/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:16:31,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:16:31,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:16:31,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:16:31,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:16:31,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:16:31,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:16:31,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:16:31,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:16:31,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:16:31,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:16:31,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:16:31,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:16:31,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:16:31,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:16:31,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:16:31,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:16:31,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:16:31,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:16:31,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:16:31,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:16:31,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:16:31,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:16:31,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:16:31,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:16:31,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:16:31,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:16:31,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:16:31,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:16:31,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:16:31,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:16:31,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:16:31,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:16:31,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:16:31,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:16:31,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:16:31,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:16:31,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:16:31,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:16:31,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:16:31,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:16:31,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 06:16:31,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:16:31,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:16:31,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:16:31,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:16:31,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:16:31,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:16:31,468 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:16:31,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:16:31,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:16:31,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:16:31,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:16:31,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:16:31,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:16:31,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:16:31,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:16:31,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:16:31,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:16:31,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:16:31,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:16:31,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:16:31,471 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:16:31,471 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:16:31,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:16:31,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:16:31,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:16:31,472 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:16:31,472 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:16:31,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:16:31,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:16:31,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:16:31,629 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:16:31,629 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:16:31,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-01-11 06:16:31,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2618bdae/c8bbbc9a498944d991e24c7dc1b1fc06/FLAG672880da1 [2022-01-11 06:16:32,071 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:16:32,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-01-11 06:16:32,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2618bdae/c8bbbc9a498944d991e24c7dc1b1fc06/FLAG672880da1 [2022-01-11 06:16:32,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2618bdae/c8bbbc9a498944d991e24c7dc1b1fc06 [2022-01-11 06:16:32,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:16:32,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:16:32,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:16:32,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:16:32,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:16:32,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe05641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32, skipping insertion in model container [2022-01-11 06:16:32,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:16:32,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:16:32,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2022-01-11 06:16:32,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:16:32,749 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:16:32,810 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2022-01-11 06:16:32,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:16:32,820 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:16:32,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32 WrapperNode [2022-01-11 06:16:32,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:16:32,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:16:32,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:16:32,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:16:32,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,862 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 445 [2022-01-11 06:16:32,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:16:32,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:16:32,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:16:32,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:16:32,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:16:32,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:16:32,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:16:32,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:16:32,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (1/1) ... [2022-01-11 06:16:32,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:16:32,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:16:32,923 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) [2022-01-11 06:16:32,924 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 [2022-01-11 06:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:16:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:16:32,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:16:33,013 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:16:33,014 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:16:33,333 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:16:33,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:16:33,339 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-11 06:16:33,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:16:33 BoogieIcfgContainer [2022-01-11 06:16:33,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:16:33,341 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:16:33,341 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:16:33,341 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:16:33,343 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:16:33" (1/1) ... [2022-01-11 06:16:33,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:16:33 BasicIcfg [2022-01-11 06:16:33,578 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:16:33,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:16:33,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:16:33,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:16:33,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:16:32" (1/4) ... [2022-01-11 