/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:14:03,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:14:03,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:14:03,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:14:03,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:14:03,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:14:03,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:14:03,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:14:03,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:14:03,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:14:03,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:14:03,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:14:03,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:14:03,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:14:03,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:14:03,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:14:03,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:14:03,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:14:03,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:14:03,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:14:03,294 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:14:03,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:14:03,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:14:03,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:14:03,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:14:03,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 20:14:03,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 20:14:03,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 20:14:03,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 20:14:03,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 20:14:03,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 20:14:03,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 20:14:03,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 20:14:03,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 20:14:03,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 20:14:03,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 20:14:03,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 20:14:03,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 20:14:03,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 20:14:03,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:14:03,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:14:03,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:14:03,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:14:03,339 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:14:03,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:14:03,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:14:03,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:14:03,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:14:03,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:14:03,342 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:14:03,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:14:03,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:14:03,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:14:03,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:14:03,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:14:03,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:14:03,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:14:03,346 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:14:03,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:14:03,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:14:03,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:14:03,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:14:03,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:14:03,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:14:03,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:14:03,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:14:03,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:14:03,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:14:03,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:14:03,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:14:03,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:14:03,349 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:14:03,349 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:14:03,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:14:03,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:14:03,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:14:03,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:14:03,563 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:14:03,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-17 20:14:03,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8810ec4c4/e945c0d3d94f4d328cc9e2043c89f94b/FLAG11dacb204 [2022-03-17 20:14:03,931 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:14:03,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-17 20:14:03,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8810ec4c4/e945c0d3d94f4d328cc9e2043c89f94b/FLAG11dacb204 [2022-03-17 20:14:04,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8810ec4c4/e945c0d3d94f4d328cc9e2043c89f94b [2022-03-17 20:14:04,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:14:04,368 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:14:04,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:14:04,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:14:04,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:14:04,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e078a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04, skipping insertion in model container [2022-03-17 20:14:04,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:14:04,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:14:04,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-17 20:14:04,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:14:04,580 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:14:04,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-17 20:14:04,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:14:04,605 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:14:04,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04 WrapperNode [2022-03-17 20:14:04,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:14:04,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:14:04,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:14:04,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:14:04,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:14:04,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:14:04,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:14:04,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:14:04,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (1/1) ... [2022-03-17 20:14:04,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:14:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:14:04,663 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) [2022-03-17 20:14:04,692 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 [2022-03-17 20:14:04,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:14:04,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:14:04,707 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:14:04,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:14:04,707 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-17 20:14:04,708 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-17 20:14:04,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:14:04,708 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:14:04,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:14:04,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:14:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:14:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 20:14:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:14:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-17 20:14:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-17 