./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0214.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-0214.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 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:02:56,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:02:56,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:02:56,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:02:56,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:02:56,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:02:56,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:02:56,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:02:56,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:02:56,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:02:56,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:02:56,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:02:56,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:02:56,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:02:56,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:02:56,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:02:56,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:02:56,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:02:56,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:02:56,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:02:56,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:02:56,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:02:56,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:02:56,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:02:56,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:02:56,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:02:56,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:02:56,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:02:56,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:02:56,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:02:56,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:02:56,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:02:56,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:02:56,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:02:56,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:02:56,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:02:56,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:02:56,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:02:56,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:02:56,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:02:56,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:02:56,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:02:56,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:02:56,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:02:56,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:02:56,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:02:56,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:02:56,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:02:56,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:02:56,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:02:56,550 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:02:56,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:02:56,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:02:56,550 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:02:56,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:02:56,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:02:56,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:02:56,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:02:56,553 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:02:56,553 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:02:56,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:02:56,553 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:02:56,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:02:56,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:02:56,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:02:56,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:02:56,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:02:56,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:02:56,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:02:56,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:02:56,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:02:56,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:02:56,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:02:56,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 [2021-12-22 00:02:56,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:02:56,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:02:56,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:02:56,998 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:02:56,999 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:02:57,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0214.i [2021-12-22 00:02:57,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0978e56a/e1d12bf92a7e45748b2a75eab53585ec/FLAGc72e367a4 [2021-12-22 00:02:57,538 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:02:57,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0214.i [2021-12-22 00:02:57,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0978e56a/e1d12bf92a7e45748b2a75eab53585ec/FLAGc72e367a4 [2021-12-22 00:02:57,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0978e56a/e1d12bf92a7e45748b2a75eab53585ec [2021-12-22 00:02:57,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:02:57,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:02:57,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:02:57,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:02:57,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:02:57,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:02:57" (1/1) ... [2021-12-22 00:02:57,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d1432e 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 00:02:57,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:02:57" (1/1) ... [2021-12-22 00:02:57,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:02:57,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:02:58,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:02:58,273 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:02:58,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:02:58,341 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:02:58,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:02:58 WrapperNode [2021-12-22 00:02:58,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:02:58,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:02:58,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:02:58,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:02:58,350 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 00:02:58,363 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 00:02:58,396 INFO L137 Inliner]: procedures = 181, calls = 42, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 181 [2021-12-22 00:02:58,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:02:58,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:02:58,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:02:58,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:02:58,404 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 00:02:58,404 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 00:02:58,407 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 00:02:58,408 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 00:02:58,416 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 00:02:58,420 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 00:02:58,422 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 00:02:58,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:02:58,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:02:58,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:02:58,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:02:58,426 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 00:02:58,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:02:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:02:58,480 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 00:02:58,495 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 00:02:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-22 00:02:58,509 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-22 00:02:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 00:02:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:02:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:02:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:02:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:02:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:02:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 00:02:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 00:02:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:02:58,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:02:58,595 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:02:58,597 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:02:58,996 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:02:59,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:02:59,004 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 00:02:59,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:02:59 BoogieIcfgContainer [2021-12-22 00:02:59,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:02:59,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:02:59,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:02:59,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:02:59,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:02:57" (1/3) ... [2021-12-22 00:02:59,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fb1082 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 00:02:59,012 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 00:02:59,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fb1082 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 00:02:59,012 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 00:02:59,014 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214.i [2021-12-22 00:02:59,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:02:59,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2021-12-22 00:02:59,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:02:59,063 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 00:02:59,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2021-12-22 00:02:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 142 states have internal predecessors, (164), 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 00:02:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 00:02:59,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:59,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 00:02:59,085 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:02:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:59,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1073379816, now seen corresponding path program 1 times [2021-12-22 00:02:59,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:59,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281977838] [2021-12-22 00:02:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:59,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:59,240 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 00:02:59,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281977838] [2021-12-22 00:02:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281977838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:59,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:59,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:02:59,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358627899] [2021-12-22 00:02:59,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 00:02:59,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 00:02:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 00:02:59,276 INFO L87 Difference]: Start difference. First operand has 146 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 142 states have internal predecessors, (164), 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 00:02:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:59,305 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-12-22 00:02:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 00:02:59,306 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 00:02:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:59,313 INFO L225 Difference]: With dead ends: 146 [2021-12-22 00:02:59,314 INFO L226 Difference]: Without dead ends: 144 [2021-12-22 00:02:59,315 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 00:02:59,318 INFO L933 BasicCegarLoop]: 163 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, 163 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 00:02:59,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:02:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-22 00:02:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-22 00:02:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.869047619047619) internal successors, (157), 140 states have internal predecessors, (157), 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 00:02:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2021-12-22 00:02:59,361 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 6 [2021-12-22 00:02:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:59,361 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2021-12-22 00:02:59,362 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 00:02:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2021-12-22 00:02:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:02:59,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:59,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:59,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:02:59,363 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:02:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367911, now seen corresponding path program 1 times [2021-12-22 00:02:59,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459224979] [2021-12-22 00:02:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:59,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:59,441 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 00:02:59,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:59,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459224979] [2021-12-22 00:02:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459224979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:59,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:59,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 00:02:59,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937203062] [2021-12-22 00:02:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:59,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:02:59,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:59,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:02:59,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:02:59,444 INFO L87 Difference]: Start difference. First operand 144 states and 161 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 00:02:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:59,647 INFO L93 Difference]: Finished difference Result 279 states and 312 transitions. [2021-12-22 00:02:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:02:59,648 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 00:02:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:59,654 INFO L225 Difference]: With dead ends: 279 [2021-12-22 00:02:59,655 INFO L226 Difference]: Without dead ends: 279 [2021-12-22 00:02:59,655 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 00:02:59,660 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 142 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:59,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 209 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:02:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-22 00:02:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 193. [2021-12-22 00:02:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 130 states have (on average 1.8461538461538463) internal successors, (240), 186 states have internal predecessors, (240), 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 00:02:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 248 transitions. [2021-12-22 00:02:59,695 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 248 transitions. Word has length 7 [2021-12-22 00:02:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:59,696 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 248 transitions. [2021-12-22 00:02:59,697 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 00:02:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 248 transitions. [2021-12-22 00:02:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:02:59,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:59,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:59,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:02:59,700 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:02:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367910, now seen corresponding path program 1 times [2021-12-22 00:02:59,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:59,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564837528] [2021-12-22 00:02:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:59,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:59,843 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 00:02:59,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564837528] [2021-12-22 00:02:59,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564837528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:59,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:59,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:02:59,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857462787] [2021-12-22 00:02:59,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:59,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:02:59,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:59,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:02:59,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:02:59,846 INFO L87 Difference]: Start difference. First operand 193 states and 248 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 00:02:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:59,983 INFO L93 Difference]: Finished difference Result 342 states and 424 transitions. [2021-12-22 00:02:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:02:59,984 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 00:02:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:59,985 INFO L225 Difference]: With dead ends: 342 [2021-12-22 00:02:59,986 INFO L226 Difference]: Without dead ends: 342 [2021-12-22 00:02:59,986 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 00:02:59,987 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 145 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:59,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 350 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:02:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-22 00:03:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 270. [2021-12-22 00:03:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 201 states have (on average 1.8059701492537314) internal successors, (363), 259 states have internal predecessors, (363), 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 00:03:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 379 transitions. [2021-12-22 00:03:00,018 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 379 transitions. Word has length 7 [2021-12-22 00:03:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:00,018 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 379 transitions. [2021-12-22 00:03:00,018 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 00:03:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 379 transitions. [2021-12-22 00:03:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:03:00,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:00,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:00,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 00:03:00,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:00,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367972, now seen corresponding path program 1 times [2021-12-22 00:03:00,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:00,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203749459] [2021-12-22 00:03:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:00,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:00,126 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 00:03:00,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203749459] [2021-12-22 00:03:00,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203749459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:00,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:00,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:03:00,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877322324] [2021-12-22 00:03:00,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:00,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:00,129 INFO L87 Difference]: Start difference. First operand 270 states and 379 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 00:03:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:00,264 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2021-12-22 00:03:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:00,265 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 00:03:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:00,268 INFO L225 Difference]: With dead ends: 341 [2021-12-22 00:03:00,268 INFO L226 Difference]: Without dead ends: 341 [2021-12-22 00:03:00,268 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 00:03:00,276 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 127 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:00,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 364 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-22 00:03:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 270. [2021-12-22 00:03:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 201 states have (on average 1.8059701492537314) internal successors, (363), 259 states have internal predecessors, (363), 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 00:03:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 379 transitions. [2021-12-22 00:03:00,295 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 379 transitions. Word has length 7 [2021-12-22 00:03:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:00,295 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 379 transitions. [2021-12-22 00:03:00,296 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 00:03:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 379 transitions. [2021-12-22 00:03:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:03:00,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:00,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:00,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:03:00,297 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:00,297 INFO L85 PathProgramCache]: Analyzing trace with hash 164318064, now seen corresponding path program 1 times [2021-12-22 00:03:00,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:00,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422668724] [2021-12-22 00:03:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:00,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:00,402 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 00:03:00,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422668724] [2021-12-22 00:03:00,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422668724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:00,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:00,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:00,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314369922] [2021-12-22 00:03:00,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:00,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:00,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:00,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:00,405 INFO L87 Difference]: Start difference. First operand 270 states and 379 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 00:03:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:00,530 INFO L93 Difference]: Finished difference Result 391 states and 519 transitions. [2021-12-22 00:03:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:00,530 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 00:03:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:00,533 INFO L225 Difference]: With dead ends: 391 [2021-12-22 00:03:00,533 INFO L226 Difference]: Without dead ends: 391 [2021-12-22 00:03:00,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:00,534 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 123 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:00,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 680 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-22 00:03:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 312. [2021-12-22 00:03:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 240 states have (on average 1.7916666666666667) internal successors, (430), 299 states have internal predecessors, (430), 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 00:03:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 450 transitions. [2021-12-22 00:03:00,542 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 450 transitions. Word has length 10 [2021-12-22 00:03:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:00,542 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 450 transitions. [2021-12-22 00:03:00,542 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 00:03:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 450 transitions. [2021-12-22 00:03:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:03:00,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:00,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:00,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 00:03:00,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash 162471022, now seen corresponding path program 1 times [2021-12-22 00:03:00,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:00,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007266700] [2021-12-22 00:03:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:00,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:00,652 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 00:03:00,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007266700] [2021-12-22 00:03:00,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007266700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:00,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:00,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:00,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768294746] [2021-12-22 00:03:00,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:00,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:00,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:00,654 INFO L87 Difference]: Start difference. First operand 312 states and 450 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 00:03:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:00,802 INFO L93 Difference]: Finished difference Result 381 states and 508 transitions. [2021-12-22 00:03:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:00,804 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 00:03:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:00,806 INFO L225 Difference]: With dead ends: 381 [2021-12-22 00:03:00,806 INFO L226 Difference]: Without dead ends: 381 [2021-12-22 00:03:00,807 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 00:03:00,808 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 109 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:00,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 689 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-22 00:03:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 311. [2021-12-22 00:03:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 239 states have (on average 1.794979079497908) internal successors, (429), 298 states have internal predecessors, (429), 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 00:03:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 449 transitions. [2021-12-22 00:03:00,833 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 449 transitions. Word has length 10 [2021-12-22 00:03:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:00,834 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 449 transitions. [2021-12-22 00:03:00,834 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 00:03:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 449 transitions. [2021-12-22 00:03:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 00:03:00,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:00,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:00,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 00:03:00,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash 798891393, now seen corresponding path program 1 times [2021-12-22 00:03:00,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:00,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728173105] [2021-12-22 00:03:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:00,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:00,904 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 00:03:00,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:00,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728173105] [2021-12-22 