06:16:33,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b529116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:16:33, skipping insertion in model container [2022-01-11 06:16:33,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:16:32" (2/4) ... [2022-01-11 06:16:33,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b529116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:16:33, skipping insertion in model container [2022-01-11 06:16:33,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:16:33" (3/4) ... [2022-01-11 06:16:33,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b529116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 06:16:33, skipping insertion in model container [2022-01-11 06:16:33,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:16:33" (4/4) ... [2022-01-11 06:16:33,586 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.cTransformedIcfg [2022-01-11 06:16:33,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:16:33,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:16:33,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:16:33,633 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 06:16:33,633 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:16:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 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) [2022-01-11 06:16:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-11 06:16:33,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:33,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:33,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:33,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2109123515, now seen corresponding path program 1 times [2022-01-11 06:16:33,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:33,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399964225] [2022-01-11 06:16:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:33,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:33,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:33,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399964225] [2022-01-11 06:16:33,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399964225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:33,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:33,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 06:16:33,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771695073] [2022-01-11 06:16:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:33,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 06:16:33,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 06:16:33,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 06:16:33,980 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-01-11 06:16:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:34,010 INFO L93 Difference]: Finished difference Result 221 states and 376 transitions. [2022-01-11 06:16:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 06:16:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2022-01-11 06:16:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:34,022 INFO L225 Difference]: With dead ends: 221 [2022-01-11 06:16:34,022 INFO L226 Difference]: Without dead ends: 133 [2022-01-11 06:16:34,026 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 [2022-01-11 06:16:34,029 INFO L933 BasicCegarLoop]: 233 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, 233 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 [2022-01-11 06:16:34,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-11 06:16:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-01-11 06:16:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 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) [2022-01-11 06:16:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2022-01-11 06:16:34,068 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2022-01-11 06:16:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:34,068 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2022-01-11 06:16:34,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-01-11 06:16:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2022-01-11 06:16:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-11 06:16:34,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:34,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:34,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:16:34,073 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1777019556, now seen corresponding path program 1 times [2022-01-11 06:16:34,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406379177] [2022-01-11 06:16:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:34,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:34,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406379177] [2022-01-11 06:16:34,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406379177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:34,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:34,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:34,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6803922] [2022-01-11 06:16:34,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:34,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:34,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:34,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:34,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:34,266 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2022-01-11 06:16:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:34,353 INFO L93 Difference]: Finished difference Result 295 states and 499 transitions. [2022-01-11 06:16:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 06:16:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2022-01-11 06:16:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:34,372 INFO L225 Difference]: With dead ends: 295 [2022-01-11 06:16:34,372 INFO L226 Difference]: Without dead ends: 212 [2022-01-11 06:16:34,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-11 06:16:34,376 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 135 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:34,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 871 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:16:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-11 06:16:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2022-01-11 06:16:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.553030303030303) internal successors, (205), 132 states have internal predecessors, (205), 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) [2022-01-11 06:16:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 205 transitions. [2022-01-11 06:16:34,382 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 205 transitions. Word has length 37 [2022-01-11 06:16:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:34,382 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 205 transitions. [2022-01-11 06:16:34,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2022-01-11 06:16:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 205 transitions. [2022-01-11 06:16:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-11 06:16:34,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:34,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:34,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 06:16:34,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1261115107, now seen corresponding path program 1 times [2022-01-11 06:16:34,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:34,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388306404] [2022-01-11 06:16:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:34,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:34,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:34,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388306404] [2022-01-11 06:16:34,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388306404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:34,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:34,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:34,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985997965] [2022-01-11 06:16:34,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:34,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:34,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:34,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:34,583 INFO L87 Difference]: Start difference. First operand 133 states and 205 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:36,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 06:16:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:36,751 INFO L93 Difference]: Finished difference Result 281 states and 453 transitions. [2022-01-11 06:16:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-11 06:16:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:36,752 INFO L225 Difference]: With dead ends: 281 [2022-01-11 06:16:36,752 INFO L226 Difference]: Without dead ends: 202 [2022-01-11 06:16:36,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:36,754 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:36,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 372 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-11 06:16:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-11 06:16:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-01-11 06:16:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.5778894472361809) internal successors, (314), 199 states have internal predecessors, (314), 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) [2022-01-11 06:16:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 314 transitions. [2022-01-11 06:16:36,764 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 314 transitions. Word has length 60 [2022-01-11 06:16:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:36,765 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 314 transitions. [2022-01-11 06:16:36,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 314 transitions. [2022-01-11 06:16:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-11 06:16:36,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:36,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:36,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 06:16:36,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:36,767 INFO L85 PathProgramCache]: Analyzing trace with hash -332480326, now seen corresponding path program 1 times [2022-01-11 06:16:36,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:36,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905154653] [2022-01-11 06:16:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:36,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:36,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905154653] [2022-01-11 06:16:36,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905154653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:36,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:36,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 06:16:36,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29079791] [2022-01-11 06:16:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:36,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 06:16:36,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 06:16:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 06:16:36,926 INFO L87 Difference]: Start difference. First operand 200 states and 314 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:36,986 INFO L93 Difference]: Finished difference Result 561 states and 875 transitions. [2022-01-11 06:16:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-11 06:16:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:36,989 INFO L225 Difference]: With dead ends: 561 [2022-01-11 06:16:36,989 INFO L226 Difference]: Without dead ends: 386 [2022-01-11 06:16:36,993 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 [2022-01-11 06:16:37,000 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 530 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:37,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 389 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-11 06:16:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2022-01-11 06:16:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.5613577023498695) internal successors, (598), 383 states have internal predecessors, (598), 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) [2022-01-11 06:16:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 598 transitions. [2022-01-11 06:16:37,033 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 598 transitions. Word has length 62 [2022-01-11 06:16:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:37,033 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 598 transitions. [2022-01-11 06:16:37,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,033 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 598 transitions. [2022-01-11 06:16:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-11 06:16:37,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:37,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:37,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 06:16:37,036 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash -466769154, now seen corresponding path program 1 times [2022-01-11 06:16:37,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:37,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503278807] [2022-01-11 06:16:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:37,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:37,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:37,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503278807] [2022-01-11 06:16:37,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503278807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:37,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:37,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:37,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302238529] [2022-01-11 06:16:37,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:37,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:37,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:37,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:37,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:37,157 INFO L87 Difference]: Start difference. First operand 384 states and 598 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:37,180 INFO L93 Difference]: Finished difference Result 659 states and 1060 transitions. [2022-01-11 06:16:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-11 06:16:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:37,183 INFO L225 Difference]: With dead ends: 659 [2022-01-11 06:16:37,183 INFO L226 Difference]: Without dead ends: 507 [2022-01-11 06:16:37,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:37,186 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 116 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:37,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 468 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-11 06:16:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2022-01-11 06:16:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.5853174603174602) internal successors, (799), 504 states have internal predecessors, (799), 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) [2022-01-11 06:16:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 799 transitions. [2022-01-11 06:16:37,207 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 799 transitions. Word has length 63 [2022-01-11 06:16:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:37,209 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 799 transitions. [2022-01-11 06:16:37,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 799 transitions. [2022-01-11 06:16:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-11 06:16:37,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:37,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:37,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-11 06:16:37,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash -786904181, now seen corresponding path program 1 times [2022-01-11 06:16:37,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060230116] [2022-01-11 06:16:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:37,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:37,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:37,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060230116] [2022-01-11 06:16:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060230116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:37,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:37,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:37,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747125776] [2022-01-11 06:16:37,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:37,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:37,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:37,274 INFO L87 Difference]: Start difference. First operand 505 states and 799 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:37,300 INFO L93 Difference]: Finished difference Result 1044 states and 1698 transitions. [2022-01-11 06:16:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:37,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-11 