/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/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:20:58,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:20:58,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:20:58,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:20:58,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:20:58,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:20:58,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:20:58,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:20:58,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:20:58,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:20:58,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:20:58,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:20:58,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:20:58,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:20:58,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:20:58,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:20:58,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:20:58,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:20:58,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:20:58,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:20:58,151 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:20:58,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:20:58,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:20:58,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:20:58,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:20:58,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 19:20:58,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 19:20:58,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 19:20:58,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 19:20:58,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 19:20:58,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 19:20:58,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 19:20:58,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 19:20:58,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 19:20:58,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 19:20:58,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 19:20:58,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 19:20:58,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 19:20:58,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 19:20:58,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:20:58,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:20:58,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:20:58,163 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 19:20:58,180 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:20:58,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:20:58,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:20:58,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:20:58,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:20:58,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:20:58,182 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:20:58,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:20:58,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:20:58,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:20:58,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:20:58,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:20:58,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:20:58,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:20:58,183 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:20:58,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:20:58,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:20:58,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:20:58,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:20:58,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:58,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:20:58,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:20:58,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:20:58,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:20:58,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:20:58,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:20:58,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:20:58,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:20:58,193 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:20:58,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:20:58,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:20:58,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:20:58,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:20:58,371 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:20:58,372 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:20:58,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2022-03-17 19:20:58,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529608f5a/32847e46966a439cb8554b08b7dd86fe/FLAG4acea03e4 [2022-03-17 19:20:58,767 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:20:58,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2022-03-17 19:20:58,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529608f5a/32847e46966a439cb8554b08b7dd86fe/FLAG4acea03e4 [2022-03-17 19:20:59,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529608f5a/32847e46966a439cb8554b08b7dd86fe [2022-03-17 19:20:59,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:20:59,207 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:20:59,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:59,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:20:59,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:20:59,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc0797c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59, skipping insertion in model container [2022-03-17 19:20:59,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:20:59,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:20:59,339 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/sum04-2.i[808,821] [2022-03-17 19:20:59,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:59,351 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:20:59,360 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/sum04-2.i[808,821] [2022-03-17 19:20:59,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:59,370 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:20:59,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59 WrapperNode [2022-03-17 19:20:59,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:59,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:20:59,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:20:59,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:20:59,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:20:59,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:20:59,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:20:59,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:20:59,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:59,416 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 19:20:59,423 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 19:20:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:20:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:20:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:20:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:20:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:20:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:20:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:20:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:20:59,486 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:20:59,487 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:20:59,565 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:20:59,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:20:59,570 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:20:59,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:59 BoogieIcfgContainer [2022-03-17 19:20:59,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:20:59,571 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:20:59,571 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:20:59,573 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:20:59,575 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:59" (1/1) ... [2022-03-17 19:20:59,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:59 BasicIcfg [2022-03-17 19:20:59,585 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:20:59,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:20:59,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:20:59,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:20:59,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:20:59" (1/4) ... [2022-03-17 19:20:59,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa6461d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:59, skipping insertion in model container [2022-03-17 19:20:59,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:59" (2/4) ... [2022-03-17 19:20:59,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa6461d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:59, skipping insertion in model container [2022-03-17 19:20:59,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:59" (3/4) ... [2022-03-17 19:20:59,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa6461d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:20:59, skipping insertion in model container [2022-03-17 19:20:59,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:59" (4/4) ... [2022-03-17 19:20:59,608 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.iqvasr [2022-03-17 19:20:59,611 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:20:59,611 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:20:59,641 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:20:59,645 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 19:20:59,646 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:20:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:20:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:20:59,669 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:59,670 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:59,670 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1795998501, now seen corresponding path program 1 times [2022-03-17 19:20:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:59,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015751682] [2022-03-17 19:20:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:59,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:59,817 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 19:20:59,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:59,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015751682] [2022-03-17 19:20:59,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015751682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:59,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:59,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:20:59,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180182971] [2022-03-17 19:20:59,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:59,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:20:59,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:59,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:20:59,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:20:59,840 