/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_LAZY.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 14:31:44,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 14:31:44,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 14:31:44,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 14:31:44,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 14:31:44,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 14:31:44,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 14:31:44,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 14:31:44,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 14:31:44,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 14:31:44,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 14:31:44,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 14:31:44,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 14:31:44,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 14:31:44,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 14:31:44,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 14:31:44,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 14:31:44,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 14:31:44,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 14:31:44,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 14:31:44,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 14:31:44,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 14:31:44,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 14:31:44,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 14:31:44,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 14:31:44,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 14:31:44,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 14:31:44,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 14:31:44,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 14:31:44,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 14:31:44,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 14:31:44,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 14:31:44,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 14:31:44,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 14:31:44,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 14:31:44,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 14:31:44,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 14:31:44,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 14:31:44,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 14:31:44,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 14:31:44,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 14:31:44,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 14:31:44,446 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 14:31:44,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 14:31:44,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 14:31:44,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 14:31:44,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 14:31:44,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 14:31:44,447 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 14:31:44,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 14:31:44,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 14:31:44,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:31:44,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 14:31:44,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 14:31:44,450 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 14:31:44,450 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 14:31:44,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 14:31:44,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 14:31:44,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 14:31:44,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 14:31:44,643 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 14:31:44,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-01-10 14:31:44,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1250c754d/94b00d3a8fdc4bffbf17e19ae90bd316/FLAGcf1563be2 [2022-01-10 14:31:45,047 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 14:31:45,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-01-10 14:31:45,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1250c754d/94b00d3a8fdc4bffbf17e19ae90bd316/FLAGcf1563be2 [2022-01-10 14:31:45,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1250c754d/94b00d3a8fdc4bffbf17e19ae90bd316 [2022-01-10 14:31:45,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 14:31:45,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 14:31:45,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 14:31:45,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 14:31:45,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 14:31:45,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17572e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45, skipping insertion in model container [2022-01-10 14:31:45,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 14:31:45,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:31:45,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-01-10 14:31:45,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:31:45,244 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 14:31:45,253 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-01-10 14:31:45,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:31:45,263 INFO L208 MainTranslator]: Completed translation [2022-01-10 14:31:45,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45 WrapperNode [2022-01-10 14:31:45,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 14:31:45,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 14:31:45,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 14:31:45,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 14:31:45,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,283 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-01-10 14:31:45,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 14:31:45,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 14:31:45,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 14:31:45,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 14:31:45,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 14:31:45,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 14:31:45,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 14:31:45,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 14:31:45,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:31:45,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:45,326 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) [2022-01-10 14:31:45,327 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 [2022-01-10 14:31:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 14:31:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 14:31:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 14:31:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 14:31:45,403 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 14:31:45,404 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 14:31:45,477 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 14:31:45,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 14:31:45,481 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 14:31:45,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:45 BoogieIcfgContainer [2022-01-10 14:31:45,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 14:31:45,483 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 14:31:45,483 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 14:31:45,484 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 14:31:45,485 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:45" (1/1) ... [2022-01-10 14:31:45,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:31:45 BasicIcfg [2022-01-10 14:31:45,545 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 14:31:45,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 14:31:45,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 14:31:45,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 14:31:45,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:31:45" (1/4) ... [2022-01-10 14:31:45,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c357a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:45, skipping insertion in model container [2022-01-10 14:31:45,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:45" (2/4) ... [2022-01-10 14:31:45,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c357a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:45, skipping insertion in model container [2022-01-10 14:31:45,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:45" (3/4) ... [2022-01-10 14:31:45,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c357a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:31:45, skipping insertion in model container [2022-01-10 14:31:45,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:31:45" (4/4) ... [2022-01-10 14:31:45,550 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.cTransformedIcfg [2022-01-10 14:31:45,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 14:31:45,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 14:31:45,580 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 14:31:45,585 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 [2022-01-10 14:31:45,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 14:31:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 14:31:45,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:45,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:45,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1009780789, now seen corresponding path program 1 times [2022-01-10 14:31:45,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:45,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620980298] [2022-01-10 14:31:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:45,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:31:45,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:45,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620980298] [2022-01-10 14:31:45,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620980298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:45,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:45,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 14:31:45,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423913324] [2022-01-10 14:31:45,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:45,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 14:31:45,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:45,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 14:31:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 14:31:45,733 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:45,741 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-01-10 14:31:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 14:31:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-01-10 14:31:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:45,747 INFO L225 Difference]: With dead ends: 22 [2022-01-10 14:31:45,747 INFO L226 Difference]: Without dead ends: 9 [2022-01-10 14:31:45,749 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 [2022-01-10 14:31:45,754 INFO L933 BasicCegarLoop]: 15 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, 15 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 [2022-01-10 14:31:45,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-01-10 14:31:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-01-10 14:31:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-01-10 14:31:45,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-01-10 14:31:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-01-10 14:31:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-01-10 14:31:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 14:31:45,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:45,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:45,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 14:31:45,780 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1010734101, now seen corresponding path program 1 times [2022-01-10 14:31:45,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:45,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584430657] [2022-01-10 14:31:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:45,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:31:45,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584430657] [2022-01-10 14:31:45,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584430657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:45,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:45,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 14:31:45,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659912001] [2022-01-10 14:31:45,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:45,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:31:45,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:31:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:45,887 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:45,907 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-01-10 14:31:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:31:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-01-10 14:31:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:45,908 INFO L225 Difference]: With dead ends: 18 [2022-01-10 14:31:45,908 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 14:31:45,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:45,909 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:45,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 14:31:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 14:31:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-01-10 14:31:45,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-01-10 14:31:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:45,912 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-01-10 