06:16:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:37,302 INFO L225 Difference]: With dead ends: 1044 [2022-01-11 06:16:37,302 INFO L226 Difference]: Without dead ends: 645 [2022-01-11 06:16:37,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:37,303 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 121 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:37,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 397 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-11 06:16:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 633. [2022-01-11 06:16:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.5996835443037976) internal successors, (1011), 632 states have internal predecessors, (1011), 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) [2022-01-11 06:16:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1011 transitions. [2022-01-11 06:16:37,321 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1011 transitions. Word has length 63 [2022-01-11 06:16:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:37,321 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1011 transitions. [2022-01-11 06:16:37,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1011 transitions. [2022-01-11 06:16:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-11 06:16:37,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:37,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:37,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-11 06:16:37,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1746618253, now seen corresponding path program 1 times [2022-01-11 06:16:37,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:37,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613471124] [2022-01-11 06:16:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:37,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:37,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613471124] [2022-01-11 06:16:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613471124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:37,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:37,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:37,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853624573] [2022-01-11 06:16:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:37,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:37,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:37,417 INFO L87 Difference]: Start difference. First operand 633 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:37,445 INFO L93 Difference]: Finished difference Result 1861 states and 2969 transitions. [2022-01-11 06:16:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-11 06:16:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:37,449 INFO L225 Difference]: With dead ends: 1861 [2022-01-11 06:16:37,449 INFO L226 Difference]: Without dead ends: 1256 [2022-01-11 06:16:37,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:37,450 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 194 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:37,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 592 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-01-11 06:16:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 635. [2022-01-11 06:16:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.5977917981072556) internal successors, (1013), 634 states have internal predecessors, (1013), 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) [2022-01-11 06:16:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1013 transitions. [2022-01-11 06:16:37,467 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1013 transitions. Word has length 63 [2022-01-11 06:16:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:37,467 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1013 transitions. [2022-01-11 06:16:37,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1013 transitions. [2022-01-11 06:16:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-11 06:16:37,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:37,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:37,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-11 06:16:37,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash 907509, now seen corresponding path program 1 times [2022-01-11 06:16:37,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:37,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034483168] [2022-01-11 06:16:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:37,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:37,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034483168] [2022-01-11 06:16:37,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034483168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:37,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:37,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:37,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297062353] [2022-01-11 06:16:37,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:37,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:37,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:37,548 INFO L87 Difference]: Start difference. First operand 635 states and 1013 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:37,601 INFO L93 Difference]: Finished difference Result 1796 states and 2859 transitions. [2022-01-11 06:16:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-11 06:16:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:37,605 INFO L225 Difference]: With dead ends: 1796 [2022-01-11 06:16:37,605 INFO L226 Difference]: Without dead ends: 1173 [2022-01-11 06:16:37,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:37,606 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 603 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:37,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 493 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-01-11 06:16:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1171. [2022-01-11 06:16:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 1.5777777777777777) internal successors, (1846), 1170 states have internal predecessors, (1846), 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) [2022-01-11 06:16:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1846 transitions. [2022-01-11 06:16:37,641 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1846 transitions. Word has length 64 [2022-01-11 06:16:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:37,642 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 1846 transitions. [2022-01-11 06:16:37,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1846 transitions. [2022-01-11 06:16:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-11 06:16:37,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:37,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:37,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-11 06:16:37,643 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash 752238169, now seen corresponding path program 1 times [2022-01-11 06:16:37,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:37,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002502867] [2022-01-11 06:16:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:37,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:37,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:37,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002502867] [2022-01-11 06:16:37,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002502867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:37,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:37,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:37,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929379099] [2022-01-11 06:16:37,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:37,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:37,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:37,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:37,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:37,789 INFO L87 Difference]: Start difference. First operand 1171 states and 1846 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:39,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 06:16:42,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 06:16:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:42,215 INFO L93 Difference]: Finished difference Result 2996 states and 4844 transitions. [2022-01-11 06:16:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-11 06:16:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:42,223 INFO L225 Difference]: With