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 19:20:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:59,862 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-17 19:20:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:20:59,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 19:20:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:59,867 INFO L225 Difference]: With dead ends: 30 [2022-03-17 19:20:59,868 INFO L226 Difference]: Without dead ends: 13 [2022-03-17 19:20:59,870 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:20:59,872 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:59,873 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:20:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-17 19:20:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-17 19:20:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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 19:20:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-03-17 19:20:59,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-03-17 19:20:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:59,893 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-03-17 19:20:59,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 19:20:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-03-17 19:20:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:20:59,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:59,894 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:59,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:20:59,894 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1796922022, now seen corresponding path program 1 times [2022-03-17 19:20:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590952127] [2022-03-17 19:20:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:59,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:59,932 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 19:20:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590952127] [2022-03-17 19:20:59,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590952127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:59,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:59,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:20:59,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558344615] [2022-03-17 19:20:59,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:59,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:20:59,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:20:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:20:59,936 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 19:20:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:59,957 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-03-17 19:20:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:20:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 19:20:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:59,958 INFO L225 Difference]: With dead ends: 20 [2022-03-17 19:20:59,958 INFO L226 Difference]: Without dead ends: 15 [2022-03-17 19:20:59,959 INFO L911 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 [2022-03-17 19:20:59,959 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:59,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:20:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-17 19:20:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-17 19:20:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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 19:20:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-17 19:20:59,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-17 19:20:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:59,964 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-17 19:20:59,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 19:20:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-17 19:20:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:20:59,964 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:59,964 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:59,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:20:59,965 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1176605188, now seen corresponding path program 1 times [2022-03-17 19:20:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:59,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60989766] [2022-03-17 19:20:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:00,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60989766] [2022-03-17 19:21:00,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60989766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450419483] [2022-03-17 19:21:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:00,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:00,038 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 19:21:00,039 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 19:21:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 19:21:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:00,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450419483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:00,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:00,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 19:21:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747422642] [2022-03-17 19:21:00,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:00,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 19:21:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 19:21:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:21:00,208 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:00,268 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-03-17 19:21:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 19:21:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 19:21:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:00,269 INFO L225 Difference]: With dead ends: 25 [2022-03-17 19:21:00,269 INFO L226 Difference]: Without dead ends: 20 [2022-03-17 19:21:00,269 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:21:00,273 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:00,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-17 19:21:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-17 19:21:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 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 19:21:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-17 19:21:00,276 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-03-17 19:21:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:00,277 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-17 19:21:00,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-17 19:21:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-17 19:21:00,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:00,277 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:00,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 19:21:00,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:00,478 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2042821406, now seen corresponding path program 2 times [2022-03-17 19:21:00,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:00,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040527763] [2022-03-17 19:21:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040527763] [2022-03-17 19:21:00,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040527763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822471770] [2022-03-17 19:21:00,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:21:00,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:00,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:00,568 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) [2022-03-17 19:21:00,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:21:00,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:21:00,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 19:21:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:00,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:00,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822471770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:00,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:00,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-17 19:21:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772641153] [2022-03-17 19:21:00,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:00,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 19:21:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 19:21:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:21:00,740 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:00,837 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-03-17 19:21:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 19:21:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-17 19:21:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:00,840 INFO L225 Difference]: With dead ends: 33 [2022-03-17 19:21:00,840 INFO L226 Difference]: Without dead ends: 28 [2022-03-17 19:21:00,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-17 19:21:00,843 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:00,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-17 19:21:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-17 19:21:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 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 19:21:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-03-17 19:21:00,851 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2022-03-17 19:21:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:00,852 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-03-17 19:21:00,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-03-17 19:21:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 19:21:00,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:00,852 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:00,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:01,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 19:21:01,060 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:01,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1851728790, now seen corresponding path program 3 times [2022-03-17 19:21:01,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:01,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927019500] [2022-03-17 19:21:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:01,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:01,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927019500] [2022-03-17 19:21:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927019500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974434830] [2022-03-17 19:21:01,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:21:01,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:01,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:01,221 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) [2022-03-17 19:21:01,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:21:01,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-17 19:21:01,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 19:21:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:01,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:01,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974434830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:01,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:01,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-03-17 