00:03:00,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728173105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:00,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:03:00,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587151254] [2021-12-22 00:03:00,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:00,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:03:00,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:03:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:03:00,906 INFO L87 Difference]: Start difference. First operand 311 states and 449 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 00:03:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:00,972 INFO L93 Difference]: Finished difference Result 370 states and 506 transitions. [2021-12-22 00:03:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:03:00,972 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 00:03:00,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:00,974 INFO L225 Difference]: With dead ends: 370 [2021-12-22 00:03:00,974 INFO L226 Difference]: Without dead ends: 363 [2021-12-22 00:03:00,974 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 00:03:00,976 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 74 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:00,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 237 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-22 00:03:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 308. [2021-12-22 00:03:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.7966101694915255) internal successors, (424), 295 states have internal predecessors, (424), 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 00:03:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 444 transitions. [2021-12-22 00:03:01,003 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 444 transitions. Word has length 11 [2021-12-22 00:03:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:01,003 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 444 transitions. [2021-12-22 00:03:01,004 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 00:03:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 444 transitions. [2021-12-22 00:03:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:03:01,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:01,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:01,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 00:03:01,005 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:01,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1916999928, now seen corresponding path program 1 times [2021-12-22 00:03:01,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:01,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116179508] [2021-12-22 00:03:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:01,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,118 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 00:03:01,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116179508] [2021-12-22 00:03:01,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116179508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:01,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701918324] [2021-12-22 00:03:01,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:01,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:01,120 INFO L87 Difference]: Start difference. First operand 308 states and 444 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 00:03:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:01,268 INFO L93 Difference]: Finished difference Result 439 states and 552 transitions. [2021-12-22 00:03:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 13 [2021-12-22 00:03:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:01,284 INFO L225 Difference]: With dead ends: 439 [2021-12-22 00:03:01,285 INFO L226 Difference]: Without dead ends: 439 [2021-12-22 00:03:01,285 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 00:03:01,286 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 267 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:01,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 353 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-22 00:03:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 308. [2021-12-22 00:03:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.771186440677966) internal successors, (418), 295 states have internal predecessors, (418), 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 00:03:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 438 transitions. [2021-12-22 00:03:01,309 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 438 transitions. Word has length 13 [2021-12-22 00:03:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:01,310 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 438 transitions. [2021-12-22 00:03:01,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 00:03:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 438 transitions. [2021-12-22 00:03:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:03:01,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:01,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:01,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 00:03:01,312 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1916999929, now seen corresponding path program 1 times [2021-12-22 00:03:01,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:01,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215158120] [2021-12-22 00:03:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:01,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,505 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 00:03:01,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215158120] [2021-12-22 00:03:01,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215158120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:01,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103338293] [2021-12-22 00:03:01,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:01,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:01,506 INFO L87 Difference]: Start difference. First operand 308 states and 438 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 00:03:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:01,676 INFO L93 Difference]: Finished difference Result 378 states and 484 transitions. [2021-12-22 00:03:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:03:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-22 00:03:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:01,679 INFO L225 Difference]: With dead ends: 378 [2021-12-22 00:03:01,679 INFO L226 Difference]: Without dead ends: 378 [2021-12-22 00:03:01,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:01,682 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 118 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:01,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 660 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-22 00:03:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 318. [2021-12-22 00:03:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 243 states have (on average 1.7530864197530864) internal successors, (426), 303 states have internal predecessors, (426), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-22 00:03:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 452 transitions. [2021-12-22 00:03:01,710 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 452 transitions. Word has length 13 [2021-12-22 00:03:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:01,711 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 452 transitions. [2021-12-22 00:03:01,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 00:03:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 452 transitions. [2021-12-22 00:03:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:03:01,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:01,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:01,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 00:03:01,712 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1917923450, now seen corresponding path program 1 times [2021-12-22 00:03:01,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:01,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830344241] [2021-12-22 00:03:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:01,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:01,906 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 00:03:01,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830344241] [2021-12-22 00:03:01,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830344241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:01,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:01,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:01,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858656902] [2021-12-22 00:03:01,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:01,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:01,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:01,908 INFO L87 Difference]: Start difference. First operand 318 states and 452 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 00:03:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:02,063 INFO L93 Difference]: Finished difference Result 377 states and 482 transitions. [2021-12-22 00:03:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:03:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-22 00:03:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:02,066 INFO L225 Difference]: With dead ends: 377 [2021-12-22 00:03:02,079 INFO L226 Difference]: Without dead ends: 377 [2021-12-22 00:03:02,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:02,081 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 113 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:02,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 682 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-22 00:03:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 312. [2021-12-22 00:03:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 240 states have (on average 1.7625) internal successors, (423), 297 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 443 transitions. [2021-12-22 00:03:02,095 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 443 transitions. Word has length 13 [2021-12-22 00:03:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:02,095 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 443 transitions. [2021-12-22 00:03:02,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 00:03:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 443 transitions. [2021-12-22 00:03:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 00:03:02,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:02,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:02,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 00:03:02,098 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash -60907143, now seen corresponding path program 1 times [2021-12-22 00:03:02,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:02,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688688025] [2021-12-22 00:03:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:02,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,156 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 00:03:02,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:02,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688688025] [2021-12-22 00:03:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688688025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:02,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:02,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583225438] [2021-12-22 00:03:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:02,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:02,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:02,160 INFO L87 Difference]: Start difference. First operand 312 states and 443 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 00:03:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:02,306 INFO L93 Difference]: Finished difference Result 489 states and 642 transitions. [2021-12-22 00:03:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:02,307 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 00:03:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:02,309 INFO L225 Difference]: With dead ends: 489 [2021-12-22 00:03:02,309 INFO L226 Difference]: Without dead ends: 489 [2021-12-22 00:03:02,310 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 00:03:02,311 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 259 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:02,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 360 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-22 00:03:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 318. [2021-12-22 00:03:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7439024390243902) internal successors, (429), 303 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 449 transitions. [2021-12-22 00:03:02,335 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 449 transitions. Word has length 15 [2021-12-22 00:03:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:02,335 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 449 transitions. [2021-12-22 00:03:02,336 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 00:03:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 449 transitions. [2021-12-22 00:03:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 00:03:02,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:02,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:02,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 00:03:02,338 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash -60907142, now seen corresponding path program 1 times [2021-12-22 00:03:02,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:02,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898210484] [2021-12-22 00:03:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:02,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:02,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898210484] [2021-12-22 00:03:02,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898210484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:02,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:02,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:02,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205597955] [2021-12-22 00:03:02,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:02,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:02,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:02,469 INFO L87 Difference]: Start difference. First operand 318 states and 449 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 00:03:02,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:02,593 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2021-12-22 00:03:02,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:02,594 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 00:03:02,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:02,595 INFO L225 Difference]: With dead ends: 375 [2021-12-22 00:03:02,595 INFO L226 Difference]: Without dead ends: 375 [2021-12-22 00:03:02,596 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 00:03:02,596 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 203 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:02,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 374 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-22 00:03:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 318. [2021-12-22 00:03:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7073170731707317) internal successors, (420), 303 states have internal predecessors, (420), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 440 transitions. [2021-12-22 00:03:02,615 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 440 transitions. Word has length 15 [2021-12-22 00:03:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:02,616 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 440 transitions. [2021-12-22 00:03:02,616 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 00:03:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 440 transitions. [2021-12-22 00:03:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:03:02,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:02,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:02,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 00:03:02,620 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1341254785, now seen corresponding path program 1 times [2021-12-22 00:03:02,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82818539] [2021-12-22 00:03:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:02,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,661 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 00:03:02,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:02,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82818539] [2021-12-22 00:03:02,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82818539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:02,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:02,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:03:02,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550485019] [2021-12-22 00:03:02,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:02,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:03:02,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:03:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:03:02,668 INFO L87 Difference]: Start difference. First operand 318 states and 440 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 00:03:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:02,746 INFO L93 Difference]: Finished difference Result 409 states and 539 transitions. [2021-12-22 00:03:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:03:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 19 [2021-12-22 00:03:02,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:02,749 INFO L225 Difference]: With dead ends: 409 [2021-12-22 00:03:02,749 INFO L226 Difference]: Without dead ends: 409 [2021-12-22 00:03:02,750 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 00:03:02,750 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 132 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:02,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 261 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-22 00:03:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 315. [2021-12-22 00:03:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.6829268292682926) internal successors, (414), 300 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 434 transitions. [2021-12-22 00:03:02,770 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 434 transitions. Word has length 19 [2021-12-22 00:03:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:02,770 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 434 transitions. [2021-12-22 00:03:02,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 00:03:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 434 transitions. [2021-12-22 00:03:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:03:02,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:02,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:03:02,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 00:03:02,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1341254786, now seen corresponding path program 1 times [2021-12-22 00:03:02,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:02,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110420207] [2021-12-22 00:03:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:02,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:02,844 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 00:03:02,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:02,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110420207] [2021-12-22 00:03:02,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110420207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:02,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:02,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:02,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438457445] [2021-12-22 00:03:02,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:02,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:02,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:02,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:02,847 INFO L87 Difference]: Start difference. First operand 315 states and 434 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 00:03:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:02,970 INFO L93 Difference]: Finished difference Result 532 states and 662 transitions. [2021-12-22 00:03:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:02,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 19 [2021-12-22 00:03:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:02,974 INFO L225 Difference]: With dead ends: 532 [2021-12-22 00:03:02,974 INFO L226 Difference]: Without dead ends: 532 [2021-12-22 00:03:02,975 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 00:03:02,975 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 283 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:02,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 459 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-22 00:03:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 318. [2021-12-22 00:03:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 250 states have (on average 1.664) internal successors, (416), 303 states have internal predecessors, (416), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 436 transitions. [2021-12-22 00:03:03,006 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 436 transitions. Word has length 19 [2021-12-22 00:03:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,006 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 436 transitions. [2021-12-22 00:03:03,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 00:03:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 436 transitions. [2021-12-22 00:03:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:03:03,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,007 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] [2021-12-22 00:03:03,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 00:03:03,007 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1370774597, now seen corresponding path program 1 times [2021-12-22 00:03:03,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606301758] [2021-12-22 00:03:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,089 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 00:03:03,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:03,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606301758] [2021-12-22 00:03:03,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606301758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:03,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:03,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:03,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849631961] [2021-12-22 00:03:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:03,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:03,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:03,091 INFO L87 Difference]: Start difference. First operand 318 states and 436 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 00:03:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,210 INFO L93 Difference]: Finished difference Result 531 states and 660 transitions. [2021-12-22 00:03:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:03,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2021-12-22 00:03:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,213 INFO L225 Difference]: With dead ends: 531 [2021-12-22 00:03:03,213 INFO L226 Difference]: Without dead ends: 531 [2021-12-22 00:03:03,213 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 00:03:03,213 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 344 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 439 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-22 00:03:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 320. [2021-12-22 00:03:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 252 states have (on average 1.6587301587301588) internal successors, (418), 305 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:03:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 438 transitions. [2021-12-22 00:03:03,241 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 438 transitions. Word has length 20 [2021-12-22 00:03:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,242 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 438 transitions. [2021-12-22 00:03:03,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 00:03:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 438 transitions. [2021-12-22 00:03:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:03:03,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,243 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] [2021-12-22 00:03:03,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 00:03:03,243 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1370718893, now seen corresponding path program 1 times [2021-12-22 00:03:03,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789300885] [2021-12-22 00:03:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,341 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 00:03:03,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:03,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789300885] [2021-12-22 00:03:03,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789300885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:03,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:03,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:03:03,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588871259] [2021-12-22 00:03:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:03,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:03,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:03,346 INFO L87 Difference]: Start difference. First operand 320 states and 438 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 00:03:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,417 INFO L93 Difference]: Finished difference Result 540 states and 713 transitions. [2021-12-22 00:03:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 20 [2021-12-22 00:03:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,421 INFO L225 Difference]: With dead ends: 540 [2021-12-22 00:03:03,422 INFO L226 Difference]: Without dead ends: 540 [2021-12-22 00:03:03,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:03,423 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 336 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1239 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-22 00:03:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 348. [2021-12-22 00:03:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 275 states have (on average 1.6254545454545455) internal successors, (447), 329 states have internal predecessors, (447), 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 00:03:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 477 transitions. [2021-12-22 00:03:03,441 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 477 transitions. Word has length 20 [2021-12-22 00:03:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,443 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 477 transitions. [2021-12-22 00:03:03,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 00:03:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 477 transitions. [2021-12-22 00:03:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:03:03,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,444 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] [2021-12-22 00:03:03,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 00:03:03,444 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1370716971, now seen corresponding path program 1 times [2021-12-22 00:03:03,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506517809] [2021-12-22 00:03:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,528 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 00:03:03,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506517809] [2021-12-22 00:03:03,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506517809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:03,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:03,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:03:03,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458889207] [2021-12-22 00:03:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:03,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:03,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:03,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:03,531 INFO L87 Difference]: Start difference. First operand 348 states and 477 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 00:03:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,621 INFO L93 Difference]: Finished difference Result 530 states and 699 transitions. [2021-12-22 00:03:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 20 [2021-12-22 00:03:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,624 INFO L225 Difference]: With dead ends: 530 [2021-12-22 00:03:03,624 INFO L226 Difference]: Without dead ends: 530 [2021-12-22 00:03:03,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:03,625 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 323 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1237 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-22 