/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/loop-simple/nested_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:40:26,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:40:26,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:40:26,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:40:26,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:40:26,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:40:26,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:40:26,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:40:26,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:40:26,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:40:26,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:40:26,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:40:26,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:40:26,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:40:26,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:40:26,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:40:26,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:40:26,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:40:26,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:40:26,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:40:26,917 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:40:26,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:40:26,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:40:26,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:40:26,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:40:26,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 22:40:26,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 22:40:26,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 22:40:26,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 22:40:26,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 22:40:26,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 22:40:26,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 22:40:26,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 22:40:26,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 22:40:26,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 22:40:26,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 22:40:26,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 22:40:26,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 22:40:26,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 22:40:26,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:40:26,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:40:26,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:40:26,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:40:26,953 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:40:26,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:40:26,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:40:26,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:40:26,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:40:26,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:40:26,954 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:40:26,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:40:26,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:40:26,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:40:26,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:40:26,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:40:26,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:40:26,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:40:26,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:40:26,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:40:26,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:40:26,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:40:26,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:40:26,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:40:26,958 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:40:26,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:40:27,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:40:27,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:40:27,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:40:27,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:40:27,180 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:40:27,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_3.c [2022-03-18 22:40:27,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b68f346e/e07452c132014ee0b803b5c87fc0494d/FLAGef388bc98 [2022-03-18 22:40:27,620 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:40:27,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c [2022-03-18 22:40:27,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b68f346e/e07452c132014ee0b803b5c87fc0494d/FLAGef388bc98 [2022-03-18 22:40:27,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b68f346e/e07452c132014ee0b803b5c87fc0494d [2022-03-18 22:40:27,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:40:27,641 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:40:27,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:40:27,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:40:27,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:40:27,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3772c75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27, skipping insertion in model container [2022-03-18 22:40:27,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:40:27,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:40:27,771 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c[784,797] [2022-03-18 22:40:27,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:40:27,778 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:40:27,789 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c[784,797] [2022-03-18 22:40:27,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:40:27,798 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:40:27,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27 WrapperNode [2022-03-18 22:40:27,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:40:27,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:40:27,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:40:27,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:40:27,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:40:27,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:40:27,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:40:27,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:40:27,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (1/1) ... [2022-03-18 22:40:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:40:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:27,869 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) [2022-03-18 22:40:27,878 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 [2022-03-18 22:40:27,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:40:27,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:40:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:40:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:40:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:40:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:40:27,936 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:40:27,937 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:40:28,068 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:40:28,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:40:28,073 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 22:40:28,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:40:28 BoogieIcfgContainer [2022-03-18 22:40:28,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:40:28,075 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:40:28,075 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:40:28,076 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:40:28,093 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:40:28" (1/1) ... [2022-03-18 22:40:28,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:40:28 BasicIcfg [2022-03-18 22:40:28,103 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:40:28,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:40:28,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:40:28,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:40:28,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:40:27" (1/4) ... [2022-03-18 22:40:28,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711b7daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:40:28, skipping insertion in model container [2022-03-18 22:40:28,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:40:27" (2/4) ... [2022-03-18 22:40:28,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711b7daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:40:28, skipping insertion in model container [2022-03-18 22:40:28,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:40:28" (3/4) ... [2022-03-18 22:40:28,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711b7daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:40:28, skipping insertion in model container [2022-03-18 22:40:28,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:40:28" (4/4) ... [2022-03-18 22:40:28,109 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.cqvasr [2022-03-18 22:40:28,125 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:40:28,125 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:40:28,168 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:40:28,173 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 [2022-03-18 22:40:28,173 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:40:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 22:40:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-18 