19:21:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272724054] [2022-03-17 19:21:01,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:01,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 19:21:01,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 19:21:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-03-17 19:21:01,647 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:01,925 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-03-17 19:21:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 19:21:01,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 19:21:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:01,926 INFO L225 Difference]: With dead ends: 35 [2022-03-17 19:21:01,926 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 19:21:01,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 19:21:01,927 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:01,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:21:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 19:21:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 19:21:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 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 19:21:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-03-17 19:21:01,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-03-17 19:21:01,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:01,931 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-03-17 19:21:01,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-03-17 19:21:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 19:21:01,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:01,932 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:01,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:02,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:02,148 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1988665612, now seen corresponding path program 4 times [2022-03-17 19:21:02,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:02,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130978678] [2022-03-17 19:21:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:02,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:02,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130978678] [2022-03-17 19:21:02,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130978678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017586602] [2022-03-17 19:21:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:21:02,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:02,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:02,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:02,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 19:21:02,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:21:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 19:21:02,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:02,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:21:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017586602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:02,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:21:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 13 [2022-03-17 19:21:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909537778] [2022-03-17 19:21:02,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:02,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 19:21:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 19:21:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-17 19:21:02,338 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 19:21:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:02,360 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-17 19:21:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 19:21:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 29 [2022-03-17 19:21:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:02,361 INFO L225 Difference]: With dead ends: 30 [2022-03-17 19:21:02,361 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 19:21:02,361 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-17 19:21:02,362 INFO L912 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:02,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 19:21:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 19:21:02,363 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 19:21:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 19:21:02,363 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-03-17 19:21:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:02,363 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 19:21:02,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 19:21:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 19:21:02,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 19:21:02,365 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 19:21:02,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:02,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:02,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 19:21:02,621 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 19:21:02,621 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 19:21:02,622 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 19:21:02,622 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 19:21:02,622 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 19:21:02,622 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 19:21:02,622 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 19:21:02,622 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2022-03-17 19:21:02,622 INFO L878 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= main_~sn~0 16) (<= 9 main_~i~0) (< 15 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= main_~i~0 4) (<= 4 main_~i~0)) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= 7 main_~i~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= main_~i~0 6) (<= 6 main_~i~0)) (and (<= 4 main_~sn~0) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= main_~i~0 2) (<= 2 main_~sn~0)) (and (<= main_~i~0 5) (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8))) [2022-03-17 19:21:02,622 INFO L878 garLoopResultBuilder]: At program point L24-4(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2022-03-17 19:21:02,622 INFO L882 garLoopResultBuilder]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2022-03-17 19:21:02,622 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 28) no Hoare annotation was computed. [2022-03-17 19:21:02,622 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 28) no Hoare annotation was computed. [2022-03-17 19:21:02,622 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-03-17 19:21:02,622 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2022-03-17 19:21:02,623 INFO L882 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-03-17 19:21:02,623 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2022-03-17 19:21:02,623 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-17 19:21:02,623 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2022-03-17 19:21:02,625 INFO L718 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-03-17 19:21:02,626 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 19:21:02,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:21:02 BasicIcfg [2022-03-17 19:21:02,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 19:21:02,636 INFO L158 Benchmark]: Toolchain (without parser) took 3428.76ms. Allocated memory was 185.6MB in the beginning and 282.1MB in the end (delta: 96.5MB). Free memory was 128.8MB in the beginning and 228.7MB in the end (delta: -99.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:21:02,636 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:21:02,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.00ms. Allocated memory was 185.6MB in the beginning and 282.1MB in the end (delta: 96.5MB). Free memory was 128.6MB in the beginning and 251.7MB in the end (delta: -123.1MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-03-17 19:21:02,636 INFO L158 Benchmark]: Boogie Preprocessor took 20.59ms. Allocated memory is still 282.1MB. Free memory was 251.7MB in the beginning and 250.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:21:02,636 INFO L158 Benchmark]: RCFGBuilder took 177.72ms. Allocated memory is still 282.1MB. Free memory was 250.3MB in the beginning and 240.7MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 19:21:02,637 INFO L158 Benchmark]: IcfgTransformer took 13.54ms. Allocated memory is still 282.1MB. Free memory was 240.3MB in the beginning and 239.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:21:02,637 INFO L158 Benchmark]: TraceAbstraction took 3032.44ms. Allocated memory is still 282.1MB. Free memory was 238.8MB in the beginning and 228.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-03-17 19:21:02,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 163.00ms. Allocated memory was 185.6MB in the beginning and 282.1MB in the end (delta: 96.5MB). Free memory was 128.6MB in the beginning and 251.7MB in the end (delta: -123.1MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.59ms. Allocated memory is still 282.1MB. Free memory was 251.7MB in the beginning and 250.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 177.72ms. Allocated memory is still 282.1MB. Free memory was 250.3MB in the beginning and 240.7MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 13.54ms. Allocated memory is still 282.1MB. Free memory was 240.3MB in the beginning and 239.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3032.44ms. Allocated memory is still 282.1MB. Free memory was 238.8MB in the beginning and 228.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.9MB. 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: 16]: 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 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 77 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 211 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 136 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 472 IncrementalHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 75 mSDtfsCounter, 472 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 219 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, InterpolantAutomatonStates: 50, 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, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 22 NumberOfFragments, 127 HoareAnnotationTreeSize, 12 FomulaSimplifications, 11 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 198 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 826 SizeOfPredicates, 1 NumberOfNonLiveVariables, 283 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 147/405 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: 24]: Loop Invariant Derived loop invariant: (((((((((sn <= 16 && 9 <= i) && 15 < sn) || (((6 <= sn && sn <= 6) && i <= 4) && 4 <= i)) || (sn == 0 && i == 1)) || (((i <= 7 && 12 <= sn) && sn <= 12) && 7 <= i)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((sn <= 10 && 10 <= sn) && i <= 6) && 6 <= i)) || (((4 <= sn && sn <= 4) && 3 <= i) && i <= 3)) || (((2 <= i && sn <= 2) && i <= 2) && 2 <= sn)) || (((i <= 5 && 8 <= sn) && 5 <= i) && sn <= 8) RESULT: Ultimate proved your program to be correct! [2022-03-17 19:21:02,663 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...