./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-simple/deep-nested.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:57:50,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:57:50,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:57:50,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:57:50,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:57:50,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:57:50,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:57:50,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:57:50,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:57:50,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:57:50,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:57:50,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:57:50,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:57:50,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:57:50,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:57:50,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:57:50,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:57:50,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:57:50,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:57:50,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:57:50,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:57:50,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:57:50,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:57:50,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:57:50,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:57:50,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:57:50,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:57:50,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:57:50,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:57:50,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:57:50,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:57:50,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:57:50,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:57:50,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:57:50,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:57:50,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:57:50,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:57:50,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:57:50,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:57:50,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:57:50,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:57:50,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:57:50,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:57:50,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:57:50,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:57:50,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:57:50,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:57:50,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:57:50,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:57:50,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:57:50,981 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:57:50,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:57:50,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:57:50,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:57:50,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:57:50,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:57:50,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:57:50,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:57:50,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:57:50,983 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:57:50,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:57:50,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:57:50,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:57:50,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:57:50,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:57:50,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:57:50,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:57:50,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:57:50,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:57:50,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:57:50,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:57:50,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:57:50,985 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:57:50,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:57:50,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:57:50,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:57:50,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2021-12-15 10:57:51,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:57:51,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:57:51,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:57:51,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:57:51,169 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:57:51,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/deep-nested.c [2021-12-15 10:57:51,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44dcb508/ea909844555c43c990cd3477514a2a0a/FLAGd0a44219f [2021-12-15 10:57:51,569 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:57:51,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2021-12-15 10:57:51,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44dcb508/ea909844555c43c990cd3477514a2a0a/FLAGd0a44219f [2021-12-15 10:57:51,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44dcb508/ea909844555c43c990cd3477514a2a0a [2021-12-15 10:57:51,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:57:51,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:57:51,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:57:51,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:57:51,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:57:51,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512a9939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51, skipping insertion in model container [2021-12-15 10:57:51,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:57:51,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:57:51,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2021-12-15 10:57:51,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:57:51,738 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:57:51,748 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2021-12-15 10:57:51,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:57:51,757 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:57:51,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51 WrapperNode [2021-12-15 10:57:51,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:57:51,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:57:51,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:57:51,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:57:51,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,778 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2021-12-15 10:57:51,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:57:51,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:57:51,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:57:51,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:57:51,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:57:51,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:57:51,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:57:51,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:57:51,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (1/1) ... [2021-12-15 10:57:51,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:57:51,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:51,817 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) [2021-12-15 10:57:51,826 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 [2021-12-15 10:57:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:57:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:57:51,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:57:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:57:51,884 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:57:51,888 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:57:51,964 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:57:51,968 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:57:51,968 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-15 10:57:51,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:57:51 BoogieIcfgContainer [2021-12-15 10:57:51,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:57:51,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:57:51,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:57:51,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:57:51,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:57:51" (1/3) ... [2021-12-15 10:57:51,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fba367e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:57:51, skipping insertion in model container [2021-12-15 10:57:51,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:51" (2/3) ... [2021-12-15 10:57:51,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fba367e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:57:51, skipping insertion in model container [2021-12-15 10:57:51,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:57:51" (3/3) ... [2021-12-15 10:57:51,977 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2021-12-15 10:57:51,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:57:51,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:57:52,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:57:52,016 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:57:52,017 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:57:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 10:57:52,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:52,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:52,032 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash -180366952, now seen corresponding path program 1 times [2021-12-15 10:57:52,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:52,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016602120] [2021-12-15 10:57:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:52,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:52,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:52,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016602120] [2021-12-15 10:57:52,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016602120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:52,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:57:52,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:57:52,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833360588] [2021-12-15 10:57:52,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:52,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:57:52,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:57:52,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:57:52,353 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-15 10:57:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:52,423 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2021-12-15 10:57:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:57:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 10:57:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:52,430 INFO L225 Difference]: With dead ends: 39 [2021-12-15 10:57:52,430 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 10:57:52,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:57:52,435 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:52,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 10:57:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-15 10:57:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-12-15 10:57:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-12-15 10:57:52,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2021-12-15 10:57:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:52,461 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-12-15 10:57:52,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-15 10:57:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-12-15 