/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_BITWISE.epf -i ../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 09:49:50,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 09:49:50,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 09:49:50,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 09:49:50,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 09:49:50,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 09:49:50,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 09:49:50,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 09:49:50,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 09:49:50,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 09:49:50,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 09:49:50,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 09:49:50,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 09:49:50,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 09:49:50,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 09:49:50,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 09:49:50,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 09:49:50,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 09:49:50,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 09:49:50,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 09:49:50,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 09:49:50,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 09:49:50,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 09:49:50,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 09:49:50,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 09:49:50,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 09:49:50,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 09:49:50,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 09:49:50,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 09:49:50,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 09:49:50,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 09:49:50,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 09:49:50,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 09:49:50,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 09:49:50,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 09:49:50,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 09:49:50,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 09:49:50,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 09:49:50,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 09:49:50,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 09:49:50,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 09:49:50,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 09:49:50,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 09:49:50,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 09:49:50,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 09:49:50,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 09:49:50,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 09:49:50,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 09:49:50,563 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 09:49:50,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 09:49:50,564 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 09:49:50,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:49:50,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 09:49:50,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 09:49:50,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 09:49:50,566 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 09:49:50,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 09:49:50,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 09:49:50,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 09:49:50,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 09:49:50,567 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 09:49:50,567 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 09:49:50,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 09:49:50,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 09:49:50,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 09:49:50,770 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 09:49:50,770 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 09:49:50,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2022-01-10 09:49:50,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8b5fa5cb/5c70369f0ad648e3b31ffcb778b3973f/FLAG0c38b9e8d [2022-01-10 09:49:51,180 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 09:49:51,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2022-01-10 09:49:51,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8b5fa5cb/5c70369f0ad648e3b31ffcb778b3973f/FLAG0c38b9e8d [2022-01-10 09:49:51,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8b5fa5cb/5c70369f0ad648e3b31ffcb778b3973f [2022-01-10 09:49:51,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 09:49:51,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 09:49:51,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 09:49:51,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 09:49:51,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 09:49:51,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32483329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51, skipping insertion in model container [2022-01-10 09:49:51,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 09:49:51,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 09:49:51,352 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-01-10 09:49:51,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:49:51,373 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 09:49:51,385 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-01-10 09:49:51,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:49:51,410 INFO L208 MainTranslator]: Completed translation [2022-01-10 09:49:51,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51 WrapperNode [2022-01-10 09:49:51,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 09:49:51,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 09:49:51,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 09:49:51,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 09:49:51,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,442 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-01-10 09:49:51,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 09:49:51,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 09:49:51,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 09:49:51,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 09:49:51,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 09:49:51,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 09:49:51,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 09:49:51,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 09:49:51,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:49:51,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:49:51,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 09:49:51,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 09:49:51,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 09:49:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 09:49:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 09:49:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 09:49:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 09:49:51,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 09:49:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 09:49:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 09:49:51,566 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 09:49:51,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 09:49:51,728 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 09:49:51,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 09:49:51,731 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 09:49:51,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:51 BoogieIcfgContainer [2022-01-10 09:49:51,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 09:49:51,733 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 09:49:51,733 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 09:49:51,748 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 09:49:51,750 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:51" (1/1) ... [2022-01-10 09:49:51,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:49:51 BasicIcfg [2022-01-10 09:49:51,846 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 09:49:51,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 09:49:51,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 09:49:51,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 09:49:51,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:49:51" (1/4) ... [2022-01-10 09:49:51,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5314e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:49:51, skipping insertion in model container [2022-01-10 09:49:51,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:51" (2/4) ... [2022-01-10 09:49:51,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5314e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:49:51, skipping insertion in model container [2022-01-10 09:49:51,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:51" (3/4) ... [2022-01-10 09:49:51,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5314e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:49:51, skipping insertion in model container [2022-01-10 09:49:51,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:49:51" (4/4) ... [2022-01-10 09:49:51,857 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.cTransformedIcfg [2022-01-10 09:49:51,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 09:49:51,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 09:49:51,892 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 09:49:51,897 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 09:49:51,897 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 09:49:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 09:49:51,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:49:51,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:49:51,911 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:49:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:49:51,914 INFO L85 PathProgramCache]: Analyzing trace with hash -377016755, now seen corresponding path program 1 times [2022-01-10 09:49:51,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:49:51,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652868442] [2022-01-10 09:49:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:49:51,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:49:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:49:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 09:49:52,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:49:52,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652868442] [2022-01-10 09:49:52,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652868442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:49:52,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:49:52,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 09:49:52,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503079160] [2022-01-10 09:49:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:49:52,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 09:49:52,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:49:52,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 09:49:52,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:49:52,110 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:49:52,119 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-01-10 09:49:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 09:49:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 09:49:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:49:52,126 INFO L225 Difference]: With dead ends: 32 [2022-01-10 09:49:52,126 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 09:49:52,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:49:52,130 INFO L933 BasicCegarLoop]: 20 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, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:49:52,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:49:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 09:49:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-10 09:49:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-10 09:49:52,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2022-01-10 09:49:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:49:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-10 09:49:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-10 09:49:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 09:49:52,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:49:52,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:49:52,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 09:49:52,151 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:49:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:49:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1394452522, now seen corresponding path program 1 times [2022-01-10 09:49:52,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:49:52,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678984260] [2022-01-10 09:49:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:49:52,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:49:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:49:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 09:49:52,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:49:52,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678984260] [2022-01-10 