00:03:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 346. [2021-12-22 00:03:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.6227106227106227) internal successors, (443), 327 states have internal predecessors, (443), 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 00:03:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 473 transitions. [2021-12-22 00:03:03,634 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 473 transitions. Word has length 20 [2021-12-22 00:03:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,634 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 473 transitions. [2021-12-22 00:03:03,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 00:03:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 473 transitions. [2021-12-22 00:03:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:03:03,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,635 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] [2021-12-22 00:03:03,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 00:03:03,635 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1241636174, now seen corresponding path program 1 times [2021-12-22 00:03:03,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358717182] [2021-12-22 00:03:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,672 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 00:03:03,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:03,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358717182] [2021-12-22 00:03:03,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358717182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:03,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:03,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:03,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494427359] [2021-12-22 00:03:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:03,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:03,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:03,674 INFO L87 Difference]: Start difference. First operand 346 states and 473 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 00:03:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,792 INFO L93 Difference]: Finished difference Result 572 states and 718 transitions. [2021-12-22 00:03:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2021-12-22 00:03:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,794 INFO L225 Difference]: With dead ends: 572 [2021-12-22 00:03:03,795 INFO L226 Difference]: Without dead ends: 572 [2021-12-22 00:03:03,795 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 00:03:03,795 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 355 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 430 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-22 00:03:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 350. [2021-12-22 00:03:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 277 states have (on average 1.6137184115523466) internal successors, (447), 331 states have internal predecessors, (447), 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 00:03:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 477 transitions. [2021-12-22 00:03:03,804 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 477 transitions. Word has length 20 [2021-12-22 00:03:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,804 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 477 transitions. [2021-12-22 00:03:03,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 00:03:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 477 transitions. [2021-12-22 00:03:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:03:03,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,805 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] [2021-12-22 00:03:03,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 00:03:03,806 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1241634252, now seen corresponding path program 1 times [2021-12-22 00:03:03,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894182517] [2021-12-22 00:03:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:03,868 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 00:03:03,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894182517] [2021-12-22 00:03:03,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894182517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:03,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:03,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:03:03,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515389702] [2021-12-22 00:03:03,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:03,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:03,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:03,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:03,871 INFO L87 Difference]: Start difference. First operand 350 states and 477 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 00:03:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:03,939 INFO L93 Difference]: Finished difference Result 527 states and 693 transitions. [2021-12-22 00:03:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 20 [2021-12-22 00:03:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:03,941 INFO L225 Difference]: With dead ends: 527 [2021-12-22 00:03:03,941 INFO L226 Difference]: Without dead ends: 527 [2021-12-22 00:03:03,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:03,942 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 330 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:03,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1465 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-22 00:03:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 345. [2021-12-22 00:03:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 273 states have (on average 1.6080586080586081) internal successors, (439), 326 states have internal predecessors, (439), 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 00:03:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 469 transitions. [2021-12-22 00:03:03,951 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 469 transitions. Word has length 20 [2021-12-22 00:03:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:03,951 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 469 transitions. [2021-12-22 00:03:03,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 00:03:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 469 transitions. [2021-12-22 00:03:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 00:03:03,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:03,952 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 00:03:03,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 00:03:03,953 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 712638781, now seen corresponding path program 1 times [2021-12-22 00:03:03,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:03,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051074847] [2021-12-22 00:03:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:03,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,162 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 00:03:04,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:04,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051074847] [2021-12-22 00:03:04,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051074847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:04,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:04,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:03:04,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068871303] [2021-12-22 00:03:04,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:04,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:03:04,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:03:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:04,164 INFO L87 Difference]: Start difference. First operand 345 states and 469 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 00:03:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:04,661 INFO L93 Difference]: Finished difference Result 580 states and 745 transitions. [2021-12-22 00:03:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:03:04,662 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 00:03:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:04,685 INFO L225 Difference]: With dead ends: 580 [2021-12-22 00:03:04,686 INFO L226 Difference]: Without dead ends: 578 [2021-12-22 00:03:04,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:03:04,687 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 400 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:04,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1230 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-22 00:03:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 339. [2021-12-22 00:03:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.6029962546816479) internal successors, (428), 320 states have internal predecessors, (428), 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 00:03:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 458 transitions. [2021-12-22 00:03:04,697 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 458 transitions. Word has length 21 [2021-12-22 00:03:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:04,697 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 458 transitions. [2021-12-22 00:03:04,697 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 00:03:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 458 transitions. [2021-12-22 00:03:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 00:03:04,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:04,698 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 00:03:04,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 00:03:04,698 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:04,699 INFO L85 PathProgramCache]: Analyzing trace with hash 163984267, now seen corresponding path program 1 times [2021-12-22 00:03:04,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:04,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863876429] [2021-12-22 00:03:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:04,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,738 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 00:03:04,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:04,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863876429] [2021-12-22 00:03:04,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863876429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:04,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:04,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:04,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340181458] [2021-12-22 00:03:04,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:04,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:04,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:04,740 INFO L87 Difference]: Start difference. First operand 339 states and 458 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 00:03:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:04,862 INFO L93 Difference]: Finished difference Result 557 states and 693 transitions. [2021-12-22 00:03:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:04,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 00:03:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:04,864 INFO L225 Difference]: With dead ends: 557 [2021-12-22 00:03:04,864 INFO L226 Difference]: Without dead ends: 557 [2021-12-22 00:03:04,865 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 00:03:04,865 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 276 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 481 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 00:03:04,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 481 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-22 00:03:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 332. [2021-12-22 00:03:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 261 states have (on average 1.6091954022988506) internal successors, (420), 313 states have internal predecessors, (420), 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 00:03:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 450 transitions. [2021-12-22 00:03:04,879 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 450 transitions. Word has length 21 [2021-12-22 00:03:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:04,880 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 450 transitions. [2021-12-22 00:03:04,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 00:03:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 450 transitions. [2021-12-22 00:03:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 00:03:04,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:04,881 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 00:03:04,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 00:03:04,882 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708264, now seen corresponding path program 1 times [2021-12-22 00:03:04,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:04,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136187432] [2021-12-22 00:03:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:04,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:04,920 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 00:03:04,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:04,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136187432] [2021-12-22 00:03:04,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136187432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:04,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:04,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:03:04,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848354401] [2021-12-22 00:03:04,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:04,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:03:04,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:03:04,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:03:04,922 INFO L87 Difference]: Start difference. First operand 332 states and 450 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 00:03:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:05,060 INFO L93 Difference]: Finished difference Result 494 states and 639 transitions. [2021-12-22 00:03:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:03:05,061 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 00:03:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:05,062 INFO L225 Difference]: With dead ends: 494 [2021-12-22 00:03:05,063 INFO L226 Difference]: Without dead ends: 494 [2021-12-22 00:03:05,063 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 00:03:05,064 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 227 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:05,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 352 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-12-22 00:03:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 360. [2021-12-22 00:03:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 289 states have (on average 1.6332179930795847) internal successors, (472), 341 states have internal predecessors, (472), 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 00:03:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 502 transitions. [2021-12-22 00:03:05,086 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 502 transitions. Word has length 23 [2021-12-22 00:03:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:05,087 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 502 transitions. [2021-12-22 00:03:05,087 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 00:03:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 502 transitions. [2021-12-22 00:03:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 00:03:05,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:05,088 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 00:03:05,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 00:03:05,088 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708265, now seen corresponding path program 1 times [2021-12-22 00:03:05,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:05,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288477933] [2021-12-22 00:03:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:05,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,246 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 00:03:05,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288477933] [2021-12-22 00:03:05,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288477933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:05,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:05,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:05,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326240438] [2021-12-22 00:03:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:05,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:05,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:05,248 INFO L87 Difference]: Start difference. First operand 360 states and 502 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 00:03:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:05,396 INFO L93 Difference]: Finished difference Result 419 states and 533 transitions. [2021-12-22 00:03:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:05,397 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 00:03:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:05,398 INFO L225 Difference]: With dead ends: 419 [2021-12-22 00:03:05,398 INFO L226 Difference]: Without dead ends: 419 [2021-12-22 00:03:05,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:05,406 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 378 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:05,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 449 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-22 00:03:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 360. [2021-12-22 00:03:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 289 states have (on average 1.602076124567474) internal successors, (463), 341 states have internal predecessors, (463), 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 00:03:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 493 transitions. [2021-12-22 00:03:05,429 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 493 transitions. Word has length 23 [2021-12-22 00:03:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:05,430 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 493 transitions. [2021-12-22 00:03:05,430 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 00:03:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 493 transitions. [2021-12-22 00:03:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 00:03:05,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:05,430 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] [2021-12-22 00:03:05,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 00:03:05,431 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1811064258, now seen corresponding path program 1 times [2021-12-22 00:03:05,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:05,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402009500] [2021-12-22 00:03:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:05,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:05,599 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 00:03:05,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:05,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402009500] [2021-12-22 00:03:05,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402009500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:05,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:05,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:03:05,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182493668] [2021-12-22 00:03:05,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:05,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:03:05,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:03:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:05,601 INFO L87 Difference]: Start difference. First operand 360 states and 493 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 00:03:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:05,848 INFO L93 Difference]: Finished difference Result 799 states and 1037 transitions. [2021-12-22 00:03:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 00:03:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 24 [2021-12-22 00:03:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:05,851 INFO L225 Difference]: With dead ends: 799 [2021-12-22 00:03:05,852 INFO L226 Difference]: Without dead ends: 799 [2021-12-22 00:03:05,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:03:05,853 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 578 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:05,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1435 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-22 00:03:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 392. [2021-12-22 00:03:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 321 states have (on average 1.5545171339563864) internal successors, (499), 371 states have internal predecessors, (499), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 529 transitions. [2021-12-22 00:03:05,880 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 529 transitions. Word has length 24 [2021-12-22 00:03:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:05,881 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 529 transitions. [2021-12-22 00:03:05,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 00:03:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 529 transitions. [2021-12-22 00:03:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 00:03:05,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:05,882 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 00:03:05,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 00:03:05,883 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:05,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:05,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1927577074, now seen corresponding path program 1 times [2021-12-22 00:03:05,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:05,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169182126] [2021-12-22 00:03:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:05,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,025 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 00:03:06,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169182126] [2021-12-22 00:03:06,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169182126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:03:06,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354582881] [2021-12-22 00:03:06,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:03:06,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:03:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:03:06,028 INFO L87 Difference]: Start difference. First operand 392 states and 529 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 00:03:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,235 INFO L93 Difference]: Finished difference Result 632 states and 811 transitions. [2021-12-22 00:03:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:03:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 00:03:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,237 INFO L225 Difference]: With dead ends: 632 [2021-12-22 00:03:06,237 INFO L226 Difference]: Without dead ends: 632 [2021-12-22 00:03:06,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:06,237 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 241 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1363 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-22 00:03:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 394. [2021-12-22 00:03:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 323 states have (on average 1.5510835913312693) internal successors, (501), 373 states have internal predecessors, (501), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 00:03:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2021-12-22 00:03:06,248 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 25 [2021-12-22 00:03:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,248 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2021-12-22 00:03:06,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 00:03:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2021-12-22 00:03:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 00:03:06,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,249 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 00:03:06,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 00:03:06,250 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash -970840895, now seen corresponding path program 1 times [2021-12-22 00:03:06,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776180629] [2021-12-22 00:03:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,346 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 00:03:06,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776180629] [2021-12-22 00:03:06,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776180629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:06,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367590588] [2021-12-22 00:03:06,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:06,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:06,349 INFO L87 Difference]: Start difference. First operand 394 states and 531 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 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 00:03:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,553 INFO L93 Difference]: Finished difference Result 515 states and 640 transitions. [2021-12-22 00:03:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:06,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 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 00:03:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,555 INFO L225 Difference]: With dead ends: 515 [2021-12-22 00:03:06,555 INFO L226 Difference]: Without dead ends: 515 [2021-12-22 00:03:06,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:06,556 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 609 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 365 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-22 00:03:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 405. [2021-12-22 00:03:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 339 states have (on average 1.5309734513274336) internal successors, (519), 383 states have internal predecessors, (519), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-22 00:03:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 552 transitions. [2021-12-22 00:03:06,566 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 552 transitions. Word has length 26 [2021-12-22 00:03:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,566 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 552 transitions. [2021-12-22 00:03:06,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 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 00:03:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 552 transitions. [2021-12-22 00:03:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:03:06,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,566 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 00:03:06,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 00:03:06,567 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash 622100015, now seen corresponding path program 1 times [2021-12-22 00:03:06,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328217407] [2021-12-22 00:03:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,617 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 00:03:06,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328217407] [2021-12-22 00:03:06,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328217407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:06,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433138961] [2021-12-22 00:03:06,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:06,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:06,619 INFO L87 Difference]: Start difference. First operand 405 states and 552 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 00:03:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,720 INFO L93 Difference]: Finished difference Result 461 states and 604 transitions. [2021-12-22 00:03:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:06,720 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 00:03:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,722 INFO L225 Difference]: With dead ends: 461 [2021-12-22 00:03:06,722 INFO L226 Difference]: Without dead ends: 461 [2021-12-22 00:03:06,722 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 00:03:06,722 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 151 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 528 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-22 00:03:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 405. [2021-12-22 00:03:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 339 states have (on average 1.528023598820059) internal successors, (518), 383 states have internal predecessors, (518), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-22 00:03:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 551 transitions. [2021-12-22 00:03:06,732 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 551 transitions. Word has length 27 [2021-12-22 00:03:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,732 