22:40:28,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:28,216 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:28,216 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1420630675, now seen corresponding path program 1 times [2022-03-18 22:40:28,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:28,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497110930] [2022-03-18 22:40:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:28,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497110930] [2022-03-18 22:40:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497110930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:40:28,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:40:28,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:40:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97014849] [2022-03-18 22:40:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:40:28,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:40:28,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:40:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:40:28,382 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:28,412 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-03-18 22:40:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:40:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-18 22:40:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:28,422 INFO L225 Difference]: With dead ends: 34 [2022-03-18 22:40:28,423 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 22:40:28,425 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 [2022-03-18 22:40:28,431 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:28,431 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 22:40:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 22:40:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-03-18 22:40:28,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-03-18 22:40:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:28,460 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-03-18 22:40:28,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-03-18 22:40:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-18 22:40:28,461 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:28,461 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:28,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:40:28,462 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:28,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1420629714, now seen corresponding path program 1 times [2022-03-18 22:40:28,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:28,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953109114] [2022-03-18 22:40:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:28,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:28,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953109114] [2022-03-18 22:40:28,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953109114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:40:28,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:40:28,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 22:40:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453895375] [2022-03-18 22:40:28,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:40:28,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 22:40:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 22:40:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 22:40:28,533 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:28,566 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-03-18 22:40:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 22:40:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-18 22:40:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:28,568 INFO L225 Difference]: With dead ends: 24 [2022-03-18 22:40:28,568 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 22:40:28,571 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:40:28,574 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:28,574 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 22:40:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-03-18 22:40:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-18 22:40:28,584 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-03-18 22:40:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:28,584 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-18 22:40:28,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-18 22:40:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 22:40:28,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:28,585 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:28,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:40:28,586 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash 659479704, now seen corresponding path program 1 times [2022-03-18 22:40:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:28,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60678879] [2022-03-18 22:40:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:28,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60678879] [2022-03-18 22:40:28,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60678879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:40:28,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:40:28,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 22:40:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14022553] [2022-03-18 22:40:28,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:40:28,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 22:40:28,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 22:40:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 22:40:28,659 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:28,688 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-03-18 22:40:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 22:40:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 22:40:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:28,689 INFO L225 Difference]: With dead ends: 29 [2022-03-18 22:40:28,689 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 22:40:28,690 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:40:28,690 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:28,691 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 22:40:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-03-18 22:40:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 22:40:28,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-03-18 22:40:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:28,694 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 22:40:28,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 22:40:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 22:40:28,695 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:28,695 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:28,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 22:40:28,695 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1034663169, now seen corresponding path program 1 times [2022-03-18 22:40:28,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:28,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074752887] [2022-03-18 22:40:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:28,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:28,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074752887] [2022-03-18 22:40:28,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074752887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:40:28,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:40:28,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 22:40:28,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892584361] [2022-03-18 22:40:28,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:40:28,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 22:40:28,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:28,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 22:40:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 22:40:28,732 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:28,754 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-03-18 22:40:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 22:40:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 22:40:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:28,755 INFO L225 Difference]: With dead ends: 29 [2022-03-18 22:40:28,755 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 22:40:28,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:40:28,756 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:28,756 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 22:40:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-18 22:40:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-18 22:40:28,763 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-03-18 22:40:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:28,764 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-18 22:40:28,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-18 22:40:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 22:40:28,764 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:28,764 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:28,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 22:40:28,765 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash -120195778, now seen corresponding path program 1 times [2022-03-18 22:40:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122769276] [2022-03-18 22:40:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:28,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122769276] [2022-03-18 