dead ends: 2996 [2022-01-11 06:16:42,223 INFO L226 Difference]: Without dead ends: 2027 [2022-01-11 06:16:42,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:42,224 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:42,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 391 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-01-11 06:16:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-01-11 06:16:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2025. [2022-01-11 06:16:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 1.5983201581027668) internal successors, (3235), 2024 states have internal predecessors, (3235), 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) [2022-01-11 06:16:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 3235 transitions. [2022-01-11 06:16:42,290 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 3235 transitions. Word has length 64 [2022-01-11 06:16:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:42,290 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 3235 transitions. [2022-01-11 06:16:42,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 3235 transitions. [2022-01-11 06:16:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-11 06:16:42,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:42,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:42,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-11 06:16:42,292 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1245698448, now seen corresponding path program 1 times [2022-01-11 06:16:42,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209872246] [2022-01-11 06:16:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:42,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:42,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:42,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209872246] [2022-01-11 06:16:42,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209872246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:42,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:42,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 06:16:42,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430183034] [2022-01-11 06:16:42,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:42,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 06:16:42,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 06:16:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 06:16:42,382 INFO L87 Difference]: Start difference. First operand 2025 states and 3235 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:42,576 INFO L93 Difference]: Finished difference Result 5881 states and 9381 transitions. [2022-01-11 06:16:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-11 06:16:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:42,589 INFO L225 Difference]: With dead ends: 5881 [2022-01-11 06:16:42,589 INFO L226 Difference]: Without dead ends: 3918 [2022-01-11 06:16:42,592 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 [2022-01-11 06:16:42,592 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 494 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:42,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 389 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2022-01-11 06:16:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3916. [2022-01-11 06:16:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 1.5851851851851853) internal successors, (6206), 3915 states have internal predecessors, (6206), 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) [2022-01-11 06:16:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 6206 transitions. [2022-01-11 06:16:42,792 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 6206 transitions. Word has length 66 [2022-01-11 06:16:42,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:42,792 INFO L470 AbstractCegarLoop]: Abstraction has 3916 states and 6206 transitions. [2022-01-11 06:16:42,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 6206 transitions. [2022-01-11 06:16:42,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-11 06:16:42,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:42,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:42,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-11 06:16:42,794 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:42,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1096727798, now seen corresponding path program 1 times [2022-01-11 06:16:42,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:42,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783697704] [2022-01-11 06:16:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:42,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:42,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:42,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783697704] [2022-01-11 06:16:42,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783697704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:42,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:42,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:42,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962794262] [2022-01-11 06:16:42,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:42,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:42,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:42,856 INFO L87 Difference]: Start difference. First operand 3916 states and 6206 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:43,044 INFO L93 Difference]: Finished difference Result 7281 states and 11672 transitions. [2022-01-11 06:16:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-11 06:16:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:43,058 INFO L225 Difference]: With dead ends: 7281 [2022-01-11 06:16:43,058 INFO L226 Difference]: Without dead ends: 5394 [2022-01-11 06:16:43,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:43,061 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:43,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 461 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2022-01-11 06:16:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 5392. [2022-01-11 06:16:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 1.5859766277128549) internal successors, (8550), 5391 states have internal predecessors, (8550), 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) [2022-01-11 06:16:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 8550 transitions. [2022-01-11 06:16:43,247 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 8550 transitions. Word has length 67 [2022-01-11 06:16:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:43,247 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 8550 transitions. [2022-01-11 06:16:43,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 8550 transitions. [2022-01-11 06:16:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-11 06:16:43,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:43,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:43,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-11 06:16:43,249 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash 136622615, now seen corresponding path program 1 times [2022-01-11 06:16:43,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:43,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643588356] [2022-01-11 06:16:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:43,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:43,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:43,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643588356] [2022-01-11 06:16:43,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643588356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:43,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:43,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:43,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507582879] [2022-01-11 06:16:43,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:43,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:43,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:43,316 INFO L87 Difference]: Start difference. First operand 5392 states and 8550 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:43,547 INFO L93 Difference]: Finished difference Result 12049 states and 19363 transitions. [2022-01-11 06:16:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-11 06:16:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:43,567 INFO L225 Difference]: With dead ends: 12049 [2022-01-11 06:16:43,567 INFO L226 Difference]: Without dead ends: 7099 [2022-01-11 06:16:43,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:43,572 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 