,105 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 375 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:12,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 551 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-12-22 00:03:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 619. [2021-12-22 00:03:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 543 states have (on average 1.4401473296500922) internal successors, (782), 591 states have internal predecessors, (782), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 824 transitions. [2021-12-22 00:03:12,116 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 824 transitions. Word has length 37 [2021-12-22 00:03:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:12,116 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 824 transitions. [2021-12-22 00:03:12,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 824 transitions. [2021-12-22 00:03:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 00:03:12,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:12,117 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] [2021-12-22 00:03:12,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-22 00:03:12,118 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:12,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1641938402, now seen corresponding path program 1 times [2021-12-22 00:03:12,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:12,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848456581] [2021-12-22 00:03:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:12,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 00:03:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:03:12,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:12,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848456581] [2021-12-22 00:03:12,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848456581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:12,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459865107] [2021-12-22 00:03:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:12,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:12,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:12,171 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) [2021-12-22 00:03:12,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:03:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 00:03:12,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:12,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:12,608 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:03:12,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 00:03:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:03:12,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459865107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:03:12,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:03:12,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-22 00:03:12,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220774559] [2021-12-22 00:03:12,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:12,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:12,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:12,666 INFO L87 Difference]: Start difference. First operand 619 states and 824 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:03:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:13,332 INFO L93 Difference]: Finished difference Result 1838 states and 2259 transitions. [2021-12-22 00:03:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:03:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2021-12-22 00:03:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:13,336 INFO L225 Difference]: With dead ends: 1838 [2021-12-22 00:03:13,336 INFO L226 Difference]: Without dead ends: 1838 [2021-12-22 00:03:13,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:03:13,340 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2609 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2611 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:13,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2611 Valid, 1384 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-12-22 00:03:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 735. [2021-12-22 00:03:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 653 states have (on average 1.3705972434915774) internal successors, (895), 696 states have internal predecessors, (895), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 28 states have call predecessors, (40), 20 states have call successors, (40) [2021-12-22 00:03:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 955 transitions. [2021-12-22 00:03:13,382 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 955 transitions. Word has length 43 [2021-12-22 00:03:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:13,382 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 955 transitions. [2021-12-22 00:03:13,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:03:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 955 transitions. [2021-12-22 00:03:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:13,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:13,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:13,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:13,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:13,604 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:13,604 INFO L85 PathProgramCache]: Analyzing trace with hash -974885366, now seen corresponding path program 1 times [2021-12-22 00:03:13,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:13,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778358321] [2021-12-22 00:03:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:13,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:13,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:13,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778358321] [2021-12-22 00:03:13,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778358321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:13,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:13,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:13,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960791792] [2021-12-22 00:03:13,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:13,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:13,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:13,644 INFO L87 Difference]: Start difference. First operand 735 states and 955 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:13,659 INFO L93 Difference]: Finished difference Result 868 states and 1111 transitions. [2021-12-22 00:03:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 00:03:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:13,662 INFO L225 Difference]: With dead ends: 868 [2021-12-22 00:03:13,662 INFO L226 Difference]: Without dead ends: 868 [2021-12-22 00:03:13,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:13,667 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 152 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:13,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 582 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-12-22 00:03:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 691. [2021-12-22 00:03:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 613 states have (on average 1.3800978792822185) internal successors, (846), 656 states have internal predecessors, (846), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-22 00:03:13,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 900 transitions. [2021-12-22 00:03:13,681 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 900 transitions. Word has length 45 [2021-12-22 00:03:13,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:13,683 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 900 transitions. [2021-12-22 00:03:13,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 900 transitions. [2021-12-22 00:03:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:13,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:13,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:13,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-22 00:03:13,685 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1845991888, now seen corresponding path program 1 times [2021-12-22 00:03:13,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:13,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849121916] [2021-12-22 00:03:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:13,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:13,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:13,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849121916] [2021-12-22 00:03:13,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849121916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:13,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640203752] [2021-12-22 00:03:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:13,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:13,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:13,770 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) [2021-12-22 00:03:13,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 00:03:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 00:03:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:14,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:14,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-22 00:03:14,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:14,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-22 00:03:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:03:14,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:14,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640203752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:14,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:14,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-22 00:03:14,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33955317] [2021-12-22 00:03:14,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:14,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:03:14,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:14,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:03:14,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:14,109 INFO L87 Difference]: Start difference. First operand 691 states and 900 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:14,406 INFO L93 Difference]: Finished difference Result 605 states and 758 transitions. [2021-12-22 00:03:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:14,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 00:03:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:14,408 INFO L225 Difference]: With dead ends: 605 [2021-12-22 00:03:14,408 INFO L226 Difference]: Without dead ends: 605 [2021-12-22 00:03:14,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-22 00:03:14,409 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 286 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:14,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1441 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-22 00:03:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 438. [2021-12-22 00:03:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 380 states have (on average 1.4052631578947368) internal successors, (534), 418 states have internal predecessors, (534), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 00:03:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 558 transitions. [2021-12-22 00:03:14,416 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 558 transitions. Word has length 45 [2021-12-22 00:03:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:14,416 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 558 transitions. [2021-12-22 