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 551 transitions. [2021-12-22 00:03:06,732 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 00:03:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 551 transitions. [2021-12-22 00:03:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:03:06,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,732 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 00:03:06,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 00:03:06,733 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash -31296654, now seen corresponding path program 1 times [2021-12-22 00:03:06,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723846969] [2021-12-22 00:03:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:06,800 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 00:03:06,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723846969] [2021-12-22 00:03:06,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723846969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:06,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:06,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:06,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696272540] [2021-12-22 00:03:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:06,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:06,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:06,802 INFO L87 Difference]: Start difference. First operand 405 states and 551 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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 00:03:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:06,955 INFO L93 Difference]: Finished difference Result 442 states and 562 transitions. [2021-12-22 00:03:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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 00:03:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:06,958 INFO L225 Difference]: With dead ends: 442 [2021-12-22 00:03:06,958 INFO L226 Difference]: Without dead ends: 442 [2021-12-22 00:03:06,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:06,959 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 392 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:06,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 726 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:06,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-22 00:03:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 403. [2021-12-22 00:03:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 339 states have (on average 1.5162241887905605) internal successors, (514), 381 states have internal predecessors, (514), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-22 00:03:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 547 transitions. [2021-12-22 00:03:06,967 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 547 transitions. Word has length 27 [2021-12-22 00:03:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:06,967 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 547 transitions. [2021-12-22 00:03:06,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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 00:03:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 547 transitions. [2021-12-22 00:03:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 00:03:06,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:06,968 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 00:03:06,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 00:03:06,968 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2105231472, now seen corresponding path program 1 times [2021-12-22 00:03:06,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:06,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621728426] [2021-12-22 00:03:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:06,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,054 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 00:03:07,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621728426] [2021-12-22 00:03:07,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621728426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:07,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178915271] [2021-12-22 00:03:07,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:07,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:07,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:07,056 INFO L87 Difference]: Start difference. First operand 403 states and 547 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 00:03:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,189 INFO L93 Difference]: Finished difference Result 528 states and 692 transitions. [2021-12-22 00:03:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:03:07,190 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 00:03:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,191 INFO L225 Difference]: With dead ends: 528 [2021-12-22 00:03:07,191 INFO L226 Difference]: Without dead ends: 528 [2021-12-22 00:03:07,191 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 00:03:07,192 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 178 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 501 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-12-22 00:03:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 441. [2021-12-22 00:03:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 373 states have (on average 1.5120643431635388) internal successors, (564), 417 states have internal predecessors, (564), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (26), 17 states have call predecessors, (26), 13 states have call successors, (26) [2021-12-22 00:03:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 603 transitions. [2021-12-22 00:03:07,200 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 603 transitions. Word has length 28 [2021-12-22 00:03:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,200 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 603 transitions. [2021-12-22 00:03:07,200 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 00:03:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 603 transitions. [2021-12-22 00:03:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 00:03:07,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,202 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] [2021-12-22 00:03:07,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 00:03:07,202 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash -11312492, now seen corresponding path program 1 times [2021-12-22 00:03:07,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042065026] [2021-12-22 00:03:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,296 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 00:03:07,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042065026] [2021-12-22 00:03:07,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042065026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:07,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573146873] [2021-12-22 00:03:07,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:07,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:07,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:07,298 INFO L87 Difference]: Start difference. First operand 441 states and 603 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 00:03:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,534 INFO L93 Difference]: Finished difference Result 552 states and 688 transitions. [2021-12-22 00:03:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:03:07,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 29 [2021-12-22 00:03:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,536 INFO L225 Difference]: With dead ends: 552 [2021-12-22 00:03:07,536 INFO L226 Difference]: Without dead ends: 552 [2021-12-22 00:03:07,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:07,536 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 711 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 333 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-12-22 00:03:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 444. [2021-12-22 00:03:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 377 states have (on average 1.5013262599469497) internal successors, (566), 418 states have internal predecessors, (566), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 19 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 608 transitions. [2021-12-22 00:03:07,545 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 608 transitions. Word has length 29 [2021-12-22 00:03:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,545 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 608 transitions. [2021-12-22 00:03:07,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 00:03:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 608 transitions. [2021-12-22 00:03:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:07,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,546 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 00:03:07,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 00:03:07,546 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash 880183511, now seen corresponding path program 1 times [2021-12-22 00:03:07,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289224466] [2021-12-22 00:03:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,581 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 00:03:07,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289224466] [2021-12-22 00:03:07,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289224466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:07,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615626208] [2021-12-22 00:03:07,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:07,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:07,583 INFO L87 Difference]: Start difference. First operand 444 states and 608 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 00:03:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,613 INFO L93 Difference]: Finished difference Result 919 states and 1272 transitions. [2021-12-22 00:03:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:07,613 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 00:03:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,615 INFO L225 Difference]: With dead ends: 919 [2021-12-22 00:03:07,616 INFO L226 Difference]: Without dead ends: 919 [2021-12-22 00:03:07,616 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 00:03:07,616 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 212 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 738 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-12-22 00:03:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 549. [2021-12-22 00:03:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 482 states have (on average 1.5145228215767634) internal successors, (730), 516 states have internal predecessors, (730), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 26 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 772 transitions. [2021-12-22 00:03:07,627 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 772 transitions. Word has length 30 [2021-12-22 00:03:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,627 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 772 transitions. [2021-12-22 00:03:07,627 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 00:03:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 772 transitions. [2021-12-22 00:03:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:07,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,628 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 00:03:07,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 00:03:07,628 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash 880185433, now seen corresponding path program 1 times [2021-12-22 00:03:07,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908181724] [2021-12-22 00:03:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,691 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 00:03:07,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908181724] [2021-12-22 00:03:07,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908181724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:07,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122771505] [2021-12-22 00:03:07,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:07,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:07,693 INFO L87 Difference]: Start difference. First operand 549 states and 772 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 00:03:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:07,889 INFO L93 Difference]: Finished difference Result 1117 states and 1535 transitions. [2021-12-22 00:03:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:07,890 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 00:03:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:07,893 INFO L225 Difference]: With dead ends: 1117 [2021-12-22 00:03:07,893 INFO L226 Difference]: Without dead ends: 1117 [2021-12-22 00:03:07,893 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 00:03:07,893 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 458 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:07,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1210 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-12-22 00:03:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 587. [2021-12-22 00:03:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 520 states have (on average 1.5096153846153846) internal successors, (785), 554 states have internal predecessors, (785), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 26 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 00:03:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 827 transitions. [2021-12-22 00:03:07,906 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 827 transitions. Word has length 30 [2021-12-22 00:03:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:07,906 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 827 transitions. [2021-12-22 00:03:07,906 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 00:03:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 827 transitions. [2021-12-22 00:03:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:07,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:07,907 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 00:03:07,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 00:03:07,907 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:07,908 INFO L85 PathProgramCache]: Analyzing trace with hash 197854354, now seen corresponding path program 1 times [2021-12-22 00:03:07,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:07,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201969659] [2021-12-22 00:03:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:07,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:07,993 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 00:03:07,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201969659] [2021-12-22 00:03:07,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201969659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:07,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:07,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:07,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519740544] [2021-12-22 00:03:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:07,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:07,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:07,994 INFO L87 Difference]: Start difference. First operand 587 states and 827 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 00:03:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:08,353 INFO L93 Difference]: Finished difference Result 1044 states and 1446 transitions. [2021-12-22 00:03:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:08,354 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 00:03:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:08,357 INFO L225 Difference]: With dead ends: 1044 [2021-12-22 00:03:08,357 INFO L226 Difference]: Without dead ends: 1044 [2021-12-22 00:03:08,357 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 00:03:08,357 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 375 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:08,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 800 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-12-22 00:03:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 630. [2021-12-22 00:03:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 559 states have (on average 1.4901610017889089) internal successors, (833), 594 states have internal predecessors, (833), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 881 transitions. [2021-12-22 00:03:08,368 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 881 transitions. Word has length 30 [2021-12-22 00:03:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:08,369 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 881 transitions. [2021-12-22 00:03:08,369 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 00:03:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 881 transitions. [2021-12-22 00:03:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:08,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:08,369 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 00:03:08,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 00:03:08,370 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash 471361208, now seen corresponding path program 1 times [2021-12-22 00:03:08,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:08,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470183765] [2021-12-22 00:03:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:08,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,406 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 00:03:08,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470183765] [2021-12-22 00:03:08,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470183765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:08,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:08,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:08,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932677450] [2021-12-22 00:03:08,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:08,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:08,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:08,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:08,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:08,408 INFO L87 Difference]: Start difference. First operand 630 states and 881 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 00:03:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:08,437 INFO L93 Difference]: Finished difference Result 925 states and 1259 transitions. [2021-12-22 00:03:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:08,437 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 00:03:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:08,440 INFO L225 Difference]: With dead ends: 925 [2021-12-22 00:03:08,440 INFO L226 Difference]: Without dead ends: 925 [2021-12-22 00:03:08,440 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 00:03:08,441 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 191 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 886 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 00:03:08,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 886 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-12-22 00:03:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 622. [2021-12-22 00:03:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 551 states have (on average 1.4900181488203266) internal successors, (821), 586 states have internal predecessors, (821), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 869 transitions. [2021-12-22 00:03:08,453 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 869 transitions. Word has length 30 [2021-12-22 00:03:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:08,454 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 869 transitions. [2021-12-22 00:03:08,454 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 00:03:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 869 transitions. [2021-12-22 00:03:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:03:08,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:08,454 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 00:03:08,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 00:03:08,455 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash 473206328, now seen corresponding path program 1 times [2021-12-22 00:03:08,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:08,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668859337] [2021-12-22 00:03:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:08,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,532 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 00:03:08,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668859337] [2021-12-22 00:03:08,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668859337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:08,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:08,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:08,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730514304] [2021-12-22 00:03:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:08,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:08,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:08,534 INFO L87 Difference]: Start difference. First operand 622 states and 869 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 00:03:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:08,714 INFO L93 Difference]: Finished difference Result 1101 states and 1484 transitions. [2021-12-22 00:03:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:08,714 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 00:03:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:08,717 INFO L225 Difference]: With dead ends: 1101 [2021-12-22 00:03:08,717 INFO L226 Difference]: Without dead ends: 1101 [2021-12-22 00:03:08,718 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 00:03:08,718 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 418 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:08,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 1388 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-12-22 00:03:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 589. [2021-12-22 00:03:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 521 states have (on average 1.4510556621881) internal successors, (756), 553 states have internal predecessors, (756), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 804 transitions. [2021-12-22 00:03:08,732 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 804 transitions. Word has length 30 [2021-12-22 00:03:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:08,732 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 804 transitions. [2021-12-22 00:03:08,732 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 00:03:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 804 transitions. [2021-12-22 00:03:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 00:03:08,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:08,733 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 00:03:08,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-22 00:03:08,733 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1838517875, now seen corresponding path program 1 times [2021-12-22 00:03:08,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:08,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980198958] [2021-12-22 00:03:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:08,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:08,864 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 00:03:08,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980198958] [2021-12-22 00:03:08,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980198958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:08,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:08,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:08,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977224723] [2021-12-22 00:03:08,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:08,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:08,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:08,867 INFO L87 Difference]: Start difference. First operand 589 states and 804 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 00:03:09,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:09,138 INFO L93 Difference]: Finished difference Result 771 states and 993 transitions. [2021-12-22 00:03:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:09,139 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 00:03:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:09,140 INFO L225 Difference]: With dead ends: 771 [2021-12-22 00:03:09,140 INFO L226 Difference]: Without dead ends: 771 [2021-12-22 00:03:09,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:09,141 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 598 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:09,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 566 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-22 00:03:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 589. [2021-12-22 00:03:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 521 states have (on average 1.4433781190019195) internal successors, (752), 553 states have internal predecessors, (752), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 800 transitions. [2021-12-22 00:03:09,161 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 800 transitions. Word has length 31 [2021-12-22 00:03:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:09,161 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 800 transitions. [2021-12-22 00:03:09,162 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 00:03:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 800 transitions. [2021-12-22 00:03:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 00:03:09,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:09,162 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 00:03:09,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-22 00:03:09,163 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:09,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:09,163 INFO L85 PathProgramCache]: Analyzing trace with hash -250351879, now seen corresponding path program 1 times [2021-12-22 00:03:09,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:09,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279511608] [2021-12-22 00:03:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:09,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,285 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 00:03:09,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:09,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279511608] [2021-12-22 00:03:09,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279511608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:09,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:09,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:09,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39341376] [2021-12-22 00:03:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:09,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:09,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:09,288 INFO L87 Difference]: Start difference. First operand 589 states and 800 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 00:03:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:09,494 INFO L93 Difference]: Finished difference Result 620 states and 832 transitions. [2021-12-22 00:03:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:03:09,495 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 00:03:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:09,496 INFO L225 Difference]: With dead ends: 620 [2021-12-22 00:03:09,496 INFO L226 Difference]: Without dead ends: 620 [2021-12-22 00:03:09,497 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 00:03:09,497 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 94 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:09,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 653 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-12-22 00:03:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 568. [2021-12-22 00:03:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 500 states have (on average 1.45) internal successors, (725), 534 states have internal predecessors, (725), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 26 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 773 transitions. [2021-12-22 00:03:09,506 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 773 transitions. Word has length 32 [2021-12-22 00:03:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:09,506 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 773 transitions. [2021-12-22 00:03:09,507 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 00:03:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 773 transitions. [2021-12-22 00:03:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 00:03:09,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:09,507 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] [2021-12-22 00:03:09,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-22 00:03:09,508 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1439584979, now seen corresponding path program 1 times [2021-12-22 00:03:09,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:09,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825583931] [2021-12-22 