/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 01:56:53,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 01:56:53,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 01:56:53,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 01:56:53,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 01:56:53,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 01:56:53,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 01:56:53,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 01:56:53,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 01:56:53,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 01:56:53,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 01:56:53,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 01:56:53,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 01:56:53,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 01:56:53,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 01:56:53,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 01:56:53,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 01:56:53,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 01:56:53,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 01:56:53,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 01:56:53,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 01:56:53,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 01:56:53,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 01:56:53,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 01:56:53,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 01:56:53,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 01:56:53,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 01:56:53,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 01:56:53,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 01:56:53,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 01:56:53,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 01:56:53,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 01:56:53,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 01:56:53,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 01:56:53,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 01:56:53,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 01:56:53,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 01:56:53,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 01:56:53,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 01:56:53,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 01:56:53,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 01:56:53,346 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 01:56:53,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 01:56:53,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 01:56:53,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 01:56:53,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 01:56:53,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 01:56:53,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 01:56:53,368 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 01:56:53,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 01:56:53,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 01:56:53,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 01:56:53,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 01:56:53,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 01:56:53,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 01:56:53,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 01:56:53,369 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 01:56:53,369 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 01:56:53,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 01:56:53,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 01:56:53,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 01:56:53,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 01:56:53,371 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 01:56:53,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 01:56:53,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 01:56:53,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 01:56:53,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 01:56:53,372 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 01:56:53,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 01:56:53,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 01:56:53,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 01:56:53,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 01:56:53,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 01:56:53,594 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 01:56:53,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2022-01-11 01:56:53,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54a0d4b6c/025a7d38498c4257934116445587b85c/FLAGea6a9937c [2022-01-11 01:56:53,944 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 01:56:53,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2022-01-11 01:56:53,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54a0d4b6c/025a7d38498c4257934116445587b85c/FLAGea6a9937c [2022-01-11 01:56:54,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54a0d4b6c/025a7d38498c4257934116445587b85c [2022-01-11 01:56:54,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 01:56:54,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 01:56:54,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 01:56:54,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 01:56:54,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 01:56:54,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9a48a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54, skipping insertion in model container [2022-01-11 01:56:54,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 01:56:54,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 01:56:54,513 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/eureka_01-2.c[323,336] [2022-01-11 01:56:54,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 01:56:54,543 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 01:56:54,583 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/eureka_01-2.c[323,336] [2022-01-11 01:56:54,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 01:56:54,611 INFO L208 MainTranslator]: Completed translation [2022-01-11 01:56:54,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54 WrapperNode [2022-01-11 01:56:54,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 01:56:54,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 01:56:54,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 01:56:54,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 01:56:54,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,643 INFO L137 Inliner]: procedures = 16, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 199 [2022-01-11 01:56:54,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 01:56:54,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 01:56:54,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 01:56:54,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 01:56:54,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 01:56:54,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 01:56:54,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 01:56:54,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 01:56:54,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (1/1) ... [2022-01-11 01:56:54,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 01:56:54,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:56:54,711 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 01:56:54,713 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 01:56:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 01:56:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 01:56:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-01-11 01:56:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 01:56:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 01:56:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 01:56:54,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 01:56:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 01:56:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 01:56:54,821 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 01:56:54,822 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 01:56:55,001 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 01:56:55,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 01:56:55,005 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-11 01:56:55,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:56:55 BoogieIcfgContainer [2022-01-11 01:56:55,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 01:56:55,007 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 01:56:55,007 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 01:56:55,008 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 01:56:55,010 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:56:55" (1/1) ... [2022-01-11 01:56:55,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:56:55 BasicIcfg [2022-01-11 01:56:55,119 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 01:56:55,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 01:56:55,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 01:56:55,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 01:56:55,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 01:56:54" (1/4) ... [2022-01-11 01:56:55,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c172eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:56:55, skipping insertion in model container [2022-01-11 01:56:55,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:56:54" (2/4) ... [2022-01-11 01:56:55,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c172eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:56:55, skipping insertion in model container [2022-01-11 01:56:55,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:56:55" (3/4) ... [2022-01-11 01:56:55,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c172eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 01:56:55, skipping insertion in model container [2022-01-11 01:56:55,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:56:55" (4/4) ... [2022-01-11 01:56:55,123 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.cTransformedIcfg [2022-01-11 01:56:55,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 01:56:55,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 01:56:55,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 01:56:55,156 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 01:56:55,156 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 01:56:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 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 01:56:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 01:56:55,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:56:55,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:56:55,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:56:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:56:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1467780500, now seen corresponding path program 1 times [2022-01-11 01:56:55,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:56:55,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625320747] [2022-01-11 01:56:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:55,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:56:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:55,340 