00:03:14,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 558 transitions. [2021-12-22 00:03:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 00:03:14,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:14,417 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:14,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:14,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-22 00:03:14,637 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash -102248492, now seen corresponding path program 1 times [2021-12-22 00:03:14,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:14,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069164843] [2021-12-22 00:03:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:14,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:14,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:14,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:14,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069164843] [2021-12-22 00:03:14,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069164843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:14,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:14,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:03:14,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241411140] [2021-12-22 00:03:14,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:14,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:03:14,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:03:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:14,810 INFO L87 Difference]: Start difference. First operand 438 states and 558 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:15,226 INFO L93 Difference]: Finished difference Result 836 states and 1072 transitions. [2021-12-22 00:03:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-22 00:03:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:15,228 INFO L225 Difference]: With dead ends: 836 [2021-12-22 00:03:15,228 INFO L226 Difference]: Without dead ends: 836 [2021-12-22 00:03:15,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:03:15,228 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 683 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:15,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 855 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-12-22 00:03:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 439. [2021-12-22 00:03:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 382 states have (on average 1.4005235602094241) internal successors, (535), 419 states have internal predecessors, (535), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 00:03:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 559 transitions. [2021-12-22 00:03:15,234 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 559 transitions. Word has length 48 [2021-12-22 00:03:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:15,234 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 559 transitions. [2021-12-22 00:03:15,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 559 transitions. [2021-12-22 00:03:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 00:03:15,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:15,235 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:15,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-22 00:03:15,236 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -102248430, now seen corresponding path program 1 times [2021-12-22 00:03:15,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:15,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482949366] [2021-12-22 00:03:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:15,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:15,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482949366] [2021-12-22 00:03:15,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482949366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:15,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:15,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:15,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555981747] [2021-12-22 00:03:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:15,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:15,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:15,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:15,339 INFO L87 Difference]: Start difference. First operand 439 states and 559 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:15,477 INFO L93 Difference]: Finished difference Result 454 states and 572 transitions. [2021-12-22 00:03:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-22 00:03:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:15,478 INFO L225 Difference]: With dead ends: 454 [2021-12-22 00:03:15,478 INFO L226 Difference]: Without dead ends: 454 [2021-12-22 00:03:15,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:15,479 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 393 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:15,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 318 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-22 00:03:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 436. [2021-12-22 00:03:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 380 states have (on average 1.394736842105263) internal successors, (530), 416 states have internal predecessors, (530), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 00:03:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 554 transitions. [2021-12-22 00:03:15,486 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 554 transitions. Word has length 48 [2021-12-22 00:03:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:15,486 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 554 transitions. [2021-12-22 00:03:15,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 554 transitions. [2021-12-22 00:03:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 00:03:15,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:15,487 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:15,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-22 00:03:15,487 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:15,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1483644560, now seen corresponding path program 1 times [2021-12-22 00:03:15,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:15,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402403399] [2021-12-22 00:03:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:15,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 00:03:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:03:15,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402403399] [2021-12-22 00:03:15,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402403399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:15,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:15,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:15,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369237032] [2021-12-22 00:03:15,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:15,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:15,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:15,588 INFO L87 Difference]: Start difference. First operand 436 states and 554 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:03:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:15,737 INFO L93 Difference]: Finished difference Result 503 states and 640 transitions. [2021-12-22 00:03:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:03:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-22 00:03:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:15,739 INFO L225 Difference]: With dead ends: 503 [2021-12-22 00:03:15,739 INFO L226 Difference]: Without dead ends: 503 [2021-12-22 00:03:15,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:15,739 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 342 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:15,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 316 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-12-22 00:03:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 434. [2021-12-22 00:03:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 380 states have (on average 1.3631578947368421) internal successors, (518), 414 states have internal predecessors, (518), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 00:03:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 542 transitions. [2021-12-22 00:03:15,747 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 542 transitions. Word has length 50 [2021-12-22 00:03:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:15,747 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 542 transitions. [2021-12-22 00:03:15,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:03:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 542 transitions. [2021-12-22 00:03:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 00:03:15,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:15,748 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:15,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-22 00:03:15,749 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash -952792567, now seen corresponding path program 1 times [2021-12-22 00:03:15,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:15,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259611275] [2021-12-22 00:03:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:15,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:15,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:15,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259611275] [2021-12-22 00:03:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259611275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:15,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354707359] [2021-12-22 00:03:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:15,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:15,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:15,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:15,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 00:03:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 00:03:16,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:16,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:03:16,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-22 00:03:17,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:17,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 9 [2021-12-22 00:03:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:17,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:17,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354707359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:17,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:17,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2021-12-22 00:03:17,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445995539] [2021-12-22 00:03:17,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:17,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:17,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:17,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:17,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:03:17,174 INFO L87 Difference]: Start difference. First operand 434 states and 542 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:17,489 INFO L93 Difference]: Finished difference Result 583 states and 711 transitions. [2021-12-22 00:03:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-22 00:03:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:17,491 INFO L225 Difference]: With dead ends: 583 [2021-12-22 00:03:17,491 INFO L226 Difference]: Without dead ends: 583 [2021-12-22 00:03:17,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:03:17,492 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 