00:03:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:09,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 00:03:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:03:09,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:09,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825583931] [2021-12-22 00:03:09,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825583931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77388403] [2021-12-22 00:03:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:09,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:09,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:09,740 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 00:03:09,767 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 00:03:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 00:03:09,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:10,398 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 00:03:10,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:10,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:10,561 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 30 treesize of output 34 [2021-12-22 00:03:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:03:10,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77388403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:03:10,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:03:10,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 26 [2021-12-22 00:03:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880433321] [2021-12-22 00:03:10,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 00:03:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 00:03:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-22 00:03:10,803 INFO L87 Difference]: Start difference. First operand 568 states and 773 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 00:03:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:11,641 INFO L93 Difference]: Finished difference Result 856 states and 1118 transitions. [2021-12-22 00:03:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 00:03:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2021-12-22 00:03:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:11,644 INFO L225 Difference]: With dead ends: 856 [2021-12-22 00:03:11,644 INFO L226 Difference]: Without dead ends: 856 [2021-12-22 00:03:11,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 00:03:11,645 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1550 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:11,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 1962 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-12-22 00:03:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 563. [2021-12-22 00:03:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 496 states have (on average 1.4375) internal successors, (713), 531 states have internal predecessors, (713), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 761 transitions. [2021-12-22 00:03:11,669 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 761 transitions. Word has length 40 [2021-12-22 00:03:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:11,669 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 761 transitions. [2021-12-22 00:03:11,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 00:03:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 761 transitions. [2021-12-22 00:03:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 00:03:11,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:11,670 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] [2021-12-22 00:03:11,699 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 00:03:11,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-22 00:03:11,891 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 112861475, now seen corresponding path program 1 times [2021-12-22 00:03:11,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784686943] [2021-12-22 00:03:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:11,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:11,969 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 00:03:11,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:11,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784686943] [2021-12-22 00:03:11,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784686943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:11,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:11,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:11,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450758994] [2021-12-22 00:03:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:11,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:11,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:11,972 INFO L87 Difference]: Start difference. First operand 563 states and 761 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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 00:03:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:12,110 INFO L93 Difference]: Finished difference Result 640 states and 817 transitions. [2021-12-22 00:03:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:03:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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 40 [2021-12-22 00:03:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:12,113 INFO L225 Difference]: With dead ends: 640 [2021-12-22 00:03:12,113 INFO L226 Difference]: Without dead ends: 640 [2021-12-22 00:03:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:12,114 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 472 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 414 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 00:03:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 414 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-22 00:03:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 563. [2021-12-22 00:03:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 496 states have (on average 1.4375) internal successors, (713), 531 states have internal predecessors, (713), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 761 transitions. [2021-12-22 00:03:12,124 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 761 transitions. Word has length 40 [2021-12-22 00:03:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:12,124 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 761 transitions. [2021-12-22 00:03:12,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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 00:03:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 761 transitions. [2021-12-22 00:03:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 00:03:12,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:12,125 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] [2021-12-22 00:03:12,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-22 00:03:12,126 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash 112861413, now seen corresponding path program 1 times [2021-12-22 00:03:12,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:12,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308243773] [2021-12-22 00:03:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:12,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,321 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 00:03:12,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:12,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308243773] [2021-12-22 00:03:12,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308243773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:12,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:12,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:03:12,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973857657] [2021-12-22 00:03:12,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:12,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:12,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:12,324 INFO L87 Difference]: Start difference. First operand 563 states and 761 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 00:03:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:12,713 INFO L93 Difference]: Finished difference Result 912 states and 1170 transitions. [2021-12-22 00:03:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 00:03:12,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 40 [2021-12-22 00:03:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:12,715 INFO L225 Difference]: With dead ends: 912 [2021-12-22 00:03:12,715 INFO L226 Difference]: Without dead ends: 912 [2021-12-22 00:03:12,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:03:12,716 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 819 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:12,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1033 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-12-22 00:03:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 764. [2021-12-22 00:03:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 687 states have (on average 1.4599708879184863) internal successors, (1003), 724 states have internal predecessors, (1003), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2021-12-22 00:03:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1069 transitions. [2021-12-22 00:03:12,754 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1069 transitions. Word has length 40 [2021-12-22 00:03:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:12,754 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1069 transitions. [2021-12-22 00:03:12,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 00:03:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1069 transitions. [2021-12-22 00:03:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 00:03:12,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:12,755 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] [2021-12-22 00:03:12,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-22 00:03:12,756 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1897242428, now seen corresponding path program 1 times [2021-12-22 00:03:12,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:12,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196994221] [2021-12-22 00:03:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:12,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,837 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 00:03:12,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196994221] [2021-12-22 00:03:12,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196994221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:12,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:12,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:03:12,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536861913] [2021-12-22 00:03:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:12,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:12,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:12,839 INFO L87 Difference]: Start difference. First operand 764 states and 1069 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 00:03:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:12,890 INFO L93 Difference]: Finished difference Result 817 states and 1089 transitions. [2021-12-22 00:03:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:03:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 40 [2021-12-22 00:03:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:12,893 INFO L225 Difference]: With dead ends: 817 [2021-12-22 00:03:12,893 INFO L226 Difference]: Without dead ends: 817 [2021-12-22 00:03:12,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:12,893 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 154 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:12,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1174 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-22 00:03:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 764. [2021-12-22 00:03:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 687 states have (on average 1.4541484716157205) internal successors, (999), 724 states have internal predecessors, (999), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2021-12-22 00:03:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1065 transitions. [2021-12-22 00:03:12,904 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1065 transitions. Word has length 40 [2021-12-22 00:03:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:12,904 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1065 transitions. [2021-12-22 00:03:12,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 00:03:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1065 transitions. [2021-12-22 00:03:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 00:03:12,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:12,905 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] [2021-12-22 00:03:12,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-22 00:03:12,905 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash -218564434, now seen corresponding path program 1 times [2021-12-22 00:03:12,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:12,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579817909] [2021-12-22 00:03:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:12,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 00:03:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:12,966 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 00:03:12,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579817909] [2021-12-22 00:03:12,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579817909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:12,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:12,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:03:12,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982322619] [2021-12-22 00:03:12,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:12,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:03:12,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:12,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:03:12,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:03:12,968 INFO L87 Difference]: Start difference. First operand 764 states and 1065 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 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 00:03:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:13,154 INFO L93 Difference]: Finished difference Result 895 states and 1192 transitions. [2021-12-22 00:03:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:03:13,155 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), 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 42 [2021-12-22 00:03:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:13,157 INFO L225 Difference]: With dead ends: 895 [2021-12-22 00:03:13,157 INFO L226 Difference]: Without dead ends: 895 [2021-12-22 00:03:13,157 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 00:03:13,158 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 367 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:13,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 357 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-12-22 00:03:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 762. [2021-12-22 00:03:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 687 states have (on average 1.4192139737991267) internal successors, (975), 722 states have internal predecessors, (975), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2021-12-22 00:03:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1041 transitions. [2021-12-22 00:03:13,166 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1041 transitions. Word has length 42 [2021-12-22 00:03:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:13,166 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1041 transitions. [2021-12-22 00:03:13,166 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), 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 00:03:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1041 transitions. [2021-12-22 00:03:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 00:03:13,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:13,167 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] [2021-12-22 00:03:13,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-22 00:03:13,167 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1902204747, now seen corresponding path program 1 times [2021-12-22 00:03:13,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:13,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985205219] [2021-12-22 00:03:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:13,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,255 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 00:03:13,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985205219] [2021-12-22 00:03:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985205219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:13,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:13,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:03:13,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538289937] [2021-12-22 00:03:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:13,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:03:13,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:03:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:13,258 INFO L87 Difference]: Start difference. First operand 762 states and 1041 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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 00:03:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:13,391 INFO L93 Difference]: Finished difference Result 844 states and 1104 transitions. [2021-12-22 00:03:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:03:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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 41 [2021-12-22 00:03:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:13,396 INFO L225 Difference]: With dead ends: 844 [2021-12-22 00:03:13,397 INFO L226 Difference]: Without dead ends: 844 [2021-12-22 00:03:13,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:03:13,401 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 497 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:13,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 440 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-12-22 00:03:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 554. [2021-12-22 00:03:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 490 states have (on average 1.4) internal successors, (686), 522 states have internal predecessors, (686), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 00:03:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 734 transitions. [2021-12-22 00:03:13,409 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 734 transitions. Word has length 41 [2021-12-22 00:03:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:13,410 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 734 transitions. [2021-12-22 00:03:13,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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 00:03:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 734 transitions. [2021-12-22 00:03:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 00:03:13,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:13,411 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 00:03:13,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-22 00:03:13,411 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash -853472827, now seen corresponding path program 1 times [2021-12-22 00:03:13,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:13,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274739556] [2021-12-22 00:03:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:13,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 00:03:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,473 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 00:03:13,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274739556] [2021-12-22 00:03:13,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274739556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010989390] [2021-12-22 00:03:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:13,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:13,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:13,475 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 00:03:13,476 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 00:03:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 00:03:13,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:13,695 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 00:03:13,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:13,719 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:03:13,719 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 00:03:13,761 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 00:03:13,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010989390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:03:13,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:03:13,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-22 00:03:13,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535178108] [2021-12-22 00:03:13,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:13,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:13,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:13,763 INFO L87 Difference]: Start difference. First operand 554 states and 734 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 00:03:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:14,425 INFO L93 Difference]: Finished difference Result 1615 states and 2028 transitions. [2021-12-22 00:03:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:03:14,425 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 00:03:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:14,484 INFO L225 Difference]: With dead ends: 1615 [2021-12-22 00:03:14,484 INFO L226 Difference]: Without dead ends: 1615 [2021-12-22 00:03:14,484 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 00:03:14,485 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1491 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:14,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1132 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-12-22 00:03:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 675. [2021-12-22 00:03:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 603 states have (on average 1.306799336650083) internal successors, (788), 628 states have internal predecessors, (788), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 36 states have call predecessors, (48), 24 states have call successors, (48) [2021-12-22 00:03:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 860 transitions. [2021-12-22 00:03:14,497 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 860 transitions. Word has length 43 [2021-12-22 00:03:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:14,497 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 860 transitions. [2021-12-22 00:03:14,497 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 00:03:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 860 transitions. [2021-12-22 00:03:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 00:03:14,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:14,498 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] [2021-12-22 00:03:14,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 00:03:14,716 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 00:03:14,716 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -703021945, now seen corresponding path program 1 times [2021-12-22 00:03:14,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:14,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104987582] [2021-12-22 00:03:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:14,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:15,426 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 00:03:15,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:15,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104987582] [2021-12-22 00:03:15,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104987582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:15,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:15,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 00:03:15,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879188277] [2021-12-22 00:03:15,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:15,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:03:15,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:03:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:03:15,428 INFO L87 Difference]: Start difference. First operand 675 states and 860 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 00:03:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:16,200 INFO L93 Difference]: Finished difference Result 974 states and 1227 transitions. [2021-12-22 00:03:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:03:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 43 [2021-12-22 00:03:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:16,203 INFO L225 Difference]: With dead ends: 974 [2021-12-22 00:03:16,203 INFO L226 Difference]: Without dead ends: 974 [2021-12-22 00:03:16,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:03:16,204 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 500 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:16,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 1190 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-12-22 00:03:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 703. [2021-12-22 00:03:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 631 states have (on average 1.2963549920760697) internal successors, (818), 656 states have internal predecessors, (818), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 36 states have call predecessors, (48), 24 states have call successors, (48) [2021-12-22 00:03:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 890 transitions. [2021-12-22 00:03:16,215 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 890 transitions. Word has length 43 [2021-12-22 00:03:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:16,215 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 890 transitions. [2021-12-22 00:03:16,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 00:03:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 890 transitions. [2021-12-22 00:03:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:03:16,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:16,216 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] [2021-12-22 00:03:16,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-22 00:03:16,217 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:16,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:16,217 INFO L85 PathProgramCache]: Analyzing trace with hash 494131847, now seen corresponding path program 1 times [2021-12-22 00:03:16,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:16,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316956682] [2021-12-22 00:03:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:16,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:16,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:16,467 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 00:03:16,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316956682] [2021-12-22 00:03:16,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316956682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802247268] [2021-12-22 00:03:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:16,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:16,480 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 00:03:16,481 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 00:03:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:16,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 00:03:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:16,672 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 00:03:17,050 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 00:03:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:17,316 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 00:03:17,322 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 00:03:17,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:17,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802247268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:17,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:17,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-12-22 00:03:17,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414510389] [2021-12-22 00:03:17,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:17,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:17,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:17,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:17,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:03:17,324 INFO L87 Difference]: Start difference. First operand 703 states and 890 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 00:03:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:17,670 INFO L93 Difference]: Finished difference Result 1153 states and 1442 transitions. [2021-12-22 00:03:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 44 [2021-12-22 00:03:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:17,672 INFO L225 Difference]: With dead ends: 1153 [2021-12-22 00:03:17,672 INFO L226 Difference]: Without dead ends: 1153 [2021-12-22 00:03:17,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-22 00:03:17,673 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 705 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:17,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 