22:40:28,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122769276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344170371] [2022-03-18 22:40:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:28,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:28,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:28,804 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) [2022-03-18 22:40:28,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:40:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:28,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 22:40:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:28,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:28,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344170371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:28,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:28,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 22:40:28,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190143565] [2022-03-18 22:40:28,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:28,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 22:40:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 22:40:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:40:28,954 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 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) [2022-03-18 22:40:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:29,024 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-03-18 22:40:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:40:29,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 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 17 [2022-03-18 22:40:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:29,025 INFO L225 Difference]: With dead ends: 35 [2022-03-18 22:40:29,025 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 22:40:29,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:40:29,026 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:29,026 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 22:40:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-18 22:40:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-18 22:40:29,030 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-03-18 22:40:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:29,030 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-18 22:40:29,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 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) [2022-03-18 22:40:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-18 22:40:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 22:40:29,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:29,031 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:29,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 22:40:29,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:29,249 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1892855179, now seen corresponding path program 2 times [2022-03-18 22:40:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485062393] [2022-03-18 22:40:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:29,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 22:40:29,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485062393] [2022-03-18 22:40:29,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485062393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119152921] [2022-03-18 22:40:29,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:40:29,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:29,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:29,309 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) [2022-03-18 22:40:29,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:40:29,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:40:29,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:29,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 22:40:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:29,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:40:29,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119152921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:29,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:29,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 11 [2022-03-18 22:40:29,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012366611] [2022-03-18 22:40:29,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:29,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 22:40:29,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 22:40:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:40:29,447 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 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) [2022-03-18 22:40:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:29,714 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2022-03-18 22:40:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 22:40:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 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 23 [2022-03-18 22:40:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:29,716 INFO L225 Difference]: With dead ends: 74 [2022-03-18 22:40:29,716 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 22:40:29,717 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-18 22:40:29,720 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:29,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 25 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 22:40:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-03-18 22:40:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-18 22:40:29,726 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 23 [2022-03-18 22:40:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:29,726 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-18 22:40:29,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 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) [2022-03-18 22:40:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-18 22:40:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 22:40:29,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:29,727 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:29,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:29,944 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,SelfDestructingSolverStorable5 [2022-03-18 22:40:29,945 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:29,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1061661624, now seen corresponding path program 3 times [2022-03-18 22:40:29,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:29,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465877202] [2022-03-18 22:40:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:29,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-18 22:40:29,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:29,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465877202] [2022-03-18 22:40:29,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465877202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483179122] [2022-03-18 22:40:29,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:40:29,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:29,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:29,988 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) [2022-03-18 22:40:29,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:40:30,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 22:40:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 22:40:30,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-18 22:40:30,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-18 22:40:30,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483179122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:30,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 22:40:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050198800] [2022-03-18 22:40:30,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:30,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 22:40:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 22:40:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:40:30,164 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 1 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) [2022-03-18 22:40:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:30,223 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2022-03-18 22:40:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:40:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 1 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 42 [2022-03-18 22:40:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:30,224 INFO L225 Difference]: With dead ends: 145 [2022-03-18 22:40:30,224 INFO L226 Difference]: Without dead ends: 142 [2022-03-18 22:40:30,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:40:30,225 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:30,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 32 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-18 22:40:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-18 22:40:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 138 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2022-03-18 22:40:30,239 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 42 [2022-03-18 22:40:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:30,239 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2022-03-18 22:40:30,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 1 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) [2022-03-18 22:40:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2022-03-18 22:40:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 22:40:30,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:30,242 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:30,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:30,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:30,458 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash -372274258, now seen corresponding path program 4 times [2022-03-18 22:40:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:30,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776600035] [2022-03-18 22:40:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:30,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1063 proven. 