186 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:17,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1223 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 419 Invalid, 0 Unknown, 152 Unchecked, 0.2s Time] [2021-12-22 00:03:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-22 00:03:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 504. [2021-12-22 00:03:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 447 states have (on average 1.3512304250559284) internal successors, (604), 482 states have internal predecessors, (604), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 16 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 634 transitions. [2021-12-22 00:03:17,501 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 634 transitions. Word has length 51 [2021-12-22 00:03:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:17,501 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 634 transitions. [2021-12-22 00:03:17,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 634 transitions. [2021-12-22 00:03:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 00:03:17,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:17,502 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:17,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:17,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:17,716 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:17,716 INFO L85 PathProgramCache]: Analyzing trace with hash -952792566, now seen corresponding path program 1 times [2021-12-22 00:03:17,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:17,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380530875] [2021-12-22 00:03:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:17,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:17,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:18,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:18,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380530875] [2021-12-22 00:03:18,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380530875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:18,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:18,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:03:18,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898821571] [2021-12-22 00:03:18,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:18,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:18,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:18,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:18,010 INFO L87 Difference]: Start difference. First operand 504 states and 634 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:18,842 INFO L93 Difference]: Finished difference Result 1561 states and 1967 transitions. [2021-12-22 00:03:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 00:03:18,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-22 00:03:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:18,848 INFO L225 Difference]: With dead ends: 1561 [2021-12-22 00:03:18,848 INFO L226 Difference]: Without dead ends: 1561 [2021-12-22 00:03:18,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:03:18,849 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 1318 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:18,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 1239 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-12-22 00:03:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 752. [2021-12-22 00:03:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 683 states have (on average 1.357247437774524) internal successors, (927), 721 states have internal predecessors, (927), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 22 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 975 transitions. [2021-12-22 00:03:18,865 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 975 transitions. Word has length 51 [2021-12-22 00:03:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:18,865 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 975 transitions. [2021-12-22 00:03:18,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 975 transitions. [2021-12-22 00:03:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 00:03:18,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:18,866 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:18,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-22 00:03:18,866 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -950945525, now seen corresponding path program 1 times [2021-12-22 00:03:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826646083] [2021-12-22 00:03:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:18,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:19,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:19,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:19,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826646083] [2021-12-22 00:03:19,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826646083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:19,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:19,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 00:03:19,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414637965] [2021-12-22 00:03:19,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:19,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:03:19,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:19,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:03:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:19,387 INFO L87 Difference]: Start difference. First operand 752 states and 975 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:19,905 INFO L93 Difference]: Finished difference Result 859 states and 1098 transitions. [2021-12-22 00:03:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:19,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-22 00:03:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:19,906 INFO L225 Difference]: With dead ends: 859 [2021-12-22 00:03:19,907 INFO L226 Difference]: Without dead ends: 859 [2021-12-22 00:03:19,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:03:19,907 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 242 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:19,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1026 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-12-22 00:03:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 707. [2021-12-22 00:03:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 642 states have (on average 1.35202492211838) internal successors, (868), 678 states have internal predecessors, (868), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 910 transitions. [2021-12-22 00:03:19,921 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 910 transitions. Word has length 51 [2021-12-22 00:03:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:19,921 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 910 transitions. [2021-12-22 00:03:19,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 910 transitions. [2021-12-22 00:03:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 00:03:19,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:19,921 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:19,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-22 00:03:19,922 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:19,922 INFO L85 PathProgramCache]: Analyzing trace with hash 764231220, now seen corresponding path program 1 times [2021-12-22 00:03:19,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:19,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104718474] [2021-12-22 00:03:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:19,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:20,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104718474] [2021-12-22 00:03:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104718474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997134198] [2021-12-22 00:03:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:20,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:20,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:20,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 00:03:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 00:03:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:20,358 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:03:20,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:03:20,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:03:20,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:03:20,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:20,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 00:03:20,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:20,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 00:03:20,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-22 00:03:20,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-22 00:03:20,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 00:03:20,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 00:03:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:20,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:20,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997134198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:20,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:20,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 23 [2021-12-22 00:03:20,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346950075] [2021-12-22 00:03:20,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:20,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:20,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-22 00:03:20,784 INFO L87 Difference]: Start difference. First operand 707 states and 910 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:21,550 INFO L93 Difference]: Finished difference Result 1326 states and 1648 transitions. [2021-12-22 00:03:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:03:21,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-22 00:03:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:21,553 INFO L225 Difference]: With dead ends: 1326 [2021-12-22 00:03:21,553 INFO L226 Difference]: Without dead ends: 1326 [2021-12-22 00:03:21,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-12-22 00:03:21,553 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 716 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:21,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 1919 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-12-22 00:03:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 710. [2021-12-22 00:03:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 645 states have (on average 1.3488372093023255) internal successors, (870), 681 states have internal predecessors, (870), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 912 transitions. [2021-12-22 00:03:21,564 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 912 transitions. Word has length 52 [2021-12-22 00:03:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:21,564 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 912 transitions. [2021-12-22 00:03:21,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 912 transitions. [2021-12-22 00:03:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 00:03:21,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:21,565 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:21,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:21,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:21,779 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 945744203, now seen corresponding path program 1 times [2021-12-22 00:03:21,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:21,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769372856] [2021-12-22 