14:31:45,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-01-10 14:31:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 14:31:45,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:45,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:45,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 14:31:45,913 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1591009489, now seen corresponding path program 1 times [2022-01-10 14:31:45,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:45,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813062351] [2022-01-10 14:31:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:45,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 14:31:45,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:45,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813062351] [2022-01-10 14:31:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813062351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:45,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:45,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:31:45,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895653494] [2022-01-10 14:31:45,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:45,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:31:45,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:31:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:31:45,973 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:45,986 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2022-01-10 14:31:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:31:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-01-10 14:31:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:45,987 INFO L225 Difference]: With dead ends: 18 [2022-01-10 14:31:45,987 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 14:31:45,987 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 [2022-01-10 14:31:45,988 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:45,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 14:31:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-10 14:31:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-01-10 14:31:45,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-01-10 14:31:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:45,991 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-01-10 14:31:45,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-01-10 14:31:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 14:31:45,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:45,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:45,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 14:31:45,992 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2077457296, now seen corresponding path program 1 times [2022-01-10 14:31:45,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:45,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801828062] [2022-01-10 14:31:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:45,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 14:31:46,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801828062] [2022-01-10 14:31:46,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801828062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408120853] [2022-01-10 14:31:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:46,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:46,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:46,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:46,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 14:31:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:46,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 14:31:46,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 14:31:46,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 14:31:46,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408120853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:46,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:46,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 14:31:46,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053468210] [2022-01-10 14:31:46,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:46,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 14:31:46,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 14:31:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 14:31:46,421 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:46,640 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2022-01-10 14:31:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 14:31:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 14:31:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:46,642 INFO L225 Difference]: With dead ends: 30 [2022-01-10 14:31:46,642 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 14:31:46,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-01-10 14:31:46,643 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:46,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:31:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 14:31:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2022-01-10 14:31:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-01-10 14:31:46,648 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2022-01-10 14:31:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:46,648 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-01-10 14:31:46,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-01-10 14:31:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 14:31:46,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:46,649 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:46,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 14:31:46,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:46,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1280004739, now seen corresponding path program 1 times [2022-01-10 14:31:46,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:46,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656707583] [2022-01-10 14:31:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:46,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:31:46,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:46,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656707583] [2022-01-10 14:31:46,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656707583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:46,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673108898] [2022-01-10 14:31:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:46,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:46,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:46,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 14:31:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 14:31:47,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:31:47,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:31:47,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673108898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:47,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:47,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-10 14:31:47,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777637481] [2022-01-10 14:31:47,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:47,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 14:31:47,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 14:31:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-10 14:31:47,322 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:47,870 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2022-01-10 14:31:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 14:31:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 15 [2022-01-10 14:31:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:47,873 INFO L225 Difference]: With dead ends: 57 [2022-01-10 14:31:47,873 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 14:31:47,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 14:31:47,874 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:47,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 14:31:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 14:31:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-01-10 14:31:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2022-01-10 14:31:47,886 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 15 [2022-01-10 14:31:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:47,886 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2022-01-10 14:31:47,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2022-01-10 14:31:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 14:31:47,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:47,887 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:47,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 14:31:48,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:48,091 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:48,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1595672386, now seen corresponding path program 1 times [2022-01-10 14:31:48,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:48,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134280562] [2022-01-10 14:31:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:48,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 14:31:48,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134280562] [2022-01-10 14:31:48,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134280562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994608448] [2022-01-10 14:31:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:48,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:48,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:48,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 14:31:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 14:31:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 14:31:48,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:31:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994608448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:56,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:56,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 13 [2022-01-10 14:31:56,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132088567] [2022-01-10 14:31:56,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:56,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 14:31:56,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 14:31:56,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=98, Unknown=2, NotChecked=0, Total=156 [2022-01-10 14:31:56,681 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:06,537 WARN L228 SmtUtils]: Spent 9.80s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 14:32:21,794 WARN L228 SmtUtils]: Spent 14.10s on a formula simplification. DAG size of input: 58 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 14:32:30,443 WARN L228 SmtUtils]: Spent 6.68s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 14:32:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:30,931 INFO L93 Difference]: Finished difference Result 90 states and 123 transitions. [2022-01-10 14:32:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 14:32:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 14:32:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:30,933 INFO L225 Difference]: With dead ends: 90 [2022-01-10 14:32:30,933 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 14:32:30,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=97, Invalid=173, Unknown=2, NotChecked=0, Total=272 [2022-01-10 14:32:30,936 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 14:32:30,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 53 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 14:32:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 14:32:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-01-10 14:32:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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) [2022-01-10 14:32:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-01-10 14:32:30,944 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 18 [2022-01-10 14:32:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:30,944 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-01-10 14:32:30,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-01-10 14:32:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 14:32:30,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:30,945 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:30,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 14:32:31,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:31,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1511344590, now seen corresponding path program 2 times [2022-01-10 14:32:31,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:31,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378061868] [2022-01-10 14:32:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:31,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 14:32:31,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:31,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378061868] [2022-01-10 14:32:31,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378061868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:32:31,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346895988] [2022-01-10 14:32:31,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:32:31,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:31,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:31,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:32:31,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 14:32:31,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:32:31,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:32:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 14:32:31,447 INFO L286 TraceCheckSpWp]: Computing forward predicates...