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 01:56:55,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:56:55,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625320747] [2022-01-11 01:56:55,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625320747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:56:55,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:56:55,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 01:56:55,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174228778] [2022-01-11 01:56:55,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:56:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 01:56:55,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:56:55,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 01:56:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 01:56:55,368 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 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 5.5) internal successors, (11), 2 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) [2022-01-11 01:56:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:56:55,383 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-01-11 01:56:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 01:56:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 01:56:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:56:55,390 INFO L225 Difference]: With dead ends: 47 [2022-01-11 01:56:55,390 INFO L226 Difference]: Without dead ends: 22 [2022-01-11 01:56:55,392 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 01:56:55,396 INFO L933 BasicCegarLoop]: 33 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, 33 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 01:56:55,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 01:56:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-11 01:56:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-11 01:56:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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 01:56:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-11 01:56:55,430 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2022-01-11 01:56:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:56:55,430 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-11 01:56:55,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-01-11 01:56:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-11 01:56:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 01:56:55,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:56:55,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:56:55,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 01:56:55,433 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:56:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:56:55,438 INFO L85 PathProgramCache]: Analyzing trace with hash 548753239, now seen corresponding path program 1 times [2022-01-11 01:56:55,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:56:55,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143045190] [2022-01-11 01:56:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:55,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:56:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:55,700 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 01:56:55,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:56:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143045190] [2022-01-11 01:56:55,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143045190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:56:55,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:56:55,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 01:56:55,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675142244] [2022-01-11 01:56:55,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:56:55,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 01:56:55,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:56:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 01:56:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 01:56:55,704 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-01-11 01:56:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:56:55,830 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-01-11 01:56:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 01:56:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 01:56:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:56:55,831 INFO L225 Difference]: With dead ends: 48 [2022-01-11 01:56:55,831 INFO L226 Difference]: Without dead ends: 41 [2022-01-11 01:56:55,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 01:56:55,833 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 01:56:55,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 23 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 01:56:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-11 01:56:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2022-01-11 01:56:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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 01:56:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-11 01:56:55,837 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2022-01-11 01:56:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:56:55,838 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-11 01:56:55,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-01-11 01:56:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-11 01:56:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 01:56:55,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:56:55,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:56:55,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 01:56:55,839 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:56:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:56:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash 528210313, now seen corresponding path program 1 times [2022-01-11 01:56:55,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:56:55,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295924455] [2022-01-11 01:56:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:55,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:56:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 01:56:55,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:56:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295924455] [2022-01-11 01:56:55,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295924455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:56:55,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:56:55,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 01:56:55,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291507539] [2022-01-11 01:56:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:56:55,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 01:56:55,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:56:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 01:56:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 01:56:55,995 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 01:56:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:56:56,049 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-01-11 01:56:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 01:56:56,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-01-11 01:56:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:56:56,050 INFO L225 Difference]: With dead ends: 44 [2022-01-11 01:56:56,050 INFO L226 Difference]: Without dead ends: 26 [2022-01-11 01:56:56,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 01:56:56,051 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 01:56:56,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 01:56:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-11 01:56:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-11 01:56:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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) [2022-01-11 01:56:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-01-11 01:56:56,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2022-01-11 01:56:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:56:56,057 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-01-11 01:56:56,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 01:56:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-01-11 01:56:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-11 01:56:56,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:56:56,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:56:56,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 01:56:56,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:56:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:56:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash 680376306, now seen corresponding path program 1 times [2022-01-11 01:56:56,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:56:56,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937684089] [2022-01-11 01:56:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:56,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:56:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 01:56:56,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:56:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937684089] [2022-01-11 01:56:56,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937684089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:56:56,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214808577] [2022-01-11 01:56:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:56,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:56:56,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:56:56,272 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) [2022-01-11 01:56:56,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 01:56:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:56,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-11 01:56:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:56:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 01:56:56,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:56:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 01:56:56,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214808577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:56:56,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:56:56,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-11 01:56:56,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942928932] [2022-01-11 01:56:56,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:56:56,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-11 01:56:56,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:56:56,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-11 01:56:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-11 01:56:56,605 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 01:56:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:56:56,800 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-01-11 01:56:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 01:56:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 17 [2022-01-11 01:56:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:56:56,801 INFO L225 Difference]: With dead ends: 68 [2022-01-11 01:56:56,801 INFO L226 Difference]: Without dead ends: 50 [2022-01-11 01:56:56,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-11 01:56:56,802 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 