00:03:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:21,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:22,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:22,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769372856] [2021-12-22 00:03:22,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769372856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:22,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604460874] [2021-12-22 00:03:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:22,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:22,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:22,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:22,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 00:03:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-22 00:03:22,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:22,532 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 00:03:22,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 00:03:22,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:03:22,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:03:22,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:03:22,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:03:22,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:03:22,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:03:23,071 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-22 00:03:23,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-22 00:03:23,082 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 00:03:23,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 00:03:23,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:23,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:23,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 28 [2021-12-22 00:03:23,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:23,688 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 00:03:23,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 10 [2021-12-22 00:03:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:23,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:24,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604460874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:24,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:03:24,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 21 [2021-12-22 00:03:24,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620531315] [2021-12-22 00:03:24,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:24,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 00:03:24,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 00:03:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=801, Unknown=5, NotChecked=0, Total=930 [2021-12-22 00:03:24,700 INFO L87 Difference]: Start difference. First operand 710 states and 912 transitions. Second operand has 22 states, 21 states have (on average 4.761904761904762) internal successors, (100), 20 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:03:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:25,554 INFO L93 Difference]: Finished difference Result 840 states and 1061 transitions. [2021-12-22 00:03:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 00:03:25,554 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.761904761904762) internal successors, (100), 20 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-22 00:03:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:25,556 INFO L225 Difference]: With dead ends: 840 [2021-12-22 00:03:25,556 INFO L226 Difference]: Without dead ends: 840 [2021-12-22 00:03:25,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=1658, Unknown=5, NotChecked=0, Total=1980 [2021-12-22 00:03:25,557 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 402 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:25,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 2035 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 665 Invalid, 0 Unknown, 337 Unchecked, 0.3s Time] [2021-12-22 00:03:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-12-22 00:03:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 776. [2021-12-22 00:03:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 708 states have (on average 1.3432203389830508) internal successors, (951), 745 states have internal predecessors, (951), 15 states have call successors, (15), 8 states have call predecessors, (15), 16 states have return successors, (30), 22 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-22 00:03:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 996 transitions. [2021-12-22 00:03:25,567 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 996 transitions. Word has length 52 [2021-12-22 00:03:25,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:25,567 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 996 transitions. [2021-12-22 00:03:25,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.761904761904762) internal successors, (100), 20 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:03:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 996 transitions. [2021-12-22 00:03:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 00:03:25,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:25,568 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:25,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:25,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:25,783 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash 945744204, now seen corresponding path program 1 times [2021-12-22 00:03:25,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:25,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760004470] [2021-12-22 00:03:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:25,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:26,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:26,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760004470] [2021-12-22 00:03:26,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760004470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:26,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:26,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 00:03:26,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507974810] [2021-12-22 00:03:26,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:26,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:26,074 INFO L87 Difference]: Start difference. First operand 776 states and 996 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:26,898 INFO L93 Difference]: Finished difference Result 1538 states and 1900 transitions. [2021-12-22 00:03:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:03:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-22 00:03:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:26,901 INFO L225 Difference]: With dead ends: 1538 [2021-12-22 00:03:26,901 INFO L226 Difference]: Without dead ends: 1538 [2021-12-22 00:03:26,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-12-22 00:03:26,902 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 1099 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:26,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 2192 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 00:03:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-22 00:03:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 698. [2021-12-22 00:03:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 633 states have (on average 1.3554502369668247) internal successors, (858), 669 states have internal predecessors, (858), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 900 transitions. [2021-12-22 00:03:26,913 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 900 transitions. Word has length 52 [2021-12-22 00:03:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:26,914 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 900 transitions. [2021-12-22 00:03:26,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 900 transitions. [2021-12-22 00:03:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 00:03:26,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:26,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-22 00:03:26,915 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash -689191823, now seen corresponding path program 1 times [2021-12-22 00:03:26,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:26,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892790724] [2021-12-22 00:03:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:26,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:27,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:27,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:27,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892790724] [2021-12-22 00:03:27,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892790724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:27,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:27,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-22 00:03:27,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969675227] [2021-12-22 00:03:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:27,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 00:03:27,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 00:03:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:03:27,264 INFO L87 Difference]: Start difference. First operand 698 states and 900 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:29,021 INFO L93 Difference]: Finished difference Result 1954 states and 2517 transitions. [2021-12-22 00:03:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-22 00:03:29,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 00:03:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:29,031 INFO L225 Difference]: With dead ends: 1954 [2021-12-22 00:03:29,031 INFO L226 Difference]: Without dead ends: 1954 [2021-12-22 00:03:29,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=480, Invalid=1682, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 00:03:29,032 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 2318 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:29,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2328 Valid, 2017 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 00:03:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-12-22 00:03:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 818. [2021-12-22 00:03:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 741 states have (on average 1.3522267206477734) internal successors, (1002), 780 states have internal predecessors, (1002), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 27 states have call predecessors, (40), 20 states have call successors, (40) [2021-12-22 00:03:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1062 transitions. [2021-12-22 00:03:29,045 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1062 transitions. Word has length 53 [2021-12-22 00:03:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:29,045 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1062 transitions. [2021-12-22 00:03:29,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1062 transitions. [2021-12-22 00:03:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 00:03:29,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:29,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:29,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-22 00:03:29,046 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash -689191822, now seen corresponding path program 1 times [2021-12-22 00:03:29,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:29,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251167939] [2021-12-22 00:03:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:29,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:29,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:29,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:29,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251167939] [2021-12-22 