978 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 403 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2021-12-22 00:03:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-12-22 00:03:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1021. [2021-12-22 00:03:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 931 states have (on average 1.3071965628356605) internal successors, (1217), 951 states have internal predecessors, (1217), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (74), 56 states have call predecessors, (74), 37 states have call successors, (74) [2021-12-22 00:03:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1328 transitions. [2021-12-22 00:03:17,688 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1328 transitions. Word has length 44 [2021-12-22 00:03:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:17,688 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1328 transitions. [2021-12-22 00:03:17,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 00:03:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1328 transitions. [2021-12-22 00:03:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:03:17,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:17,689 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] [2021-12-22 00:03:17,708 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 00:03:17,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:17,908 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash 494131848, now seen corresponding path program 1 times [2021-12-22 00:03:17,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221619330] [2021-12-22 00:03:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:17,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:18,211 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 00:03:18,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221619330] [2021-12-22 00:03:18,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221619330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374583578] [2021-12-22 00:03:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:18,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:18,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:18,218 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 00:03:18,220 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 00:03:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:18,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 00:03:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:18,477 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 00:03:18,967 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 00:03:18,970 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 00:03:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:19,154 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 23 treesize of output 7 [2021-12-22 00:03:19,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:19,158 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 00:03:19,205 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 00:03:19,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:19,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374583578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:19,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:19,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2021-12-22 00:03:19,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118489056] [2021-12-22 00:03:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:19,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:19,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-12-22 00:03:19,207 INFO L87 Difference]: Start difference. First operand 1021 states and 1328 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 00:03:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:19,544 INFO L93 Difference]: Finished difference Result 1108 states and 1391 transitions. [2021-12-22 00:03:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:19,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 44 [2021-12-22 00:03:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:19,546 INFO L225 Difference]: With dead ends: 1108 [2021-12-22 00:03:19,546 INFO L226 Difference]: Without dead ends: 1108 [2021-12-22 00:03:19,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-12-22 00:03:19,547 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 603 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:19,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 1176 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 390 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2021-12-22 00:03:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-12-22 00:03:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1023. [2021-12-22 00:03:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 933 states have (on average 1.3054662379421222) internal successors, (1218), 953 states have internal predecessors, (1218), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (74), 56 states have call predecessors, (74), 37 states have call successors, (74) [2021-12-22 00:03:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1329 transitions. [2021-12-22 00:03:19,558 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1329 transitions. Word has length 44 [2021-12-22 00:03:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:19,559 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1329 transitions. [2021-12-22 00:03:19,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 00:03:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1329 transitions. [2021-12-22 00:03:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:03:19,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:19,560 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] [2021-12-22 00:03:19,584 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 00:03:19,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:19,777 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash 492284805, now seen corresponding path program 1 times [2021-12-22 00:03:19,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:19,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158788422] [2021-12-22 00:03:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:19,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:20,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:20,110 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 00:03:20,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:20,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158788422] [2021-12-22 00:03:20,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158788422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299375019] [2021-12-22 00:03:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:20,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:20,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:20,136 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 00:03:20,151 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 00:03:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-22 00:03:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:20,404 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 00:03:20,691 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 00:03:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:20,804 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 00:03:20,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:20,966 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 21 treesize of output 9 [2021-12-22 00:03:20,972 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 00:03:20,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:20,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299375019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:20,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:20,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2021-12-22 00:03:20,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604577361] [2021-12-22 00:03:20,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:20,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 00:03:20,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 00:03:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-12-22 00:03:20,974 INFO L87 Difference]: Start difference. First operand 1023 states and 1329 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 00:03:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:21,244 INFO L93 Difference]: Finished difference Result 1251 states and 1605 transitions. [2021-12-22 00:03:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:03:21,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 44 [2021-12-22 00:03:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:21,246 INFO L225 Difference]: With dead ends: 1251 [2021-12-22 00:03:21,246 INFO L226 Difference]: Without dead ends: 1251 [2021-12-22 00:03:21,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 00:03:21,247 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 199 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:21,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1109 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2021-12-22 00:03:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-12-22 00:03:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1171. [2021-12-22 00:03:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1066 states have (on average 1.3067542213883678) internal successors, (1393), 1093 states have internal predecessors, (1393), 46 states have call successors, (46), 16 states have call predecessors, (46), 32 states have return successors, (92), 61 states have call predecessors, (92), 46 states have call successors, (92) [2021-12-22 00:03:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1531 transitions. [2021-12-22 00:03:21,275 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1531 transitions. Word has length 44 [2021-12-22 00:03:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:21,276 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 1531 transitions. [2021-12-22 00:03:21,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 00:03:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1531 transitions. [2021-12-22 00:03:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:03:21,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:21,277 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] [2021-12-22 00:03:21,310 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 00:03:21,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-22 00:03:21,490 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 492284806, now seen corresponding path program 1 times [2021-12-22 00:03:21,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:21,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758636876] [2021-12-22 00:03:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:21,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:21,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:21,925 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 00:03:21,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758636876] [2021-12-22 00:03:21,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758636876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939770964] [2021-12-22 00:03:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:21,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:21,926 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 00:03:21,927 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 00:03:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-22 00:03:22,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:22,131 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 00:03:22,415 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 00:03:22,419 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 00:03:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:22,506 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 27 treesize of output 26 [2021-12-22 00:03:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:22,511 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 00:03:22,628 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 00:03:22,631 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 19 treesize of output 7 [2021-12-22 00:03:22,673 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 00:03:22,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:22,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939770964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:22,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:22,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 27 [2021-12-22 00:03:22,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088349680] [2021-12-22 00:03:22,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:22,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 00:03:22,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 00:03:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-12-22 00:03:22,674 INFO L87 Difference]: Start difference. First operand 1171 states and 1531 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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 00:03:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:23,411 INFO L93 Difference]: Finished difference Result 2118 states and 2763 transitions. [2021-12-22 00:03:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 00:03:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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 44 [2021-12-22 00:03:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:23,415 INFO L225 Difference]: With dead ends: 2118 [2021-12-22 00:03:23,415 INFO L226 Difference]: Without dead ends: 2118 [2021-12-22 00:03:23,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=1347, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 00:03:23,416 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 1179 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:23,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1366 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-12-22 00:03:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1654. [2021-12-22 00:03:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1514 states have (on average 1.3262879788639366) internal successors, (2008), 1550 states have internal predecessors, (2008), 69 states have call successors, (69), 22 states have call predecessors, (69), 44 states have return successors, (138), 81 states have call predecessors, (138), 69 states have call successors, (138) [2021-12-22 00:03:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2215 transitions. [2021-12-22 00:03:23,435 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2215 transitions. Word has length 44 [2021-12-22 00:03:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:23,435 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2215 transitions. [2021-12-22 00:03:23,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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 00:03:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2215 transitions. [2021-12-22 00:03:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:03:23,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:23,436 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] [2021-12-22 00:03:23,473 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 00:03:23,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-22 00:03:23,674 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash -781098313, now seen corresponding path program 1 times [2021-12-22 00:03:23,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611372671] [2021-12-22 00:03:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:23,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:23,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:23,943 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 00:03:23,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:23,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611372671] [2021-12-22 00:03:23,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611372671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:23,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:23,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 00:03:23,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076665258] [2021-12-22 00:03:23,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:23,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 00:03:23,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:23,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 00:03:23,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:03:23,945 INFO L87 Difference]: Start difference. First operand 1654 states and 2215 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 00:03:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:24,722 INFO L93 Difference]: Finished difference Result 2135 states and 2809 transitions. [2021-12-22 00:03:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 00:03:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 44 [2021-12-22 00:03:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:24,726 INFO L225 Difference]: With dead ends: 2135 [2021-12-22 00:03:24,726 INFO L226 Difference]: Without dead ends: 2135 [2021-12-22 00:03:24,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 00:03:24,728 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 863 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:24,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1678 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-12-22 00:03:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1684. [2021-12-22 00:03:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1536 states have (on average 1.326171875) internal successors, (2037), 1576 states have internal predecessors, (2037), 69 states have call successors, (69), 26 states have call predecessors, (69), 52 states have return successors, (138), 81 states have call predecessors, (138), 69 states have call successors, (138) [2021-12-22 00:03:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2244 transitions. [2021-12-22 00:03:24,748 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2244 transitions. Word has length 44 [2021-12-22 00:03:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:24,749 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2244 transitions. [2021-12-22 00:03:24,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 00:03:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2244 transitions. [2021-12-22 00:03:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:03:24,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:24,750 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] [2021-12-22 00:03:24,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-22 00:03:24,750 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash -781098312, now seen corresponding path program 1 times [2021-12-22 00:03:24,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:24,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834187527] [2021-12-22 00:03:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:24,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:25,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:25,257 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 00:03:25,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:25,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834187527] [2021-12-22 00:03:25,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834187527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:25,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820269400] [2021-12-22 00:03:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:25,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:25,259 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 00:03:25,260 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 00:03:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:25,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 00:03:25,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:25,551 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:03:25,551 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 00:03:25,648 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 00:03:25,655 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 00:03:25,666 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 00:03:25,672 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 00:03:25,694 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 00:03:25,698 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 00:03:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:25,785 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 23 treesize of output 22 [2021-12-22 00:03:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:25,789 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 23 treesize of output 22 [2021-12-22 00:03:25,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:25,821 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 00:03:25,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:25,826 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 00:03:25,853 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 00:03:25,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:25,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820269400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:25,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:25,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 25 [2021-12-22 00:03:25,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254672094] [2021-12-22 00:03:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:25,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:03:25,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:25,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:03:25,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:03:25,855 INFO L87 Difference]: Start difference. First operand 1684 states and 2244 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 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 00:03:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:26,203 INFO L93 Difference]: Finished difference Result 1697 states and 2257 transitions. [2021-12-22 00:03:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:26,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 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 44 [2021-12-22 00:03:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:26,209 INFO L225 Difference]: With dead ends: 1697 [2021-12-22 00:03:26,209 INFO L226 Difference]: Without dead ends: 1697 [2021-12-22 00:03:26,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-12-22 00:03:26,211 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 71 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:26,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 806 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-12-22 00:03:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1689. [2021-12-22 00:03:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1541 states have (on average 1.3251135626216743) internal successors, (2042), 1581 states have internal predecessors, (2042), 69 states have call successors, (69), 26 states have call predecessors, (69), 52 states have return successors, (138), 81 states have call predecessors, (138), 69 states have call successors, (138) [2021-12-22 00:03:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2249 transitions. [2021-12-22 00:03:26,231 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2249 transitions. Word has length 44 [2021-12-22 00:03:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:26,232 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 2249 transitions. [2021-12-22 00:03:26,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 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 00:03:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2249 transitions. [2021-12-22 00:03:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:26,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:26,233 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 00:03:26,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:26,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:26,449 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1503059700, now seen corresponding path program 1 times [2021-12-22 00:03:26,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:26,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477099257] [2021-12-22 00:03:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:26,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 00:03:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:26,511 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 00:03:26,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:26,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477099257] [2021-12-22 00:03:26,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477099257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:26,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226663827] [2021-12-22 00:03:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:26,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:26,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:26,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:26,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 00:03:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 00:03:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:26,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:26,725 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 00:03:26,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:26,727 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 00:03:26,802 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 00:03:26,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:26,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226663827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:26,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:26,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-22 00:03:26,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856329351] [2021-12-22 00:03:26,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:26,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:03:26,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:26,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:03:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:03:26,805 INFO L87 Difference]: Start difference. First operand 1689 states and 2249 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 00:03:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:27,048 INFO L93 Difference]: Finished difference Result 1500 states and 1995 transitions. [2021-12-22 00:03:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:03:27,049 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 00:03:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:27,051 INFO L225 Difference]: With dead ends: 1500 [2021-12-22 00:03:27,051 INFO L226 Difference]: Without dead ends: 1500 [2021-12-22 00:03:27,051 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 00:03:27,052 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 200 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:27,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1080 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-12-22 00:03:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1283. [2021-12-22 00:03:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1169 states have (on average 1.3327630453378956) internal successors, (1558), 1200 states have internal predecessors, (1558), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-22 00:03:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1711 transitions. [2021-12-22 00:03:27,063 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1711 transitions. Word has length 45 [2021-12-22 00:03:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:27,064 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1711 transitions. [2021-12-22 00:03:27,064 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 00:03:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1711 transitions. [2021-12-22 00:03:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:27,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:27,064 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 00:03:27,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:27,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-22 00:03:27,282 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 102761101, now seen corresponding path program 1 times [2021-12-22 00:03:27,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249713157] [2021-12-22 00:03:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:27,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:27,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:27,418 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 00:03:27,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249713157] [2021-12-22 00:03:27,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249713157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:27,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:27,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 00:03:27,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174266270] [2021-12-22 00:03:27,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:27,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:03:27,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:27,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:03:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:03:27,420 INFO L87 Difference]: Start difference. First operand 1283 states and 1711 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 00:03:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:27,606 INFO L93 Difference]: Finished difference Result 1589 