20:14:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:14:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:14:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:14:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:14:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:14:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:14:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:14:04,777 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:14:04,778 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:14:04,907 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:14:04,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:14:04,912 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-17 20:14:04,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:14:04 BoogieIcfgContainer [2022-03-17 20:14:04,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:14:04,914 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:14:04,914 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:14:04,915 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:14:04,917 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:14:04" (1/1) ... [2022-03-17 20:15:46,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:15:46 BasicIcfg [2022-03-17 20:15:46,836 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:15:46,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:15:46,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:15:46,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:15:46,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:14:04" (1/4) ... [2022-03-17 20:15:46,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfc4038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:15:46, skipping insertion in model container [2022-03-17 20:15:46,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:14:04" (2/4) ... [2022-03-17 20:15:46,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfc4038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:15:46, skipping insertion in model container [2022-03-17 20:15:46,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:14:04" (3/4) ... [2022-03-17 20:15:46,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfc4038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:15:46, skipping insertion in model container [2022-03-17 20:15:46,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:15:46" (4/4) ... [2022-03-17 20:15:46,850 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.cqvasr [2022-03-17 20:15:46,854 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:15:46,854 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:15:46,896 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:15:46,901 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-17 20:15:46,901 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:15:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 20:15:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 20:15:46,916 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:15:46,917 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:15:46,917 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:15:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:15:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1121522138, now seen corresponding path program 1 times [2022-03-17 20:15:46,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:15:46,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961791319] [2022-03-17 20:15:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:15:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:15:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:15:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:15:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:15:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961791319] [2022-03-17 20:15:47,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961791319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:15:47,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:15:47,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:15:47,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720928890] [2022-03-17 20:15:47,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:15:47,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:15:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:15:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:15:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:15:47,151 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:15:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:15:47,318 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-17 20:15:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:15:47,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 20:15:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:15:47,325 INFO L225 Difference]: With dead ends: 76 [2022-03-17 20:15:47,325 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 20:15:47,329 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:15:47,333 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:15:47,333 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 55 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:15:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 20:15:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 20:15:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:15:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-17 20:15:47,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-03-17 20:15:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:15:47,364 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-17 20:15:47,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:15:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-17 20:15:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 20:15:47,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:15:47,365 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:15:47,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:15:47,366 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:15:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:15:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1342094697, now seen corresponding path program 1 times [2022-03-17 20:15:47,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:15:47,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273822400] [2022-03-17 20:15:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:15:47,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:15:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:15:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 20:15:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 20:15:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:15:47,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:15:47,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273822400] [2022-03-17 20:15:47,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273822400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:15:47,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:15:47,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-17 20:15:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902303026] [2022-03-17 20:15:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:15:47,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 20:15:47,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:15:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 20:15:47,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-17 20:15:47,542 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:15:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:15:47,854 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-17 20:15:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 20:15:47,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-17 20:15:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:15:47,857 INFO L225 Difference]: With dead ends: 50 [2022-03-17 20:15:47,857 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 20:15:47,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-17 20:15:47,859 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:15:47,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 76 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:15:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 20:15:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-17 