115 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:43,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 390 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-01-11 06:16:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 6961. [2022-01-11 06:16:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 1.5849137931034483) internal successors, (11031), 6960 states have internal predecessors, (11031), 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) [2022-01-11 06:16:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 11031 transitions. [2022-01-11 06:16:43,849 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 11031 transitions. Word has length 67 [2022-01-11 06:16:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:43,849 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 11031 transitions. [2022-01-11 06:16:43,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 11031 transitions. [2022-01-11 06:16:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-11 06:16:43,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:43,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:43,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-11 06:16:43,851 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:43,851 INFO L85 PathProgramCache]: Analyzing trace with hash 905286985, now seen corresponding path program 1 times [2022-01-11 06:16:43,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:43,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321658759] [2022-01-11 06:16:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:43,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:43,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:43,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321658759] [2022-01-11 06:16:43,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321658759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:43,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:43,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:43,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071615391] [2022-01-11 06:16:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:43,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:43,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:43,885 INFO L87 Difference]: Start difference. First operand 6961 states and 11031 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:44,263 INFO L93 Difference]: Finished difference Result 20759 states and 32891 transitions. [2022-01-11 06:16:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-11 06:16:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:44,290 INFO L225 Difference]: With dead ends: 20759 [2022-01-11 06:16:44,290 INFO L226 Difference]: Without dead ends: 13872 [2022-01-11 06:16:44,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:44,298 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 180 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:44,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 578 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2022-01-11 06:16:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 6969. [2022-01-11 06:16:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6969 states, 6968 states have (on average 1.5842422502870264) internal successors, (11039), 6968 states have internal predecessors, (11039), 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) [2022-01-11 06:16:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6969 states to 6969 states and 11039 transitions. [2022-01-11 06:16:44,611 INFO L78 Accepts]: Start accepts. Automaton has 6969 states and 11039 transitions. Word has length 67 [2022-01-11 06:16:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:44,611 INFO L470 AbstractCegarLoop]: Abstraction has 6969 states and 11039 transitions. [2022-01-11 06:16:44,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6969 states and 11039 transitions. [2022-01-11 06:16:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-11 06:16:44,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:44,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:44,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-11 06:16:44,613 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1103736171, now seen corresponding path program 1 times [2022-01-11 06:16:44,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:44,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211596613] [2022-01-11 06:16:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:44,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:44,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:44,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211596613] [2022-01-11 06:16:44,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211596613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:44,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:44,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:16:44,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998894834] [2022-01-11 06:16:44,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:44,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:16:44,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:16:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:16:44,686 INFO L87 Difference]: Start difference. First operand 6969 states and 11039 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:45,416 INFO L93 Difference]: Finished difference Result 26390 states and 41854 transitions. [2022-01-11 06:16:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:16:45,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-11 06:16:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:45,445 INFO L225 Difference]: With dead ends: 26390 [2022-01-11 06:16:45,445 INFO L226 Difference]: Without dead ends: 19479 [2022-01-11 06:16:45,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-11 06:16:45,452 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 509 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:45,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 867 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:16:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19479 states. [2022-01-11 06:16:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19479 to 12805. [2022-01-11 06:16:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12805 states, 12804 states have (on average 1.563573883161512) internal successors, (20020), 12804 states have internal predecessors, (20020), 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) [2022-01-11 06:16:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12805 states to 12805 states and 20020 transitions. [2022-01-11 06:16:45,989 INFO L78 Accepts]: Start accepts. Automaton has 12805 states and 20020 transitions. Word has length 68 [2022-01-11 06:16:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:45,989 INFO L470 AbstractCegarLoop]: Abstraction has 12805 states and 20020 transitions. [2022-01-11 06:16:45,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12805 states and 20020 transitions. [2022-01-11 06:16:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-11 06:16:45,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:45,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:45,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-11 06:16:45,992 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 796138447, now seen corresponding path program 1 times [2022-01-11 06:16:45,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:45,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509750529] [2022-01-11 06:16:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:45,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:46,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509750529] [2022-01-11 06:16:46,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509750529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:46,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:46,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:46,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869286135] [2022-01-11 06:16:46,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:46,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:46,142 INFO L87 Difference]: Start difference. First operand 12805 states and 20020 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:48,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 06:16:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:49,414 INFO L93 Difference]: Finished difference Result 35137 states and 55580 transitions. [2022-01-11 06:16:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-11 