00:03:29,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251167939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:29,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:29,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-22 00:03:29,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337154028] [2021-12-22 00:03:29,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:29,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 00:03:29,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:29,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 00:03:29,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:03:29,459 INFO L87 Difference]: Start difference. First operand 818 states and 1062 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:30,635 INFO L93 Difference]: Finished difference Result 1761 states and 2266 transitions. [2021-12-22 00:03:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 00:03:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 00:03:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:30,638 INFO L225 Difference]: With dead ends: 1761 [2021-12-22 00:03:30,638 INFO L226 Difference]: Without dead ends: 1761 [2021-12-22 00:03:30,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 00:03:30,638 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 2289 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:30,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2291 Valid, 1220 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-12-22 00:03:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 818. [2021-12-22 00:03:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 741 states have (on average 1.3508771929824561) internal successors, (1001), 780 states have internal predecessors, (1001), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 27 states have call predecessors, (40), 20 states have call successors, (40) [2021-12-22 00:03:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1061 transitions. [2021-12-22 00:03:30,650 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1061 transitions. Word has length 53 [2021-12-22 00:03:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:30,650 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1061 transitions. [2021-12-22 00:03:30,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1061 transitions. [2021-12-22 00:03:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 00:03:30,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:30,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:30,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-22 00:03:30,651 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:30,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash -687344781, now seen corresponding path program 1 times [2021-12-22 00:03:30,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:30,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254670001] [2021-12-22 00:03:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:30,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:30,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:30,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254670001] [2021-12-22 00:03:30,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254670001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:30,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:30,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:03:30,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262957877] [2021-12-22 00:03:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:30,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:30,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:30,825 INFO L87 Difference]: Start difference. First operand 818 states and 1061 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:31,263 INFO L93 Difference]: Finished difference Result 1574 states and 2047 transitions. [2021-12-22 00:03:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:03:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 00:03:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:31,266 INFO L225 Difference]: With dead ends: 1574 [2021-12-22 00:03:31,266 INFO L226 Difference]: Without dead ends: 1574 [2021-12-22 00:03:31,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-12-22 00:03:31,267 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 933 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:31,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 1053 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-12-22 00:03:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1141. [2021-12-22 00:03:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1028 states have (on average 1.3375486381322956) internal successors, (1375), 1076 states have internal predecessors, (1375), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 45 states have call predecessors, (76), 38 states have call successors, (76) [2021-12-22 00:03:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1489 transitions. [2021-12-22 00:03:31,278 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1489 transitions. Word has length 53 [2021-12-22 00:03:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:31,279 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1489 transitions. [2021-12-22 00:03:31,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1489 transitions. [2021-12-22 00:03:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 00:03:31,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:31,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:31,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-22 00:03:31,280 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash -687344780, now seen corresponding path program 1 times [2021-12-22 00:03:31,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:31,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459731496] [2021-12-22 00:03:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:31,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:31,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459731496] [2021-12-22 00:03:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459731496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:31,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:31,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 00:03:31,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745463210] [2021-12-22 00:03:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:31,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 00:03:31,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 00:03:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:31,550 INFO L87 Difference]: Start difference. First operand 1141 states and 1489 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:32,002 INFO L93 Difference]: Finished difference Result 1495 states and 1941 transitions. [2021-12-22 00:03:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 00:03:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:32,005 INFO L225 Difference]: With dead ends: 1495 [2021-12-22 00:03:32,005 INFO L226 Difference]: Without dead ends: 1495 [2021-12-22 00:03:32,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:03:32,006 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 928 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:32,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 873 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-12-22 00:03:32,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1218. [2021-12-22 00:03:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1097 states have (on average 1.3409298085688242) internal successors, (1471), 1147 states have internal predecessors, (1471), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 49 states have call predecessors, (84), 42 states have call successors, (84) [2021-12-22 00:03:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1597 transitions. [2021-12-22 00:03:32,029 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1597 transitions. Word has length 53 [2021-12-22 00:03:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:32,029 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1597 transitions. [2021-12-22 00:03:32,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1597 transitions. [2021-12-22 00:03:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 00:03:32,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:32,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:32,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-22 00:03:32,030 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:32,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:32,031 INFO L85 PathProgramCache]: Analyzing trace with hash -887259092, now seen corresponding path program 1 times [2021-12-22 00:03:32,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:32,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943292713] [2021-12-22 00:03:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:32,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:32,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:32,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943292713] [2021-12-22 00:03:32,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943292713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:32,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:32,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 00:03:32,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146913481] [2021-12-22 00:03:32,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:32,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:32,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:32,262 INFO L87 Difference]: Start difference. First operand 1218 states and 1597 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:33,029 INFO L93 Difference]: Finished difference Result 2637 states and 3465 transitions. [2021-12-22 00:03:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 00:03:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 00:03:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:33,033 INFO L225 Difference]: With dead ends: 2637 [2021-12-22 00:03:33,033 INFO L226 Difference]: Without dead ends: 2637 [2021-12-22 00:03:33,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-12-22 00:03:33,034 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 1052 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:33,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 2013 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-12-22 00:03:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1549. [2021-12-22 00:03:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1404 states have (on average 1.3418803418803418) internal successors, (1884), 1460 states have internal predecessors, (1884), 54 states have call successors, (54), 27 states have call predecessors, (54), 54 states have return successors, (108), 61 states have call predecessors, (108), 54 states have call successors, (108) [2021-12-22 00:03:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 2046 transitions. [2021-12-22 00:03:33,053 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 2046 transitions. Word has length 53 [2021-12-22 00:03:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:33,053 INFO L470 AbstractCegarLoop]: Abstraction has 1549 states and 2046 transitions. [2021-12-22 00:03:33,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 2046 transitions. [2021-12-22 00:03:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 00:03:33,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:33,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:33,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-22 00:03:33,054 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash -887259091, now seen corresponding path program 1 times [2021-12-22 