139 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 01:56:56,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 62 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 01:56:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-11 01:56:56,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2022-01-11 01:56:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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 01:56:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-01-11 01:56:56,807 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-01-11 01:56:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:56:56,807 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-01-11 01:56:56,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 01:56:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-01-11 01:56:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-11 01:56:56,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:56:56,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:56:56,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 01:56:57,019 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 [2022-01-11 01:56:57,019 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:56:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:56:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1007184137, now seen corresponding path program 1 times [2022-01-11 01:56:57,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:56:57,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22462286] [2022-01-11 01:56:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:57,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:56:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 01:56:57,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:56:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22462286] [2022-01-11 01:56:57,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22462286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:56:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934458415] [2022-01-11 01:56:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:57,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:56:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:56:57,122 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) [2022-01-11 01:56:57,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 01:56:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-11 01:56:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:56:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 01:56:57,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:56:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 01:56:57,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934458415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:56:57,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:56:57,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-01-11 01:56:57,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404042197] [2022-01-11 01:56:57,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:56:57,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-11 01:56:57,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:56:57,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-11 01:56:57,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-11 01:56:57,511 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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 01:56:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:56:57,728 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2022-01-11 01:56:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 01:56:57,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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 26 [2022-01-11 01:56:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:56:57,729 INFO L225 Difference]: With dead ends: 76 [2022-01-11 01:56:57,729 INFO L226 Difference]: Without dead ends: 42 [2022-01-11 01:56:57,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-11 01:56:57,730 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 01:56:57,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 95 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 01:56:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-11 01:56:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-01-11 01:56:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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 01:56:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-01-11 01:56:57,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 26 [2022-01-11 01:56:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:56:57,737 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-01-11 01:56:57,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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 01:56:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-01-11 01:56:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-11 01:56:57,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:56:57,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:56:57,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 01:56:57,938 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 [2022-01-11 01:56:57,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:56:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:56:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash -136784922, now seen corresponding path program 1 times [2022-01-11 01:56:57,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:56:57,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835852922] [2022-01-11 01:56:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:57,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:56:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 01:56:58,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:56:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835852922] [2022-01-11 01:56:58,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835852922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:56:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889133420] [2022-01-11 01:56:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:56:58,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:56:58,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:56:58,064 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) [2022-01-11 01:56:58,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 01:56:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:56:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-11 01:56:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:56:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 01:56:58,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:56:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 01:56:59,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889133420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:56:59,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:56:59,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 15 [2022-01-11 01:56:59,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043833292] [2022-01-11 01:56:59,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:56:59,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 01:56:59,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:56:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 01:56:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-11 01:56:59,334 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) [2022-01-11 01:56:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:56:59,948 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-01-11 01:56:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 01:56:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) Word has length 32 [2022-01-11 01:56:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:56:59,949 INFO L225 Difference]: With dead ends: 87 [2022-01-11 01:56:59,949 INFO L226 Difference]: Without dead ends: 55 [2022-01-11 01:56:59,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-01-11 01:56:59,950 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 01:56:59,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 91 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 01:56:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-11 01:56:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-11 01:56:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 53 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 01:56:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-01-11 01:56:59,958 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 32 [2022-01-11 01:56:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:56:59,958 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-01-11 01:56:59,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) [2022-01-11 01:56:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-01-11 01:56:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-11 01:56:59,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:56:59,959 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:56:59,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 01:57:00,171 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 [2022-01-11 01:57:00,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:57:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:57:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash -843691288, now seen corresponding path program 2 times [2022-01-11 01:57:00,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:57:00,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141187146] [2022-01-11 01:57:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:57:00,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:57:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:57:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-11 01:57:00,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:57:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141187146] [2022-01-11 01:57:00,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141187146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:57:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538526226] [2022-01-11 01:57:00,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 01:57:00,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:57:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:57:00,454 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) [2022-01-11 01:57:00,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 01:57:00,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 01:57:00,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 01:57:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 01:57:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:57:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 60 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-11 01:57:01,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:57:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-11 01:57:01,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538526226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:57:01,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:57:01,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-01-11 01:57:01,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483087861] [2022-01-11 01:57:01,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:57:01,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-11 