06:16:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:49,468 INFO L225 Difference]: With dead ends: 35137 [2022-01-11 06:16:49,468 INFO L226 Difference]: Without dead ends: 23176 [2022-01-11 06:16:49,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:49,479 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 103 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 395 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-11 06:16:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23176 states. [2022-01-11 06:16:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23176 to 23174. [2022-01-11 06:16:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23174 states, 23173 states have (on average 1.567729685409744) internal successors, (36329), 23173 states have internal predecessors, (36329), 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) [2022-01-11 06:16:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23174 states to 23174 states and 36329 transitions. [2022-01-11 06:16:50,575 INFO L78 Accepts]: Start accepts. Automaton has 23174 states and 36329 transitions. Word has length 68 [2022-01-11 06:16:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:50,575 INFO L470 AbstractCegarLoop]: Abstraction has 23174 states and 36329 transitions. [2022-01-11 06:16:50,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 06:16:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 23174 states and 36329 transitions. [2022-01-11 06:16:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-11 06:16:50,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:50,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:50,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-11 06:16:50,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash -341401050, now seen corresponding path program 1 times [2022-01-11 06:16:50,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:50,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705156894] [2022-01-11 06:16:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:50,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:50,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:50,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705156894] [2022-01-11 06:16:50,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705156894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:50,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:50,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 06:16:50,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485754910] [2022-01-11 06:16:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:50,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 06:16:50,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 06:16:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 06:16:50,649 INFO L87 Difference]: Start difference. First operand 23174 states and 36329 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2022-01-11 06:16:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:52,819 INFO L93 Difference]: Finished difference Result 67076 states and 105295 transitions. [2022-01-11 06:16:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 06:16:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 70 [2022-01-11 06:16:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:52,881 INFO L225 Difference]: With dead ends: 67076 [2022-01-11 06:16:52,881 INFO L226 Difference]: Without dead ends: 44746 [2022-01-11 06:16:52,905 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 [2022-01-11 06:16:52,905 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 473 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:52,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 391 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44746 states. [2022-01-11 06:16:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44746 to 44744. [2022-01-11 06:16:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44744 states, 44743 states have (on average 1.5508571173144403) internal successors, (69390), 44743 states have internal predecessors, (69390), 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) [2022-01-11 06:16:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44744 states to 44744 states and 69390 transitions. [2022-01-11 06:16:55,532 INFO L78 Accepts]: Start accepts. Automaton has 44744 states and 69390 transitions. Word has length 70 [2022-01-11 06:16:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:16:55,532 INFO L470 AbstractCegarLoop]: Abstraction has 44744 states and 69390 transitions. [2022-01-11 06:16:55,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2022-01-11 06:16:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 44744 states and 69390 transitions. [2022-01-11 06:16:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-11 06:16:55,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:16:55,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:16:55,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-11 06:16:55,536 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:16:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:16:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1762809366, now seen corresponding path program 1 times [2022-01-11 06:16:55,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:16:55,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544350424] [2022-01-11 06:16:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:16:55,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:16:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:16:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:16:55,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:16:55,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544350424] [2022-01-11 06:16:55,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544350424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:16:55,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:16:55,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:16:55,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126243183] [2022-01-11 06:16:55,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:16:55,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:16:55,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:16:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:16:55,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:55,579 INFO L87 Difference]: Start difference. First operand 44744 states and 69390 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-01-11 06:16:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:16:58,678 INFO L93 Difference]: Finished difference Result 84397 states and 131532 transitions. [2022-01-11 06:16:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:16:58,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2022-01-11 06:16:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:16:58,777 INFO L225 Difference]: With dead ends: 84397 [2022-01-11 06:16:58,777 INFO L226 Difference]: Without dead ends: 61212 [2022-01-11 06:16:58,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:16:58,808 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 104 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:16:58,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 446 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:16:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61212 states. [2022-01-11 06:17:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61212 to 61210. [2022-01-11 06:17:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61210 states, 61209 states have (on average 1.544380728324266) internal successors, (94530), 61209 states have internal predecessors, (94530), 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) [2022-01-11 06:17:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61210 states to 61210 states and 94530 transitions. [2022-01-11 06:17:02,308 INFO L78 Accepts]: Start accepts. Automaton has 61210 states and 94530 transitions. Word has length 71 [2022-01-11 06:17:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:17:02,308 INFO L470 AbstractCegarLoop]: Abstraction has 61210 states and 94530 transitions. [2022-01-11 06:17:02,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-01-11 06:17:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 61210 states and 94530 transitions. [2022-01-11 06:17:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-11 06:17:02,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:17:02,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:17:02,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-11 06:17:02,312 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:17:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:17:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash -258387037, now seen corresponding path program 1 times [2022-01-11 06:17:02,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:17:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799718229] [2022-01-11 06:17:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:17:02,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:17:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:17:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:17:02,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:17:02,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799718229] [2022-01-11 06:17:02,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799718229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:17:02,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:17:02,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:17:02,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547909081] [2022-01-11 06:17:02,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:17:02,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:17:02,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:17:02,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:17:02,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:17:02,357 INFO L87 Difference]: Start difference. First operand 61210 states and 94530 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-01-11 06:17:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:17:06,553 INFO L93 Difference]: Finished difference Result 141061 states and 219169 transitions. [2022-01-11 06:17:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:17:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2022-01-11 06:17:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:17:06,688 INFO L225 Difference]: With dead ends: 141061 [2022-01-11 06:17:06,688 INFO L226 Difference]: Without dead ends: 81695 [2022-01-11 06:17:06,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:17:06,749 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 109 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:17:06,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 391 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:17:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81695 states. [2022-01-11 06:17:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81695 to 79863. [2022-01-11 06:17:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79863 states, 79862 states have (on average 1.5363126393027973) internal successors, (122693), 79862 states have internal predecessors, (122693), 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) [2022-01-11 06:17:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79863 states to 79863 states and 122693 transitions. [2022-01-11 06:17:11,606 INFO L78 Accepts]: Start accepts. Automaton has 79863 states and 122693 transitions. Word has length 71 [2022-01-11 06:17:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:17:11,606 INFO L470 AbstractCegarLoop]: Abstraction has 79863 states and 122693 transitions. [2022-01-11 06:17:11,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-01-11 06:17:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 79863 states and 122693 transitions. [2022-01-11 06:17:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-11 06:17:11,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:17:11,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:17:11,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-11 06:17:11,610 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:17:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:17:11,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1234526239, now seen corresponding path program 1 times [2022-01-11 06:17:11,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:17:11,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25718793] [2022-01-11 06:17:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:17:11,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:17:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:17:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:17:11,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:17:11,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25718793] [2022-01-11 06:17:11,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25718793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:17:11,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:17:11,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 06:17:11,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661287868] [2022-01-11 06:17:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:17:11,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 06:17:11,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:17:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 06:17:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:17:11,641 INFO L87 Difference]: Start difference. First operand 79863 states and 122693 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-01-11 06:17:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:17:19,698 INFO L93 Difference]: Finished difference Result 238529 states and 366673 transitions. [2022-01-11 06:17:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 06:17:19,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2022-01-11 06:17:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:17:20,119 INFO L225 Difference]: With dead ends: 238529 [2022-01-11 06:17:20,119 INFO L226 Difference]: Without dead ends: 159490 [2022-01-11 06:17:20,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 06:17:20,182 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 166 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:17:20,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 471 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:17:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159490 states. [2022-01-11 06:17:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159490 to 79903. [2022-01-11 06:17:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79903 states, 79902 states have (on average 1.5360441540887588) internal successors, (122733), 79902 states have internal predecessors, (122733), 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) [2022-01-11 06:17:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79903 states to 79903 states and 122733 transitions. [2022-01-11 06:17:25,318 INFO L78 Accepts]: Start accepts. Automaton has 79903 states and 122733 transitions. Word has length 71 [2022-01-11 06:17:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:17:25,319 INFO L470 AbstractCegarLoop]: Abstraction has 79903 states and 122733 transitions. [2022-01-11 06:17:25,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-01-11 06:17:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 79903 states and 122733 transitions. [2022-01-11 06:17:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-11 06:17:25,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:17:25,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:17:25,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-11 06:17:25,339 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:17:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:17:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1015808187, now seen corresponding path program 1 times [2022-01-11 06:17:25,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:17:25,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106163531] [2022-01-11 06:17:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:17:25,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:17:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:17:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:17:25,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:17:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106163531] [2022-01-11 06:17:25,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106163531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:17:25,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:17:25,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:17:25,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634900805] [2022-01-11 06:17:25,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:17:25,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:17:25,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:17:25,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:17:25,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:17:25,532 INFO L87 Difference]: Start difference. First operand 79903 states and 122733 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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)