00:03:33,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:33,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594672795] [2021-12-22 00:03:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:33,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:33,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:33,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:33,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594672795] [2021-12-22 00:03:33,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594672795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:33,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:33,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:03:33,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350437983] [2021-12-22 00:03:33,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:33,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:33,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:33,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:33,427 INFO L87 Difference]: Start difference. First operand 1549 states and 2046 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:34,311 INFO L93 Difference]: Finished difference Result 2618 states and 3447 transitions. [2021-12-22 00:03:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:03:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 00:03:34,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:34,314 INFO L225 Difference]: With dead ends: 2618 [2021-12-22 00:03:34,314 INFO L226 Difference]: Without dead ends: 2618 [2021-12-22 00:03:34,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-12-22 00:03:34,314 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 850 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:34,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1901 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 00:03:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-12-22 00:03:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1332. [2021-12-22 00:03:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1211 states have (on average 1.347646573080099) internal successors, (1632), 1261 states have internal predecessors, (1632), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 49 states have call predecessors, (84), 42 states have call successors, (84) [2021-12-22 00:03:34,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1758 transitions. [2021-12-22 00:03:34,332 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1758 transitions. Word has length 53 [2021-12-22 00:03:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:34,333 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 1758 transitions. [2021-12-22 00:03:34,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1758 transitions. [2021-12-22 00:03:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 00:03:34,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:34,334 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:34,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-22 00:03:34,334 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash 109888723, now seen corresponding path program 1 times [2021-12-22 00:03:34,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:34,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6358293] [2021-12-22 00:03:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:34,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:34,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:34,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6358293] [2021-12-22 00:03:34,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6358293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:34,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:34,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 00:03:34,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300605950] [2021-12-22 00:03:34,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:34,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:34,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:34,578 INFO L87 Difference]: Start difference. First operand 1332 states and 1758 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:34,896 INFO L93 Difference]: Finished difference Result 1732 states and 2277 transitions. [2021-12-22 00:03:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:34,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-22 00:03:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:34,899 INFO L225 Difference]: With dead ends: 1732 [2021-12-22 00:03:34,899 INFO L226 Difference]: Without dead ends: 1732 [2021-12-22 00:03:34,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-12-22 00:03:34,899 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 1130 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:34,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 951 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-12-22 00:03:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1421. [2021-12-22 00:03:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1292 states have (on average 1.3506191950464397) internal successors, (1745), 1344 states have internal predecessors, (1745), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 53 states have call predecessors, (92), 46 states have call successors, (92) [2021-12-22 00:03:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1883 transitions. [2021-12-22 00:03:34,915 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1883 transitions. Word has length 54 [2021-12-22 00:03:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:34,915 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1883 transitions. [2021-12-22 00:03:34,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1883 transitions. [2021-12-22 00:03:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 00:03:34,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:34,916 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:34,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-22 00:03:34,917 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash 167147025, now seen corresponding path program 1 times [2021-12-22 00:03:34,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:34,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643572821] [2021-12-22 00:03:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:34,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:35,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:35,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:35,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643572821] [2021-12-22 00:03:35,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643572821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:35,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:35,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:03:35,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001755811] [2021-12-22 00:03:35,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:35,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 00:03:35,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 00:03:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:35,096 INFO L87 Difference]: Start difference. First operand 1421 states and 1883 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:35,372 INFO L93 Difference]: Finished difference Result 2036 states and 2686 transitions. [2021-12-22 00:03:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-22 00:03:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:35,375 INFO L225 Difference]: With dead ends: 2036 [2021-12-22 00:03:35,375 INFO L226 Difference]: Without dead ends: 2036 [2021-12-22 00:03:35,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:03:35,376 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 923 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:35,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 973 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-12-22 00:03:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1715. [2021-12-22 00:03:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1554 states have (on average 1.3468468468468469) internal successors, (2093), 1614 states have internal predecessors, (2093), 62 states have call successors, (62), 31 states have call predecessors, (62), 62 states have return successors, (124), 69 states have call predecessors, (124), 62 states have call successors, (124) [2021-12-22 00:03:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2279 transitions. [2021-12-22 00:03:35,393 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2279 transitions. Word has length 54 [2021-12-22 00:03:35,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:35,393 INFO L470 AbstractCegarLoop]: Abstraction has 1715 states and 2279 transitions. [2021-12-22 00:03:35,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:35,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2279 transitions. [2021-12-22 00:03:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 00:03:35,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:35,395 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:35,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-22 00:03:35,395 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1735229320, now seen corresponding path program 1 times [2021-12-22 00:03:35,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877430263] [2021-12-22 00:03:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:35,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:35,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:35,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:35,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877430263] [2021-12-22 00:03:35,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877430263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:35,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:35,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 00:03:35,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875235219] [2021-12-22 00:03:35,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:35,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:35,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:35,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:35,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:35,620 INFO L87 Difference]: Start difference. First operand 1715 states and 2279 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:36,346 INFO L93 Difference]: Finished difference Result 3043 states and 4052 transitions. [2021-12-22 00:03:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 00:03:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-22 00:03:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:36,363 INFO L225 Difference]: With dead ends: 3043 [2021-12-22 00:03:36,363 INFO L226 Difference]: Without dead ends: 3043 [2021-12-22 00:03:36,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 00:03:36,364 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 846 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:36,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 2544 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2021-12-22 00:03:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 1497. [2021-12-22 00:03:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1360 states have (on average 1.35) internal successors, (1836), 1414 states have internal predecessors, (1836), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 57 states have call predecessors, (100), 50 states have call successors, (100) [2021-12-22 00:03:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 1986 transitions. [2021-12-22 00:03:36,384 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 1986 transitions. Word has length 54 [2021-12-22 00:03:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:36,384 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 1986 