20:15:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-17 20:15:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-17 20:15:47,870 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-03-17 20:15:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:15:47,870 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-17 20:15:47,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:15:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-17 20:15:47,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 20:15:47,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:15:47,872 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:15:47,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 20:15:47,872 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:15:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:15:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1260090278, now seen corresponding path program 1 times [2022-03-17 20:15:47,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:15:47,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133524086] [2022-03-17 20:15:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:15:47,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:15:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:15:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 20:15:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 20:15:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 20:15:47,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:15:47,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133524086] [2022-03-17 20:15:47,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133524086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:15:47,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:15:47,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:15:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816832344] [2022-03-17 20:15:47,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:15:47,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:15:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:15:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:15:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:15:47,941 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:15:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:15:48,035 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-03-17 20:15:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:15:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-17 20:15:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:15:48,037 INFO L225 Difference]: With dead ends: 75 [2022-03-17 20:15:48,037 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 20:15:48,037 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:15:48,039 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:15:48,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:15:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 20:15:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-17 20:15:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-17 20:15:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-03-17 20:15:48,046 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2022-03-17 20:15:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:15:48,047 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-03-17 20:15:48,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:15:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-03-17 20:15:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 20:15:48,048 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:15:48,048 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:15:48,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 20:15:48,048 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:15:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:15:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1007047745, now seen corresponding path program 1 times [2022-03-17 20:15:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:15:48,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149634627] [2022-03-17 20:15:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:15:48,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:15:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:48,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:15:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:48,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 20:15:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:48,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-17 20:15:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 20:15:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:15:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149634627] [2022-03-17 20:15:48,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149634627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:15:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212956471] [2022-03-17 20:15:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:15:48,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:15:48,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:15:48,151 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) [2022-03-17 20:15:48,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:15:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:15:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 20:15:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:15:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 20:15:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:15:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 20:15:48,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212956471] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 20:15:48,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:15:48,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 8 [2022-03-17 20:15:48,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814200138] [2022-03-17 20:15:48,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:15:48,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:15:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:15:48,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:15:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:15:48,365 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:15:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:15:48,380 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-03-17 20:15:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:15:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-17 20:15:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:15:48,381 INFO L225 Difference]: With dead ends: 43 [2022-03-17 20:15:48,381 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 20:15:48,382 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:15:48,382 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:15:48,383 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:15:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 20:15:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 20:15:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-03-17 20:15:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 20:15:48,384 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2022-03-17 20:15:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:15:48,384 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 20:15:48,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:15:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 20:15:48,384 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 20:15:48,387 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 20:15:48,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:15:48,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:15:48,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 20:15:48,671 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 20:15:48,671 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:15:48,671 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:15:48,671 INFO L885 garLoopResultBuilder]: At program point correct_versionENTRY(lines 34 59) the Hoare annotation is: true [2022-03-17 20:15:48,671 