89 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-03-18 22:40:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:30,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776600035] [2022-03-18 22:40:30,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776600035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:30,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980047221] [2022-03-18 22:40:30,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:40:30,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:30,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:30,536 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) [2022-03-18 22:40:30,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:40:30,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:40:30,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:30,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 22:40:30,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1063 proven. 89 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-03-18 22:40:30,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1063 proven. 89 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-03-18 22:40:30,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980047221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:30,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:30,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 22:40:30,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743991800] [2022-03-18 22:40:30,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:30,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 22:40:30,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:30,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 22:40:30,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:40:30,995 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 1 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) [2022-03-18 22:40:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:31,094 INFO L93 Difference]: Finished difference Result 486 states and 539 transitions. [2022-03-18 22:40:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:40:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 1 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 141 [2022-03-18 22:40:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:31,096 INFO L225 Difference]: With dead ends: 486 [2022-03-18 22:40:31,096 INFO L226 Difference]: Without dead ends: 382 [2022-03-18 22:40:31,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 22:40:31,098 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:31,098 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 37 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-18 22:40:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-03-18 22:40:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.0767195767195767) internal successors, (407), 378 states have internal predecessors, (407), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 410 transitions. [2022-03-18 22:40:31,142 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 410 transitions. Word has length 141 [2022-03-18 22:40:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:31,142 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 410 transitions. [2022-03-18 22:40:31,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 1 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) [2022-03-18 22:40:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 410 transitions. [2022-03-18 22:40:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-03-18 22:40:31,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:31,145 INFO L500 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:31,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 22:40:31,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:31,359 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 795251118, now seen corresponding path program 5 times [2022-03-18 22:40:31,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:31,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254223865] [2022-03-18 22:40:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:31,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2022-03-18 22:40:31,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:31,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254223865] [2022-03-18 22:40:31,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254223865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:31,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950404364] [2022-03-18 22:40:31,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:40:31,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:31,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:31,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:31,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:40:31,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2022-03-18 22:40:31,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 22:40:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2022-03-18 22:40:32,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:40:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2022-03-18 22:40:32,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950404364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:40:32,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:40:32,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-18 22:40:32,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285194493] [2022-03-18 22:40:32,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:40:32,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 22:40:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 22:40:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:40:32,943 INFO L87 Difference]: Start difference. First operand 382 states and 410 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 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) [2022-03-18 22:40:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:33,039 INFO L93 Difference]: Finished difference Result 571 states and 614 transitions. [2022-03-18 22:40:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:40:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 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 381 [2022-03-18 22:40:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:33,041 INFO L225 Difference]: With dead ends: 571 [2022-03-18 22:40:33,041 INFO L226 Difference]: Without dead ends: 568 [2022-03-18 22:40:33,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 761 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 22:40:33,042 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:33,042 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 37 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-03-18 22:40:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-03-18 22:40:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 564 states have (on average 1.076241134751773) internal successors, (607), 564 states have internal predecessors, (607), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 610 transitions. [2022-03-18 22:40:33,071 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 610 transitions. Word has length 381 [2022-03-18 22:40:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:33,071 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 610 transitions. [2022-03-18 22:40:33,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 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) [2022-03-18 22:40:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 610 transitions. [2022-03-18 22:40:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-03-18 22:40:33,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:40:33,077 INFO L500 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:40:33,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:33,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:33,298 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:40:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:40:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 107392494, now seen corresponding path program 6 times [2022-03-18 22:40:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:40:33,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837069509] [2022-03-18 22:40:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:40:33,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:40:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:40:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:40:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 0 proven. 48558 refuted. 0 times theorem prover too weak. 7815 trivial. 