transitions. [2021-12-22 00:03:36,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 1986 transitions. [2021-12-22 00:03:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 00:03:36,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:36,386 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:36,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-22 00:03:36,386 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1769661897, now seen corresponding path program 1 times [2021-12-22 00:03:36,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:36,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634847499] [2021-12-22 00:03:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:36,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:36,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634847499] [2021-12-22 00:03:36,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634847499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:36,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:36,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 00:03:36,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438514095] [2021-12-22 00:03:36,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 00:03:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 00:03:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:03:36,742 INFO L87 Difference]: Start difference. First operand 1497 states and 1986 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:38,199 INFO L93 Difference]: Finished difference Result 2770 states and 3674 transitions. [2021-12-22 00:03:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-22 00:03:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-22 00:03:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:38,208 INFO L225 Difference]: With dead ends: 2770 [2021-12-22 00:03:38,208 INFO L226 Difference]: Without dead ends: 2770 [2021-12-22 00:03:38,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=439, Invalid=1541, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 00:03:38,214 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 2276 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2278 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:38,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2278 Valid, 1306 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-12-22 00:03:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1509. [2021-12-22 00:03:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1372 states have (on average 1.349125364431487) internal successors, (1851), 1426 states have internal predecessors, (1851), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 57 states have call predecessors, (100), 50 states have call successors, (100) [2021-12-22 00:03:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 2001 transitions. [2021-12-22 00:03:38,239 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 2001 transitions. Word has length 56 [2021-12-22 00:03:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:38,240 INFO L470 AbstractCegarLoop]: Abstraction has 1509 states and 2001 transitions. [2021-12-22 00:03:38,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 2001 transitions. [2021-12-22 00:03:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 00:03:38,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:38,241 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:38,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-22 00:03:38,241 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1715958773, now seen corresponding path program 1 times [2021-12-22 00:03:38,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385621467] [2021-12-22 00:03:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:38,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:38,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385621467] [2021-12-22 00:03:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385621467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:38,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:38,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:03:38,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026581180] [2021-12-22 00:03:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:38,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:03:38,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:03:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:38,379 INFO L87 Difference]: Start difference. First operand 1509 states and 2001 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:38,700 INFO L93 Difference]: Finished difference Result 2126 states and 2807 transitions. [2021-12-22 00:03:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:03:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-22 00:03:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:38,703 INFO L225 Difference]: With dead ends: 2126 [2021-12-22 00:03:38,703 INFO L226 Difference]: Without dead ends: 2126 [2021-12-22 00:03:38,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-12-22 00:03:38,704 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 883 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:38,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 813 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-12-22 00:03:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1803. [2021-12-22 00:03:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1634 states have (on average 1.3457772337821297) internal successors, (2199), 1696 states have internal predecessors, (2199), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-22 00:03:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2397 transitions. [2021-12-22 00:03:38,722 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2397 transitions. Word has length 56 [2021-12-22 00:03:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:38,722 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 2397 transitions. [2021-12-22 00:03:38,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2397 transitions. [2021-12-22 00:03:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 00:03:38,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:38,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:38,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-22 00:03:38,723 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -773838198, now seen corresponding path program 1 times [2021-12-22 00:03:38,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102623782] [2021-12-22 00:03:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:38,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 00:03:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 00:03:38,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:38,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102623782] [2021-12-22 00:03:38,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102623782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:38,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:38,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:38,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019248042] [2021-12-22 00:03:38,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:38,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:38,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:38,776 INFO L87 Difference]: Start difference. First operand 1803 states and 2397 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:03:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:38,835 INFO L93 Difference]: Finished difference Result 2155 states and 2840 transitions. [2021-12-22 00:03:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:38,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-12-22 00:03:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:38,838 INFO L225 Difference]: With dead ends: 2155 [2021-12-22 00:03:38,838 INFO L226 Difference]: Without dead ends: 2155 [2021-12-22 00:03:38,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:38,840 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 453 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:38,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 392 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-12-22 00:03:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1802. [2021-12-22 00:03:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1634 states have (on average 1.3347613219094248) internal successors, (2181), 1695 states have internal predecessors, (2181), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-22 00:03:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2379 transitions. [2021-12-22 00:03:38,859 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2379 transitions. Word has length 57 [2021-12-22 00:03:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:38,859 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 2379 transitions. [2021-12-22 00:03:38,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:03:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2379 transitions. [2021-12-22 00:03:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 00:03:38,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:38,860 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:38,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-22 00:03:38,860 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1106607972, now seen corresponding path program 1 times [2021-12-22 00:03:38,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:38,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996621274] [2021-12-22 00:03:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:38,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:39,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996621274] [2021-12-22 00:03:39,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996621274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:39,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:39,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:03:39,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884188916] [2021-12-22 00:03:39,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:39,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:39,067 INFO L87 Difference]: Start difference. First operand 1802 states and 2379 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:39,735 INFO L93 Difference]: Finished difference Result 2781 states and 3648 transitions. [2021-12-22 00:03:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 00:03:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-22 00:03:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:39,738 INFO L225 Difference]: With dead ends: 2781 [2021-12-22 00:03:39,738 INFO L226 Difference]: Without dead ends: 2781 [2021-12-22 00:03:39,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-12-22 00:03:39,739 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 890 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:39,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 2117 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-12-22 00:03:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 1500. [2021-12-22 00:03:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1364 states have (on average 1.3394428152492668) internal successors, (1827), 1417 states have internal predecessors, (1827), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 57 states have call predecessors, (100), 50 states have call successors, (100) [2021-12-22 00:03:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1977 transitions. [2021-12-22 00:03:39,755 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1977 transitions. Word has length 56 [2021-12-22 00:03:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:39,755 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 1977 transitions. [2021-12-22 00:03:39,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:03:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1977 