states and 2087 transitions. [2021-12-22 00:03:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:03:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 00:03:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:27,610 INFO L225 Difference]: With dead ends: 1589 [2021-12-22 00:03:27,610 INFO L226 Difference]: Without dead ends: 1589 [2021-12-22 00:03:27,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:03:27,610 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 923 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:27,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 1093 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:03:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-12-22 00:03:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1274. [2021-12-22 00:03:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1160 states have (on average 1.328448275862069) internal successors, (1541), 1191 states have internal predecessors, (1541), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-22 00:03:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1694 transitions. [2021-12-22 00:03:27,634 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1694 transitions. Word has length 45 [2021-12-22 00:03:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:27,634 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1694 transitions. [2021-12-22 00:03:27,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 00:03:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1694 transitions. [2021-12-22 00:03:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:27,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:27,635 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 00:03:27,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-22 00:03:27,636 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1861783222, now seen corresponding path program 1 times [2021-12-22 00:03:27,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:27,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217508503] [2021-12-22 00:03:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:27,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:27,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:27,841 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 00:03:27,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217508503] [2021-12-22 00:03:27,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217508503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:27,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769295861] [2021-12-22 00:03:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:27,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:27,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:27,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 00:03:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 00:03:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:28,300 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 00:03:28,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:28,471 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 24 treesize of output 8 [2021-12-22 00:03:28,477 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 00:03:28,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:28,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769295861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:28,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:28,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2021-12-22 00:03:28,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282916771] [2021-12-22 00:03:28,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:03:28,478 INFO L87 Difference]: Start difference. First operand 1274 states and 1694 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 00:03:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:28,639 INFO L93 Difference]: Finished difference Result 1351 states and 1770 transitions. [2021-12-22 00:03:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:28,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 00:03:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:28,648 INFO L225 Difference]: With dead ends: 1351 [2021-12-22 00:03:28,649 INFO L226 Difference]: Without dead ends: 1351 [2021-12-22 00:03:28,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-22 00:03:28,649 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 472 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:28,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1039 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2021-12-22 00:03:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-12-22 00:03:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1277. [2021-12-22 00:03:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1163 states have (on average 1.3276010318142735) internal successors, (1544), 1194 states have internal predecessors, (1544), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-22 00:03:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1697 transitions. [2021-12-22 00:03:28,662 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1697 transitions. Word has length 45 [2021-12-22 00:03:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:28,662 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 1697 transitions. [2021-12-22 00:03:28,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 00:03:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1697 transitions. [2021-12-22 00:03:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:28,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:28,663 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 00:03:28,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:28,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:28,880 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:28,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1919041524, now seen corresponding path program 1 times [2021-12-22 00:03:28,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:28,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27989041] [2021-12-22 00:03:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:28,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:29,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:29,325 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 00:03:29,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:29,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27989041] [2021-12-22 00:03:29,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27989041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:29,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:29,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-22 00:03:29,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393858499] [2021-12-22 00:03:29,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:29,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 00:03:29,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:29,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 00:03:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-22 00:03:29,327 INFO L87 Difference]: Start difference. First operand 1277 states and 1697 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 00:03:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:29,951 INFO L93 Difference]: Finished difference Result 1714 states and 2214 transitions. [2021-12-22 00:03:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 00:03:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 00:03:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:29,954 INFO L225 Difference]: With dead ends: 1714 [2021-12-22 00:03:29,954 INFO L226 Difference]: Without dead ends: 1714 [2021-12-22 00:03:29,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2021-12-22 00:03:29,954 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 1488 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:29,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1481 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-22 00:03:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1274. [2021-12-22 00:03:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1160 states have (on average 1.3267241379310344) internal successors, (1539), 1191 states have internal predecessors, (1539), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-22 00:03:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1692 transitions. [2021-12-22 00:03:29,985 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1692 transitions. Word has length 45 [2021-12-22 00:03:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:29,985 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1692 transitions. [2021-12-22 00:03:29,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 00:03:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1692 transitions. [2021-12-22 00:03:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:29,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:29,987 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 00:03:29,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-22 00:03:29,987 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1990296656, now seen corresponding path program 1 times [2021-12-22 00:03:29,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:29,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658916546] [2021-12-22 00:03:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:29,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:30,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:30,490 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 00:03:30,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:30,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658916546] [2021-12-22 00:03:30,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658916546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:30,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:30,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 00:03:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463659960] [2021-12-22 00:03:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 00:03:30,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 00:03:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:03:30,492 INFO L87 Difference]: Start difference. First operand 1274 states and 1692 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 00:03:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:31,338 INFO L93 Difference]: Finished difference Result 1907 states and 2495 transitions. [2021-12-22 00:03:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 00:03:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 00:03:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:31,341 INFO L225 Difference]: With dead ends: 1907 [2021-12-22 00:03:31,341 INFO L226 Difference]: Without dead ends: 1907 [2021-12-22 00:03:31,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-12-22 00:03:31,342 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 1174 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:31,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 1520 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-12-22 00:03:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1457. [2021-12-22 00:03:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1327 states have (on average 1.345139412207988) internal successors, (1785), 1362 states have internal predecessors, (1785), 59 states have call successors, (59), 22 states have call predecessors, (59), 44 states have return successors, (118), 72 states have call predecessors, (118), 59 states have call successors, (118) [2021-12-22 00:03:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1962 transitions. [2021-12-22 00:03:31,357 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1962 transitions. Word has length 45 [2021-12-22 00:03:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:31,357 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 1962 transitions. [2021-12-22 00:03:31,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 00:03:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1962 transitions. [2021-12-22 00:03:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:31,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:31,358 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 00:03:31,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-22 00:03:31,358 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1988449613, now seen corresponding path program 1 times [2021-12-22 00:03:31,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:31,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076705393] [2021-12-22 00:03:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:31,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:31,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:31,601 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 00:03:31,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:31,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076705393] [2021-12-22 00:03:31,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076705393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:31,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:31,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 00:03:31,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256633664] [2021-12-22 00:03:31,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:31,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 00:03:31,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 00:03:31,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:03:31,602 INFO L87 Difference]: Start difference. First operand 1457 states and 1962 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 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 00:03:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:32,375 INFO L93 Difference]: Finished difference Result 2062 states and 2751 transitions. [2021-12-22 00:03:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 00:03:32,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 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 00:03:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:32,378 INFO L225 Difference]: With dead ends: 2062 [2021-12-22 00:03:32,378 INFO L226 Difference]: Without dead ends: 2062 [2021-12-22 00:03:32,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2021-12-22 00:03:32,379 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 718 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:32,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 1150 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-12-22 00:03:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1711. [2021-12-22 00:03:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1554 states have (on average 1.3404118404118404) internal successors, (2083), 1598 states have internal predecessors, (2083), 74 states have call successors, (74), 28 states have call predecessors, (74), 56 states have return successors, (148), 84 states have call predecessors, (148), 74 states have call successors, (148) [2021-12-22 00:03:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2305 transitions. [2021-12-22 00:03:32,400 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2305 transitions. Word has length 45 [2021-12-22 00:03:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:32,400 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2305 transitions. [2021-12-22 00:03:32,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 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 00:03:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2305 transitions. [2021-12-22 00:03:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:03:32,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:32,401 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 00:03:32,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-22 00:03:32,402 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1988449614, now seen corresponding path program 1 times [2021-12-22 00:03:32,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:32,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084402376] [2021-12-22 00:03:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:32,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:32,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:32,704 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 00:03:32,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:32,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084402376] [2021-12-22 00:03:32,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084402376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:32,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:32,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 00:03:32,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693895147] [2021-12-22 00:03:32,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:32,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:32,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:32,705 INFO L87 Difference]: Start difference. First operand 1711 states and 2305 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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 00:03:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:33,250 INFO L93 Difference]: Finished difference Result 2105 states and 2787 transitions. [2021-12-22 00:03:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 00:03:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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 00:03:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:33,253 INFO L225 Difference]: With dead ends: 2105 [2021-12-22 00:03:33,253 INFO L226 Difference]: Without dead ends: 2105 [2021-12-22 00:03:33,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-12-22 00:03:33,253 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 676 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:33,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 774 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-12-22 00:03:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1887. [2021-12-22 00:03:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1714 states have (on average 1.352975495915986) internal successors, (2319), 1762 states have internal predecessors, (2319), 82 states have call successors, (82), 32 states have call predecessors, (82), 64 states have return successors, (164), 92 states have call predecessors, (164), 82 states have call successors, (164) [2021-12-22 00:03:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2565 transitions. [2021-12-22 00:03:33,273 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2565 transitions. Word has length 45 [2021-12-22 00:03:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:33,273 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2565 transitions. [2021-12-22 00:03:33,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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 00:03:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2565 transitions. [2021-12-22 00:03:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 00:03:33,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:33,274 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] [2021-12-22 00:03:33,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-22 00:03:33,274 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1569652866, now seen corresponding path program 1 times [2021-12-22 00:03:33,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213400693] [2021-12-22 00:03:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:33,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:33,514 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 00:03:33,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213400693] [2021-12-22 00:03:33,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213400693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:33,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:33,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 00:03:33,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235143689] [2021-12-22 00:03:33,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:33,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:33,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:33,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:33,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:03:33,516 INFO L87 Difference]: Start difference. First operand 1887 states and 2565 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 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 00:03:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:34,270 INFO L93 Difference]: Finished difference Result 3140 states and 4148 transitions. [2021-12-22 00:03:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 00:03:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 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 46 [2021-12-22 00:03:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:34,274 INFO L225 Difference]: With dead ends: 3140 [2021-12-22 00:03:34,274 INFO L226 Difference]: Without dead ends: 3140 [2021-12-22 00:03:34,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 00:03:34,274 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 857 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:34,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1866 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:03:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-12-22 00:03:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2531. [2021-12-22 00:03:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2272 states have (on average 1.357394366197183) internal successors, (3084), 2353 states have internal predecessors, (3084), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-22 00:03:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 3450 transitions. [2021-12-22 00:03:34,315 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 3450 transitions. Word has length 46 [2021-12-22 00:03:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:34,315 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 3450 transitions. [2021-12-22 00:03:34,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 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 00:03:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 3450 transitions. [2021-12-22 00:03:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 00:03:34,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:34,316 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] [2021-12-22 00:03:34,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-22 00:03:34,316 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1512394564, now seen corresponding path program 1 times [2021-12-22 00:03:34,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:34,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119319621] [2021-12-22 00:03:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:34,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:34,329 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 00:03:34,586 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 00:03:34,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119319621] [2021-12-22 00:03:34,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119319621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:34,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:34,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 00:03:34,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226011995] [2021-12-22 00:03:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:34,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 00:03:34,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 00:03:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:03:34,588 INFO L87 Difference]: Start difference. First operand 2531 states and 3450 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 00:03:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:35,138 INFO L93 Difference]: Finished difference Result 2750 states and 3673 transitions. [2021-12-22 00:03:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 00:03:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 46 [2021-12-22 00:03:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:35,142 INFO L225 Difference]: With dead ends: 2750 [2021-12-22 00:03:35,142 INFO L226 Difference]: Without dead ends: 2750 [2021-12-22 00:03:35,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2021-12-22 00:03:35,142 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 771 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:35,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1063 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:03:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-12-22 00:03:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2529. [2021-12-22 00:03:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2270 states have (on average 1.3572687224669604) internal successors, (3081), 2351 states have internal predecessors, (3081), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-22 00:03:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 3447 transitions. [2021-12-22 00:03:35,170 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 3447 transitions. Word has length 46 [2021-12-22 00:03:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:35,171 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 3447 transitions. [2021-12-22 00:03:35,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 00:03:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 3447 transitions. [2021-12-22 00:03:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 00:03:35,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:35,172 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] [2021-12-22 00:03:35,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-22 00:03:35,172 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:35,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1829142158, now seen corresponding path program 1 times [2021-12-22 00:03:35,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:35,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858030110] [2021-12-22 00:03:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:35,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:35,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:35,373 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 00:03:35,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:35,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858030110] [2021-12-22 00:03:35,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858030110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:35,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86105447] [2021-12-22 00:03:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:35,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:35,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:35,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 00:03:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:35,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 00:03:35,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:35,803 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 00:03:35,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:35,950 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 23 treesize of output 7 [2021-12-22 00:03:35,966 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 00:03:35,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:35,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86105447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:35,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:35,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-12-22 00:03:35,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756958926] [2021-12-22 00:03:35,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:35,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:03:35,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:03:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:03:35,967 INFO L87 Difference]: Start difference. First operand 2529 states and 3447 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 00:03:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:36,198 INFO L93 Difference]: Finished difference Result 2613 states and 3524 transitions. [2021-12-22 00:03:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:03:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 47 [2021-12-22 00:03:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:36,201 INFO L225 Difference]: With dead ends: 2613 [2021-12-22 00:03:36,202 INFO L226 Difference]: Without dead ends: 2613 [2021-12-22 00:03:36,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-22 00:03:36,202 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 447 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:36,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1087 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 263 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-12-22 00:03:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-12-22 00:03:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2540. [2021-12-22 00:03:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2281 states have (on average 1.356422621657168) internal successors, (3094), 2362 states have internal predecessors, (3094), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-22 00:03:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 3460 transitions. [2021-12-22 00:03:36,228 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 3460 transitions. Word has length 47 [2021-12-22 00:03:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:36,228 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 3460 transitions. [2021-12-22 00:03:36,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 00:03:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 3460 transitions. [2021-12-22 