01:57:01,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:57:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-11 01:57:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-11 01:57:01,504 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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 01:57:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:57:04,192 INFO L93 Difference]: Finished difference Result 149 states and 187 transitions. [2022-01-11 01:57:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-11 01:57:04,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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 50 [2022-01-11 01:57:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:57:04,193 INFO L225 Difference]: With dead ends: 149 [2022-01-11 01:57:04,193 INFO L226 Difference]: Without dead ends: 142 [2022-01-11 01:57:04,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2022-01-11 01:57:04,194 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 466 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-11 01:57:04,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 133 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-11 01:57:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-11 01:57:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 63. [2022-01-11 01:57:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 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 01:57:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-01-11 01:57:04,214 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 50 [2022-01-11 01:57:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:57:04,214 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-01-11 01:57:04,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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 01:57:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-01-11 01:57:04,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-11 01:57:04,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:57:04,217 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:57:04,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 01:57:04,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:57:04,423 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:57:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:57:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1216815528, now seen corresponding path program 3 times [2022-01-11 01:57:04,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:57:04,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549761452] [2022-01-11 01:57:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:57:04,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:57:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:57:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-11 01:57:04,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:57:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549761452] [2022-01-11 01:57:04,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549761452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:57:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78185579] [2022-01-11 01:57:04,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 01:57:04,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:57:04,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:57:04,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 01:57:04,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 01:57:07,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-11 01:57:07,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 01:57:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-11 01:57:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:57:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-11 01:57:07,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:57:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-11 01:57:09,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78185579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:57:09,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:57:09,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 18 [2022-01-11 01:57:09,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697586073] [2022-01-11 01:57:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:57:09,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 01:57:09,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:57:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 01:57:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-01-11 01:57:09,866 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 01:57:10,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:57:10,846 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-01-11 01:57:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 01:57:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 59 [2022-01-11 01:57:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:57:10,847 INFO L225 Difference]: With dead ends: 128 [2022-01-11 01:57:10,847 INFO L226 Difference]: Without dead ends: 73 [2022-01-11 01:57:10,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2022-01-11 01:57:10,848 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 01:57:10,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 109 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 01:57:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-11 01:57:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-01-11 01:57:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 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 01:57:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-01-11 01:57:10,860 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 59 [2022-01-11 01:57:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:57:10,860 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-01-11 01:57:10,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 01:57:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-01-11 01:57:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-11 01:57:10,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:57:10,861 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:57:10,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 01:57:11,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:57:11,062 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:57:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:57:11,062 INFO L85 PathProgramCache]: Analyzing trace with hash 485969933, now seen corresponding path program 4 times [2022-01-11 01:57:11,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:57:11,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721171621] [2022-01-11 01:57:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:57:11,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:57:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:57:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-11 01:57:11,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:57:11,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721171621] [2022-01-11 01:57:11,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721171621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:57:11,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237861669] [2022-01-11 01:57:11,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 01:57:11,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:57:11,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:57:11,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 01:57:11,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 01:57:11,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 01:57:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 01:57:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-11 01:57:11,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:57:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-11 01:57:11,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:57:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-11 01:57:11,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237861669] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-11 01:57:11,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-11 01:57:11,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-01-11 01:57:11,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180421319] [2022-01-11 01:57:11,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:57:11,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 01:57:11,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:57:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 01:57:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-11 01:57:11,809 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 01:57:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:57:11,880 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2022-01-11 01:57:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 01:57:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 01:57:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:57:11,881 INFO L225 Difference]: With dead ends: 138 [2022-01-11 01:57:11,881 INFO L226 Difference]: Without dead ends: 80 [2022-01-11 01:57:11,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-11 01:57:11,882 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 01:57:11,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 01:57:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-11 01:57:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-11 01:57:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:57:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-01-11 01:57:11,903 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 68 [2022-01-11 01:57:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:57:11,903 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-01-11 01:57:11,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 01:57:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-01-11 01:57:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-11 01:57:11,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:57:11,904 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:57:11,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 01:57:12,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:57:12,105 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:57:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:57:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash 506307308, now seen corresponding path program 5 times [2022-01-11 01:57:12,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:57:12,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567031387] [2022-01-11 01:57:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:57:12,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:57:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:57:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-11 01:57:12,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:57:12,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567031387] [2022-01-11 01:57:12,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567031387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:57:12,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258880220] [2022-01-11 01:57:12,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 01:57:12,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:57:12,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:57:12,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 01:57:12,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process