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 42) the Hoare annotation is: (or (<= |correct_version_#in~a| 0) (and (<= correct_version_~b~0 0) (= |correct_version_#in~n| correct_version_~n) (not (<= correct_version_~a 0)))) [2022-03-17 20:15:48,671 INFO L882 garLoopResultBuilder]: For program point L44-1(lines 35 59) no Hoare annotation was computed. [2022-03-17 20:15:48,672 INFO L882 garLoopResultBuilder]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2022-03-17 20:15:48,672 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 52 56) the Hoare annotation is: (or (<= |correct_version_#in~a| 0) (and (<= correct_version_~b~0 0) (<= |correct_version_#in~n| 0) (= |correct_version_#in~n| correct_version_~n))) [2022-03-17 20:15:48,672 INFO L882 garLoopResultBuilder]: For program point L52-3(lines 52 56) no Hoare annotation was computed. [2022-03-17 20:15:48,672 INFO L882 garLoopResultBuilder]: For program point correct_versionFINAL(lines 34 59) no Hoare annotation was computed. [2022-03-17 20:15:48,672 INFO L882 garLoopResultBuilder]: For program point correct_versionEXIT(lines 34 59) no Hoare annotation was computed. [2022-03-17 20:15:48,672 INFO L885 garLoopResultBuilder]: At program point student_versionENTRY(lines 61 86) the Hoare annotation is: true [2022-03-17 20:15:48,672 INFO L885 garLoopResultBuilder]: At program point L65-2(lines 65 69) the Hoare annotation is: true [2022-03-17 20:15:48,672 INFO L882 garLoopResultBuilder]: For program point L71-1(lines 62 86) no Hoare annotation was computed. [2022-03-17 20:15:48,672 INFO L882 garLoopResultBuilder]: For program point L71-2(lines 71 75) no Hoare annotation was computed. [2022-03-17 20:15:48,673 INFO L885 garLoopResultBuilder]: At program point L79-2(lines 79 83) the Hoare annotation is: true [2022-03-17 20:15:48,673 INFO L882 garLoopResultBuilder]: For program point L79-3(lines 79 83) no Hoare annotation was computed. [2022-03-17 20:15:48,673 INFO L882 garLoopResultBuilder]: For program point student_versionFINAL(lines 61 86) no Hoare annotation was computed. [2022-03-17 20:15:48,673 INFO L882 garLoopResultBuilder]: For program point student_versionEXIT(lines 61 86) no Hoare annotation was computed. [2022-03-17 20:15:48,673 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 20:15:48,673 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 20:15:48,673 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:15:48,673 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:15:48,673 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 88 109) the Hoare annotation is: true [2022-03-17 20:15:48,674 INFO L882 garLoopResultBuilder]: For program point L97(lines 97 106) no Hoare annotation was computed. [2022-03-17 20:15:48,674 INFO L878 garLoopResultBuilder]: At program point L104(line 104) the Hoare annotation is: (and (<= 1 main_~n~0) (= main_~n_stones2~0 main_~n_stones1~0) (<= 1 main_~a~0)) [2022-03-17 20:15:48,674 INFO L878 garLoopResultBuilder]: At program point L97-2(lines 97 106) the Hoare annotation is: (= main_~n_stones2~0 main_~n_stones1~0) [2022-03-17 20:15:48,674 INFO L882 garLoopResultBuilder]: For program point L104-1(line 104) no Hoare annotation was computed. [2022-03-17 20:15:48,674 INFO L882 garLoopResultBuilder]: For program point L107(line 107) no Hoare annotation was computed. [2022-03-17 20:15:48,674 INFO L878 garLoopResultBuilder]: At program point L105(line 105) the Hoare annotation is: false [2022-03-17 20:15:48,674 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 88 109) no Hoare annotation was computed. [2022-03-17 20:15:48,674 INFO L882 garLoopResultBuilder]: For program point L105-1(line 105) no Hoare annotation was computed. [2022-03-17 20:15:48,674 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 88 109) no Hoare annotation was computed. [2022-03-17 20:15:48,675 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-17 20:15:48,675 INFO L882 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-03-17 20:15:48,675 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-17 20:15:48,675 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2022-03-17 20:15:48,675 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-03-17 20:15:48,675 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2022-03-17 20:15:48,678 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-03-17 20:15:48,679 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 20:15:48,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:15:48 BasicIcfg [2022-03-17 20:15:48,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 20:15:48,692 INFO L158 Benchmark]: Toolchain (without parser) took 104323.24ms. Allocated memory was 168.8MB in the beginning and 210.8MB in the end (delta: 41.9MB). Free memory was 141.2MB in the beginning and 152.7MB in the end (delta: -11.4MB). Peak memory consumption was 30.1MB. Max. memory is 8.0GB. [2022-03-17 20:15:48,692 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 168.8MB. Free memory is still 125.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:15:48,692 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.64ms. Allocated memory was 168.8MB in the beginning and 210.8MB in the end (delta: 41.9MB). Free memory was 141.0MB in the beginning and 182.2MB in the end (delta: -41.2MB). Peak memory consumption was 7.2MB. Max. memory is 8.0GB. [2022-03-17 20:15:48,693 INFO L158 Benchmark]: Boogie Preprocessor took 31.03ms. Allocated memory is still 210.8MB. Free memory was 182.2MB in the beginning and 180.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 20:15:48,693 INFO L158 Benchmark]: RCFGBuilder took 275.27ms. Allocated memory is still 210.8MB. Free memory was 180.5MB in the beginning and 168.6MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 20:15:48,693 INFO L158 Benchmark]: IcfgTransformer took 101922.00ms. Allocated memory is still 210.8MB. Free memory was 168.6MB in the beginning and 153.6MB in the end (delta: 15.0MB). Peak memory consumption was 85.3MB. Max. memory is 8.0GB. [2022-03-17 20:15:48,693 INFO L158 Benchmark]: TraceAbstraction took 1854.38ms. Allocated memory is still 210.8MB. Free memory was 153.0MB in the beginning and 152.7MB in the end (delta: 379.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:15:48,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 168.8MB. Free memory is still 125.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 234.64ms. Allocated memory was 168.8MB in the beginning and 210.8MB in the end (delta: 41.9MB). Free memory was 141.0MB in the beginning and 182.2MB in the end (delta: -41.2MB). Peak memory consumption was 7.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.03ms. Allocated memory is still 210.8MB. Free memory was 182.2MB in the beginning and 180.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 275.27ms. Allocated memory is still 210.8MB. Free memory was 180.5MB in the beginning and 168.6MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 101922.00ms. Allocated memory is still 210.8MB. Free memory was 168.6MB in the beginning and 153.6MB in the end (delta: 15.0MB). Peak memory consumption was 85.3MB. Max. memory is 8.0GB. * TraceAbstraction took 1854.38ms. Allocated memory is still 210.8MB. Free memory was 153.0MB in the beginning and 152.7MB in the end (delta: 379.7kB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 144 mSDsluCounter, 218 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 120 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 578 IncrementalHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 101 mSDtfsCounter, 578 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 30 PreInvPairs, 37 NumberOfFragments, 58 HoareAnnotationTreeSize, 30 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 38 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 339 SizeOfPredicates, 1 NumberOfNonLiveVariables, 160 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 5/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: \old(a) <= 0 || ((b <= 0 && \old(n) <= 0) && \old(n) == n) - InvariantResult [Line: 65]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: \old(a) <= 0 || ((b <= 0 && \old(n) == n) && !(a <= 0)) RESULT: Ultimate proved your program to be correct! [2022-03-17 20:15:48,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...