0 not checked. [2022-03-18 22:40:33,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:40:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837069509] [2022-03-18 22:40:33,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837069509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:40:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331496560] [2022-03-18 22:40:33,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:40:33,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:33,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:40:33,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:40:33,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:40:33,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-18 22:40:33,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:40:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 22:40:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:40:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 16183 proven. 0 refuted. 0 times theorem prover too weak. 40190 trivial. 0 not checked. [2022-03-18 22:40:34,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:40:34,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331496560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:40:34,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 22:40:34,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [27] total 27 [2022-03-18 22:40:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349583096] [2022-03-18 22:40:34,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:40:34,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 22:40:34,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:40:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 22:40:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-03-18 22:40:34,656 INFO L87 Difference]: Start difference. First operand 568 states and 610 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:40:34,721 INFO L93 Difference]: Finished difference Result 568 states and 610 transitions. [2022-03-18 22:40:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:40:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 567 [2022-03-18 22:40:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:40:34,723 INFO L225 Difference]: With dead ends: 568 [2022-03-18 22:40:34,723 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 22:40:34,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 563 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-03-18 22:40:34,727 INFO L912 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:40:34,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:40:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 22:40:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 22:40:34,728 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) [2022-03-18 22:40:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 22:40:34,729 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 567 [2022-03-18 22:40:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:40:34,729 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 22:40:34,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:40:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 22:40:34,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 22:40:34,731 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 22:40:34,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 22:40:34,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:40:34,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 22:40:41,743 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|)) [2022-03-18 22:40:41,743 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 22:40:41,744 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 22:40:41,744 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 15 32) the Hoare annotation is: true [2022-03-18 22:40:41,744 INFO L878 garLoopResultBuilder]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (<= main_~b~0 6) (< 5 main_~b~0) (<= main_~a~0 6) (< 5 main_~c~0) (<= main_~c~0 6)) [2022-03-18 22:40:41,744 INFO L882 garLoopResultBuilder]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L878 garLoopResultBuilder]: At program point L22-3(lines 22 26) the Hoare annotation is: (and (<= main_~b~0 6) (< 5 main_~c~0) (<= main_~c~0 6) (<= main_~a~0 5)) [2022-03-18 22:40:41,744 INFO L882 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L882 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L882 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2022-03-18 22:40:41,744 INFO L878 garLoopResultBuilder]: At program point L23-3(lines 23 25) the Hoare annotation is: (and (<= main_~b~0 5) (<= main_~c~0 6) (<= main_~a~0 5)) [2022-03-18 22:40:41,745 INFO L882 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2022-03-18 22:40:41,745 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 15 32) no Hoare annotation was computed. [2022-03-18 22:40:41,745 INFO L882 garLoopResultBuilder]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2022-03-18 22:40:41,745 INFO L882 garLoopResultBuilder]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2022-03-18 22:40:41,745 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 15 32) no Hoare annotation was computed. [2022-03-18 22:40:41,747 INFO L718 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1] [2022-03-18 22:40:41,748 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 22:40:41,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:40:41 BasicIcfg [2022-03-18 22:40:41,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 22:40:41,760 INFO L158 Benchmark]: Toolchain (without parser) took 14119.30ms. Allocated memory was 196.1MB in the beginning and 436.2MB in the end (delta: 240.1MB). Free memory was 138.3MB in the beginning and 352.6MB in the end (delta: -214.3MB). Peak memory consumption was 239.0MB. Max. memory is 8.0GB. [2022-03-18 22:40:41,760 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 196.1MB. Free memory was 154.4MB in the beginning and 154.3MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 22:40:41,760 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.43ms. Allocated memory was 196.1MB in the beginning and 251.7MB in the end (delta: 55.6MB). Free memory was 138.1MB in the beginning and 224.6MB in the end (delta: -86.5MB). Peak memory consumption was 17.5MB. Max. memory is 8.0GB. [2022-03-18 22:40:41,761 INFO L158 Benchmark]: Boogie Preprocessor took 41.45ms. Allocated memory is still 251.7MB. Free memory was 224.6MB in the beginning and 223.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 22:40:41,761 INFO L158 Benchmark]: RCFGBuilder took 226.67ms. Allocated memory is still 251.7MB. Free memory was 222.5MB in the beginning and 212.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 22:40:41,761 INFO L158 Benchmark]: IcfgTransformer took 28.52ms. Allocated memory is still 251.7MB. Free memory was 212.5MB in the beginning and 211.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 22:40:41,762 INFO L158 Benchmark]: TraceAbstraction took 13654.92ms. Allocated memory was 251.7MB in the beginning and 436.2MB in the end (delta: 184.5MB). Free memory was 211.0MB in the beginning and 352.6MB in the end (delta: -141.6MB). Peak memory consumption was 255.8MB. Max. memory is 8.0GB. [2022-03-18 22:40:41,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 196.1MB. Free memory was 154.4MB in the beginning and 154.3MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 156.43ms. Allocated memory was 196.1MB in the beginning and 251.7MB in the end (delta: 55.6MB). Free memory was 138.1MB in the beginning and 224.6MB in the end (delta: -86.5MB). Peak memory consumption was 17.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.45ms. Allocated memory is still 251.7MB. Free memory was 224.6MB in the beginning and 223.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 226.67ms. Allocated memory is still 251.7MB. Free memory was 222.5MB in the beginning and 212.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 28.52ms. Allocated memory is still 251.7MB. Free memory was 212.5MB in the beginning and 211.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 13654.92ms. Allocated memory was 251.7MB in the beginning and 436.2MB in the end (delta: 184.5MB). Free memory was 211.0MB in the beginning and 352.6MB in the end (delta: -141.6MB). Peak memory consumption was 255.8MB. 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: 29]: 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 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.6s, OverallIterations: 10, TraceHistogramMax: 216, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 380 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 380 mSDsluCounter, 270 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 124 mSDsCounter, 100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 312 IncrementalHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 100 mSolverCounterUnsat, 146 mSDtfsCounter, 312 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1897 GetRequests, 1777 SyntacticMatches, 8 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=568occurred in iteration=9, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 23 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 308 NumberOfFragments, 49 HoareAnnotationTreeSize, 7 FomulaSimplifications, 2913 FormulaSimplificationTreeSizeReduction, 4.9s HoareSimplificationTime, 7 FomulaSimplificationsInter, 5122 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 2387 NumberOfCodeBlocks, 2101 NumberOfCodeBlocksAsserted, 241 NumberOfCheckSat, 2970 ConstructedInterpolants, 0 QuantifiedInterpolants, 7627 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1615 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 91092/196614 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: 22]: Loop Invariant Derived loop invariant: ((b <= 6 && 5 < c) && c <= 6) && a <= 5 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((b <= 6 && 5 < b) && a <= 6) && 5 < c) && c <= 6 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (b <= 5 && c <= 6) && a <= 5 RESULT: Ultimate proved your program to be correct! [2022-03-18 22:40:41,797 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...