transitions. [2021-12-22 00:03:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 00:03:39,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:39,756 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:39,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-22 00:03:39,756 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1780819851, now seen corresponding path program 1 times [2021-12-22 00:03:39,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366011583] [2021-12-22 00:03:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:39,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:40,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:40,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 00:03:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:03:40,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:40,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366011583] [2021-12-22 00:03:40,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366011583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:40,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:40,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-22 00:03:40,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211768057] [2021-12-22 00:03:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:40,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 00:03:40,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 00:03:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:03:40,146 INFO L87 Difference]: Start difference. First operand 1500 states and 1977 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:03:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:41,408 INFO L93 Difference]: Finished difference Result 3526 states and 4713 transitions. [2021-12-22 00:03:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 00:03:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2021-12-22 00:03:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:41,413 INFO L225 Difference]: With dead ends: 3526 [2021-12-22 00:03:41,413 INFO L226 Difference]: Without dead ends: 3524 [2021-12-22 00:03:41,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 00:03:41,414 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1763 mSDsluCounter, 2365 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:41,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1763 Valid, 2621 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 00:03:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-12-22 00:03:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 1602. [2021-12-22 00:03:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1454 states have (on average 1.3321870701513068) internal successors, (1937), 1510 states have internal predecessors, (1937), 56 states have call successors, (56), 28 states have call predecessors, (56), 56 states have return successors, (112), 63 states have call predecessors, (112), 56 states have call successors, (112) [2021-12-22 00:03:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2105 transitions. [2021-12-22 00:03:41,434 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2105 transitions. Word has length 58 [2021-12-22 00:03:41,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:41,434 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 2105 transitions. [2021-12-22 00:03:41,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:03:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2105 transitions. [2021-12-22 00:03:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 00:03:41,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:41,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:41,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-22 00:03:41,436 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash 765562808, now seen corresponding path program 1 times [2021-12-22 00:03:41,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:41,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685883747] [2021-12-22 00:03:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:41,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:41,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 00:03:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:03:41,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:41,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685883747] [2021-12-22 00:03:41,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685883747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:41,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272644529] [2021-12-22 00:03:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:41,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:41,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:41,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:41,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 00:03:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-22 00:03:41,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:42,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:03:42,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:03:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:42,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-22 00:03:42,571 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-22 00:03:42,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-12-22 00:03:42,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 00:03:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:42,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:42,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272644529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:42,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:03:42,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-12-22 00:03:42,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107303092] [2021-12-22 00:03:42,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:42,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 00:03:42,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 00:03:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-12-22 00:03:42,736 INFO L87 Difference]: Start difference. First operand 1602 states and 2105 transitions. Second operand has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:03:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:43,941 INFO L93 Difference]: Finished difference Result 2802 states and 3668 transitions. [2021-12-22 00:03:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 00:03:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2021-12-22 00:03:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:43,946 INFO L225 Difference]: With dead ends: 2802 [2021-12-22 00:03:43,946 INFO L226 Difference]: Without dead ends: 2802 [2021-12-22 00:03:43,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2021-12-22 00:03:43,947 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 2879 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2880 SdHoareTripleChecker+Valid, 2452 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:43,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2880 Valid, 2452 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 00:03:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-12-22 00:03:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 1632. [2021-12-22 00:03:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1484 states have (on average 1.3335579514824798) internal successors, (1979), 1537 states have internal predecessors, (1979), 56 states have call successors, (56), 28 states have call predecessors, (56), 56 states have return successors, (112), 66 states have call predecessors, (112), 56 states have call successors, (112) [2021-12-22 00:03:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2147 transitions. [2021-12-22 00:03:43,977 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2147 transitions. Word has length 58 [2021-12-22 00:03:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:43,977 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 2147 transitions. [2021-12-22 00:03:43,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:03:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2147 transitions. [2021-12-22 00:03:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 00:03:43,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:43,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:44,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:44,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:44,187 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-22 00:03:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash 765562809, now seen corresponding path program 1 times [2021-12-22 00:03:44,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:44,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200539336] [2021-12-22 00:03:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:44,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:44,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:44,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 00:03:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:03:44,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:44,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200539336] [2021-12-22 00:03:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200539336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:44,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573970140] [2021-12-22 00:03:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:44,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:44,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:44,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:44,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 00:03:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:44,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-22 00:03:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:44,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:03:45,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:03:45,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:03:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:45,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-12-22 00:03:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:45,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-12-22 00:03:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:45,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-22 00:03:45,663 INFO L353 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-22 00:03:45,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-22 00:03:45,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:45,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 14 [2021-12-22 00:03:45,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:45,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-12-22 00:03:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:45,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:46,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573970140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:46,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:03:46,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2021-12-22 00:03:46,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027688247] [2021-12-22 00:03:46,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:46,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 00:03:46,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 00:03:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 00:03:46,314 INFO L87 Difference]: Start difference. First operand 1632 states and 2147 transitions. Second operand has 33 states, 32 states have (on average 3.34375) internal successors, (107), 30 states have internal predecessors, (107), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)