09:49:52,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678984260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:49:52,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:49:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 09:49:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482984915] [2022-01-10 09:49:52,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:49:52,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 09:49:52,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:49:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 09:49:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 09:49:52,216 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:49:52,266 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-01-10 09:49:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 09:49:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 09:49:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:49:52,267 INFO L225 Difference]: With dead ends: 19 [2022-01-10 09:49:52,267 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 09:49:52,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 09:49:52,269 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:49:52,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:49:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 09:49:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 09:49:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-10 09:49:52,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2022-01-10 09:49:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:49:52,273 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-10 09:49:52,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-10 09:49:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 09:49:52,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:49:52,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:49:52,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 09:49:52,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:49:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:49:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash 68509356, now seen corresponding path program 1 times [2022-01-10 09:49:52,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:49:52,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193262771] [2022-01-10 09:49:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:49:52,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:49:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:49:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 09:49:52,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:49:52,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193262771] [2022-01-10 09:49:52,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193262771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:49:52,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:49:52,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 09:49:52,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649502146] [2022-01-10 09:49:52,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:49:52,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 09:49:52,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:49:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 09:49:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 09:49:52,394 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:49:52,470 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-01-10 09:49:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 09:49:52,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2022-01-10 09:49:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:49:52,472 INFO L225 Difference]: With dead ends: 34 [2022-01-10 09:49:52,472 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 09:49:52,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 09:49:52,473 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:49:52,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:49:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 09:49:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-01-10 09:49:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-10 09:49:52,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-01-10 09:49:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:49:52,476 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-10 09:49:52,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-10 09:49:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 09:49:52,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:49:52,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:49:52,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 09:49:52,477 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:49:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:49:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash 692938832, now seen corresponding path program 1 times [2022-01-10 09:49:52,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:49:52,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729770565] [2022-01-10 09:49:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:49:52,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:49:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:49:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 09:49:52,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:49:52,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729770565] [2022-01-10 09:49:52,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729770565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:49:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313770599] [2022-01-10 09:49:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:49:52,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:49:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:49:52,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 09:49:52,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 09:49:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:49:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 09:49:52,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:49:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:49:52,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:49:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:49:53,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313770599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:49:53,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:49:53,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 12 [2022-01-10 09:49:53,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000725208] [2022-01-10 09:49:53,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:49:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 09:49:53,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:49:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 09:49:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-01-10 09:49:53,037 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:49:53,361 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-01-10 09:49:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 09:49:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 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 16 [2022-01-10 09:49:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:49:53,362 INFO L225 Difference]: With dead ends: 47 [2022-01-10 09:49:53,362 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 09:49:53,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-10 09:49:53,363 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 09:49:53,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 15 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 09:49:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 09:49:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 09:49:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-10 09:49:53,368 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 16 [2022-01-10 09:49:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:49:53,369 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-10 09:49:53,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:49:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-10 09:49:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 09:49:53,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:49:53,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:49:53,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 09:49:53,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:49:53,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:49:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:49:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash -573133374, now seen corresponding path program 2 times [2022-01-10 09:49:53,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:49:53,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886515107] [2022-01-10 09:49:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:49:53,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:49:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:49:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 09:49:53,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:49:53,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886515107] [2022-01-10 09:49:53,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886515107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:49:53,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38660013] [2022-01-10 09:49:53,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 09:49:53,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:49:53,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:49:53,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 09:49:53,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 09:49:54,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 09:49:54,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:49:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-10 09:49:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:49:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 09:49:54,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:50:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 09:50:06,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38660013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:50:06,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:50:06,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12] total 24 [2022-01-10 09:50:06,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535866278] [2022-01-10 09:50:06,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:50:06,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 09:50:06,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:50:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 09:50:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=418, Unknown=3, NotChecked=0, Total=600 [2022-01-10 09:50:06,042 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:50:13,898 WARN L228 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 09:50:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:50:22,406 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2022-01-10 09:50:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 09:50:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-10 09:50:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:50:22,407 INFO L225 Difference]: With dead ends: 95 [2022-01-10 09:50:22,408 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 09:50:22,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=272, Invalid=593, Unknown=5, NotChecked=0, Total=870 [2022-01-10 09:50:22,410 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-10 09:50:22,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 30 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-10 09:50:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 09:50:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-10 09:50:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:50:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-01-10 09:50:22,425 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 34 [2022-01-10 09:50:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:50:22,425 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-01-10 09:50:22,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:50:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-01-10 09:50:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 09:50:22,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:50:22,428 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:50:22,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 09:50:22,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:50:22,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:50:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:50:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash -606204122, now seen corresponding path program 3 times [2022-01-10 09:50:22,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:50:22,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454303143] [2022-01-10 09:50:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:50:22,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:50:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:50:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-10 09:50:23,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:50:23,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454303143] [2022-01-10 09:50:23,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454303143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:50:23,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739955516] [2022-01-10 09:50:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 09:50:23,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:50:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:50:23,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 09:50:23,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process