00:03:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 00:03:36,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:36,229 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] [2021-12-22 00:03:36,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:36,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-22 00:03:36,458 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:36,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1656478512, now seen corresponding path program 1 times [2021-12-22 00:03:36,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:36,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114591453] [2021-12-22 00:03:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:36,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:36,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:36,801 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 00:03:36,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114591453] [2021-12-22 00:03:36,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114591453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595236109] [2021-12-22 00:03:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:36,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:36,802 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:36,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 00:03:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 00:03:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:37,283 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 00:03:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:37,361 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 27 treesize of output 26 [2021-12-22 00:03:37,458 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 19 treesize of output 7 [2021-12-22 00:03:37,475 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 00:03:37,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:03:37,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595236109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:37,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:03:37,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 25 [2021-12-22 00:03:37,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429435865] [2021-12-22 00:03:37,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:37,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 00:03:37,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 00:03:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-22 00:03:37,476 INFO L87 Difference]: Start difference. First operand 2540 states and 3460 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 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 00:03:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:38,172 INFO L93 Difference]: Finished difference Result 2995 states and 4001 transitions. [2021-12-22 00:03:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 00:03:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 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 47 [2021-12-22 00:03:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:38,176 INFO L225 Difference]: With dead ends: 2995 [2021-12-22 00:03:38,176 INFO L226 Difference]: Without dead ends: 2995 [2021-12-22 00:03:38,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 00:03:38,177 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 1299 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:38,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1303 Valid, 1275 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-12-22 00:03:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2547. [2021-12-22 00:03:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2288 states have (on average 1.3566433566433567) internal successors, (3104), 2369 states have internal predecessors, (3104), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-22 00:03:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 3470 transitions. [2021-12-22 00:03:38,206 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 3470 transitions. Word has length 47 [2021-12-22 00:03:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:38,206 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 3470 transitions. [2021-12-22 00:03:38,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 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 00:03:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 3470 transitions. [2021-12-22 00:03:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 00:03:38,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:38,207 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] [2021-12-22 00:03:38,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:38,425 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1323444049, now seen corresponding path program 1 times [2021-12-22 00:03:38,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511900725] [2021-12-22 00:03:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:38,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 00:03:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:38,477 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 00:03:38,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511900725] [2021-12-22 00:03:38,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511900725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:38,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:38,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:03:38,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436116783] [2021-12-22 00:03:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:38,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:03:38,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:03:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:03:38,478 INFO L87 Difference]: Start difference. First operand 2547 states and 3470 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 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 00:03:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:38,501 INFO L93 Difference]: Finished difference Result 2797 states and 3782 transitions. [2021-12-22 00:03:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:03:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 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 48 [2021-12-22 00:03:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:38,504 INFO L225 Difference]: With dead ends: 2797 [2021-12-22 00:03:38,504 INFO L226 Difference]: Without dead ends: 2797 [2021-12-22 00:03:38,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:03:38,505 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 215 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:38,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 315 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:03:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-12-22 00:03:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2546. [2021-12-22 00:03:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2288 states have (on average 1.347027972027972) internal successors, (3082), 2368 states have internal predecessors, (3082), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-22 00:03:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3448 transitions. [2021-12-22 00:03:38,528 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3448 transitions. Word has length 48 [2021-12-22 00:03:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:38,528 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3448 transitions. [2021-12-22 00:03:38,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 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 00:03:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3448 transitions. [2021-12-22 00:03:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 00:03:38,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:38,529 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] [2021-12-22 00:03:38,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-22 00:03:38,530 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1922907279, now seen corresponding path program 1 times [2021-12-22 00:03:38,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:38,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194814843] [2021-12-22 00:03:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:38,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:39,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:39,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 00:03:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:39,302 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 00:03:39,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:39,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194814843] [2021-12-22 00:03:39,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194814843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:39,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:39,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-22 00:03:39,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874480755] [2021-12-22 00:03:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:39,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 00:03:39,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 00:03:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:03:39,307 INFO L87 Difference]: Start difference. First operand 2546 states and 3448 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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 00:03:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:41,822 INFO L93 Difference]: Finished difference Result 3637 states and 4792 transitions. [2021-12-22 00:03:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-22 00:03:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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 49 [2021-12-22 00:03:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:41,828 INFO L225 Difference]: With dead ends: 3637 [2021-12-22 00:03:41,828 INFO L226 Difference]: Without dead ends: 3635 [2021-12-22 00:03:41,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=889, Invalid=2651, Unknown=0, NotChecked=0, Total=3540 [2021-12-22 00:03:41,828 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 2422 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:41,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 2391 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 00:03:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-12-22 00:03:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 2511. [2021-12-22 00:03:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2255 states have (on average 1.3432372505543237) internal successors, (3029), 2335 states have internal predecessors, (3029), 120 states have call successors, (120), 55 states have call predecessors, (120), 110 states have return successors, (240), 120 states have call predecessors, (240), 120 states have call successors, (240) [2021-12-22 00:03:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 3389 transitions. [2021-12-22 00:03:41,858 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 3389 transitions. Word has length 49 [2021-12-22 00:03:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:41,859 INFO L470 AbstractCegarLoop]: Abstraction has 2511 states and 3389 transitions. [2021-12-22 00:03:41,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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 00:03:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 3389 transitions. [2021-12-22 00:03:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 00:03:41,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:41,859 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 00:03:41,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-22 00:03:41,860 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash 904339398, now seen corresponding path program 1 times [2021-12-22 00:03:41,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072811875] [2021-12-22 00:03:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:41,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:42,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:42,327 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 00:03:42,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:42,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072811875] [2021-12-22 00:03:42,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072811875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:42,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:42,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-22 00:03:42,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327899321] [2021-12-22 00:03:42,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:42,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 00:03:42,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 00:03:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:03:42,328 INFO L87 Difference]: Start difference. First operand 2511 states and 3389 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 00:03:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:43,432 INFO L93 Difference]: Finished difference Result 2965 states and 3925 transitions. [2021-12-22 00:03:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 00:03:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 00:03:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:43,437 INFO L225 Difference]: With dead ends: 2965 [2021-12-22 00:03:43,437 INFO L226 Difference]: Without dead ends: 2965 [2021-12-22 00:03:43,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 00:03:43,438 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 1090 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:43,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 1992 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:03:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-22 00:03:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2507. [2021-12-22 00:03:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2251 states have (on average 1.3429586850288762) internal successors, (3023), 2331 states have internal predecessors, (3023), 120 states have call successors, (120), 55 states have call predecessors, (120), 110 states have return successors, (240), 120 states have call predecessors, (240), 120 states have call successors, (240) [2021-12-22 00:03:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 3383 transitions. [2021-12-22 00:03:43,466 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 3383 transitions. Word has length 48 [2021-12-22 00:03:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:43,466 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 3383 transitions. [2021-12-22 00:03:43,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 00:03:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 3383 transitions. [2021-12-22 00:03:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 00:03:43,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:43,467 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 00:03:43,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-22 00:03:43,467 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1713686024, now seen corresponding path program 1 times [2021-12-22 00:03:43,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:43,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98453472] [2021-12-22 00:03:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:43,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:43,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:43,706 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 00:03:43,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:43,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98453472] [2021-12-22 00:03:43,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98453472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:03:43,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:03:43,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 00:03:43,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10975990] [2021-12-22 00:03:43,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:03:43,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 00:03:43,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 00:03:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:03:43,707 INFO L87 Difference]: Start difference. First operand 2507 states and 3383 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 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 00:03:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:44,485 INFO L93 Difference]: Finished difference Result 2713 states and 3592 transitions. [2021-12-22 00:03:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:03:44,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 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 00:03:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:44,489 INFO L225 Difference]: With dead ends: 2713 [2021-12-22 00:03:44,489 INFO L226 Difference]: Without dead ends: 2713 [2021-12-22 00:03:44,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2021-12-22 00:03:44,489 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 668 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:44,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 974 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:03:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-22 00:03:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2494. [2021-12-22 00:03:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2238 states have (on average 1.3436103663985701) internal successors, (3007), 2318 states have internal predecessors, (3007), 120 states have call successors, (120), 55 states have call predecessors, (120), 110 states have return successors, (240), 120 states have call predecessors, (240), 120 states have call successors, (240) [2021-12-22 00:03:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3367 transitions. [2021-12-22 00:03:44,513 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3367 transitions. Word has length 48 [2021-12-22 00:03:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:44,513 INFO L470 AbstractCegarLoop]: Abstraction has 2494 states and 3367 transitions. [2021-12-22 00:03:44,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 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 00:03:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3367 transitions. [2021-12-22 00:03:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 00:03:44,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:44,514 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:44,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-22 00:03:44,514 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1600129367, now seen corresponding path program 1 times [2021-12-22 00:03:44,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:44,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054205753] [2021-12-22 00:03:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:44,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:45,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:45,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 00:03:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:03:45,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:45,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054205753] [2021-12-22 00:03:45,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054205753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:45,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660004020] [2021-12-22 00:03:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:45,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:45,316 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:45,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 00:03:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 00:03:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:45,779 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 00:03:45,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:45,819 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 30 treesize of output 23 [2021-12-22 00:03:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:46,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:46,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:46,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2021-12-22 00:03:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:46,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:46,621 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 112 treesize of output 106 [2021-12-22 00:03:46,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:46,639 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 88 treesize of output 82 [2021-12-22 00:03:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:03:47,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660004020] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:03:47,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:03:47,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 19] total 52 [2021-12-22 00:03:47,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779893194] [2021-12-22 00:03:47,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:47,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-22 00:03:47,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-22 00:03:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2471, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 00:03:47,239 INFO L87 Difference]: Start difference. First operand 2494 states and 3367 transitions. Second operand has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 00:03:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:03:53,205 INFO L93 Difference]: Finished difference Result 5153 states and 6862 transitions. [2021-12-22 00:03:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-22 00:03:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-12-22 00:03:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:03:53,211 INFO L225 Difference]: With dead ends: 5153 [2021-12-22 00:03:53,211 INFO L226 Difference]: Without dead ends: 5149 [2021-12-22 00:03:53,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2173, Invalid=9817, Unknown=0, NotChecked=0, Total=11990 [2021-12-22 00:03:53,214 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 5297 mSDsluCounter, 8309 mSDsCounter, 0 mSdLazyCounter, 4370 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5297 SdHoareTripleChecker+Valid, 8676 SdHoareTripleChecker+Invalid, 4902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 4370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 00:03:53,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5297 Valid, 8676 Invalid, 4902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 4370 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 00:03:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2021-12-22 00:03:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 2167. [2021-12-22 00:03:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 1951 states have (on average 1.3305996924654024) internal successors, (2596), 2015 states have internal predecessors, (2596), 100 states have call successors, (100), 45 states have call predecessors, (100), 90 states have return successors, (200), 106 states have call predecessors, (200), 100 states have call successors, (200) [2021-12-22 00:03:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 2896 transitions. [2021-12-22 00:03:53,260 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 2896 transitions. Word has length 50 [2021-12-22 00:03:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:03:53,260 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 2896 transitions. [2021-12-22 00:03:53,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 00:03:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 2896 transitions. [2021-12-22 00:03:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 00:03:53,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:03:53,262 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 00:03:53,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 00:03:53,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-22 00:03:53,475 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-22 00:03:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:03:53,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1724221356, now seen corresponding path program 1 times [2021-12-22 00:03:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:03:53,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234335416] [2021-12-22 00:03:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:53,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:03:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:53,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 00:03:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:53,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:03:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234335416] [2021-12-22 00:03:53,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234335416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87624997] [2021-12-22 00:03:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:03:53,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:03:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:03:53,996 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:03:54,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 00:03:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:03:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-22 00:03:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:03:54,248 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:03:54,248 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 00:03:54,330 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 00:03:54,349 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 00:03:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:54,396 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 21 treesize of output 20 [2021-12-22 00:03:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:54,400 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 21 treesize of output 20 [2021-12-22 00:03:54,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:54,574 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 16 treesize of output 18 [2021-12-22 00:03:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:54,580 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 16 treesize of output 18 [2021-12-22 00:03:54,699 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 25 treesize of output 24 [2021-12-22 00:03:54,703 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 24 treesize of output 26 [2021-12-22 00:03:55,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:03:55,111 INFO L353 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2021-12-22 00:03:55,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2021-12-22 00:03:55,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:55,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-22 00:03:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:03:55,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:03:55,316 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1436 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1436) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_append_one_~item~1#1.base|)) |c_~#list~0.base|) (+ |c_~#list~0.offset| 4))) 0) 0)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_append_one_~item~1#1.base|)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) (+ |c_~#list~0.offset| 4)))) 0) 0)) is different from false [2021-12-22 00:03:55,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:55,393 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-12-22 00:03:55,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:55,404 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2021-12-22 00:03:55,790 INFO L353 Elim1Store]: treesize reduction 26, result has 53.6 percent of original size [2021-12-22 00:03:55,790 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 66 [2021-12-22 00:03:55,805 INFO L353 Elim1Store]: treesize reduction 26, result has 53.6 percent of original size [2021-12-22 00:03:55,806 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 49 [2021-12-22 00:03:55,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:55,814 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 62 [2021-12-22 00:03:55,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:55,834 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 111 [2021-12-22 00:03:55,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:03:55,844 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 72 treesize of output 64 [2021-12-22 00:03:55,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 46 treesize of output 42 [2021-12-22 00:03:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:03:56,686 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2021-12-22 00:03:56,687 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 1 [2021-12-22 00:03:57,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87624997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:03:57,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:03:57,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-12-22 00:03:57,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273637474] [2021-12-22 00:03:57,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:03:57,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 00:03:57,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:03:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 00:03:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2003, Unknown=15, NotChecked=90, Total=2256 [2021-12-22 00:03:57,207 INFO L87 Difference]: Start difference. First operand 2167 states and 2896 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 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)