10:57:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:57:52,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:52,462 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:52,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:57:52,463 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:52,465 INFO L85 PathProgramCache]: Analyzing trace with hash -303894894, now seen corresponding path program 1 times [2021-12-15 10:57:52,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:52,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070932282] [2021-12-15 10:57:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:52,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:52,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:52,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070932282] [2021-12-15 10:57:52,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070932282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:52,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352442993] [2021-12-15 10:57:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:52,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:52,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:52,683 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) [2021-12-15 10:57:52,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:57:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 10:57:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:52,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:53,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352442993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:53,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:53,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-12-15 10:57:53,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350850450] [2021-12-15 10:57:53,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:53,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 10:57:53,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 10:57:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:57:53,188 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2021-12-15 10:57:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:53,611 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2021-12-15 10:57:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 10:57:53,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 10:57:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:53,612 INFO L225 Difference]: With dead ends: 80 [2021-12-15 10:57:53,612 INFO L226 Difference]: Without dead ends: 78 [2021-12-15 10:57:53,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-15 10:57:53,614 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 123 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:53,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 37 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:57:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-15 10:57:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2021-12-15 10:57:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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) [2021-12-15 10:57:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-12-15 10:57:53,621 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 12 [2021-12-15 10:57:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:53,621 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-12-15 10:57:53,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2021-12-15 10:57:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-12-15 10:57:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 10:57:53,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:53,622 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:53,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:53,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:53,838 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash -300219110, now seen corresponding path program 1 times [2021-12-15 10:57:53,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:53,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264497208] [2021-12-15 10:57:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:53,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 10:57:53,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:53,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264497208] [2021-12-15 10:57:53,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264497208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:53,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639937130] [2021-12-15 10:57:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:53,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:53,984 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) [2021-12-15 10:57:53,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:57:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:57:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 10:57:54,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:57:54,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639937130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:54,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:57:54,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-15 10:57:54,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500666792] [2021-12-15 10:57:54,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:54,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:57:54,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:54,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:57:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:57:54,073 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:54,142 INFO L93 Difference]: Finished difference Result 91 states and 120 transitions. [2021-12-15 10:57:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:57:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 10:57:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:54,146 INFO L225 Difference]: With dead ends: 91 [2021-12-15 10:57:54,146 INFO L226 Difference]: Without dead ends: 68 [2021-12-15 10:57:54,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:54,149 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:54,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-15 10:57:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-12-15 10:57:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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) [2021-12-15 10:57:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-15 10:57:54,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 24 [2021-12-15 10:57:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:54,162 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-15 10:57:54,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-15 10:57:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 10:57:54,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:54,163 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:54,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 10:57:54,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-15 10:57:54,377 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2053128687, now seen corresponding path program 1 times [2021-12-15 10:57:54,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:54,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237868887] [2021-12-15 10:57:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:54,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 10:57:54,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237868887] [2021-12-15 10:57:54,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237868887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:54,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600592054] [2021-12-15 10:57:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:54,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:54,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:54,474 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) [2021-12-15 10:57:54,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:57:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:57:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 10:57:54,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:57:54,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600592054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:54,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:57:54,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-12-15 10:57:54,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584516020] [2021-12-15 10:57:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:54,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:57:54,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:57:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:54,562 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:54,620 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2021-12-15 10:57:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:57:54,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 10:57:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:54,621 INFO L225 Difference]: With dead ends: 100 [2021-12-15 10:57:54,621 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 10:57:54,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:57:54,622 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:54,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 16 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 10:57:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 40. [2021-12-15 10:57:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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) [2021-12-15 10:57:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-15 10:57:54,629 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 27 [2021-12-15 10:57:54,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:54,629 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-15 10:57:54,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-15 10:57:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 10:57:54,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:54,630 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:54,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 10:57:54,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:54,843 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1169919440, now seen corresponding path program 1 times [2021-12-15 10:57:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:54,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9054861] [2021-12-15 10:57:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:54,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 10:57:54,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9054861] [2021-12-15 10:57:54,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9054861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:54,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370485806] [2021-12-15 10:57:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:54,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:54,939 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) [2021-12-15 10:57:54,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:57:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:57:54,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 10:57:55,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:57:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370485806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:55,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:57:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-12-15 10:57:55,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725669106] [2021-12-15 10:57:55,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:57:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:57:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:55,025 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-12-15 10:57:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:55,081 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-12-15 10:57:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:57:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 10:57:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:55,083 INFO L225 Difference]: With dead ends: 84 [2021-12-15 10:57:55,083 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 10:57:55,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:57:55,085 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 67 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:55,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 10:57:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-12-15 10:57:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 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) [2021-12-15 10:57:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-12-15 10:57:55,095 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 30 [2021-12-15 10:57:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:55,095 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-12-15 10:57:55,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-12-15 10:57:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-12-15 10:57:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 10:57:55,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:55,096 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:55,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:55,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:55,302 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1349858359, now seen corresponding path program 2 times [2021-12-15 10:57:55,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:55,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767814082] [2021-12-15 10:57:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:55,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 10:57:55,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767814082] [2021-12-15 10:57:55,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767814082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306769107] [2021-12-15 10:57:55,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:57:55,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:55,430 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) [2021-12-15 10:57:55,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:57:55,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 10:57:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 10:57:55,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 10:57:55,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:57:55,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306769107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:55,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:57:55,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-15 10:57:55,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817196809] [2021-12-15 10:57:55,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:55,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:57:55,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:57:55,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:55,598 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:55,624 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2021-12-15 10:57:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:57:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-15 10:57:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:55,626 INFO L225 Difference]: With dead ends: 73 [2021-12-15 10:57:55,626 INFO L226 Difference]: Without dead ends: 71 [2021-12-15 10:57:55,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:55,628 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:55,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-15 10:57:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-12-15 10:57:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 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) [2021-12-15 10:57:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-15 10:57:55,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 36 [2021-12-15 10:57:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:55,642 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-15 10:57:55,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-15 10:57:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 10:57:55,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:55,645 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:55,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:55,851 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash 661403962, now seen corresponding path program 3 times [2021-12-15 10:57:55,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:55,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801115004] [2021-12-15 10:57:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:55,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-15 10:57:55,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801115004] [2021-12-15 10:57:55,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801115004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360529665] [2021-12-15 10:57:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:57:55,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:55,988 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) [2021-12-15 10:57:55,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 10:57:56,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-15 10:57:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:56,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:57:56,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 10:57:56,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:57:56,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360529665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:56,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:57:56,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-15 10:57:56,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766700326] [2021-12-15 10:57:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:56,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:57:56,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:57:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:56,125 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-12-15 10:57:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:56,155 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2021-12-15 10:57:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:57:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-15 10:57:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:56,156 INFO L225 Difference]: With dead ends: 85 [2021-12-15 10:57:56,156 INFO L226 Difference]: Without dead ends: 83 [2021-12-15 10:57:56,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:56,157 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:56,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-15 10:57:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2021-12-15 10:57:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.280701754385965) internal successors, (73), 57 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2021-12-15 10:57:56,163 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 48 [2021-12-15 10:57:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:56,163 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2021-12-15 10:57:56,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-12-15 10:57:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2021-12-15 10:57:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 10:57:56,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:56,164 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:56,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:56,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:56,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1257114416, now seen corresponding path program 4 times [2021-12-15 10:57:56,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:56,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801823761] [2021-12-15 10:57:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:56,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-15 10:57:56,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:56,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801823761] [2021-12-15 10:57:56,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801823761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:56,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036178376] [2021-12-15 10:57:56,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:57:56,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:56,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:56,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 10:57:56,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:57:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:57:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 10:57:56,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 98 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 10:57:56,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036178376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:56,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:56,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-15 10:57:56,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589455223] [2021-12-15 10:57:56,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:56,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 10:57:56,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 10:57:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-12-15 10:57:56,777 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:57,500 INFO L93 Difference]: Finished difference Result 233 states and 305 transitions. [2021-12-15 10:57:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 10:57:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 10:57:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:57,501 INFO L225 Difference]: With dead ends: 233 [2021-12-15 10:57:57,501 INFO L226 Difference]: Without dead ends: 125 [2021-12-15 10:57:57,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 10:57:57,502 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 210 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:57,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 72 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:57:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-15 10:57:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2021-12-15 10:57:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 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) [2021-12-15 10:57:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2021-12-15 10:57:57,510 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 57 [2021-12-15 10:57:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:57,511 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2021-12-15 10:57:57,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2021-12-15 10:57:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 10:57:57,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:57,512 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:57,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:57,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 722891500, now seen corresponding path program 5 times [2021-12-15 10:57:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470954186] [2021-12-15 10:57:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:57,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 16 proven. 141 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-15 10:57:57,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470954186] [2021-12-15 10:57:57,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470954186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895023] [2021-12-15 10:57:57,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:57:57,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:57,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:57,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:57,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 10:57:57,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 10:57:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:57:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 186 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-15 10:57:58,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 186 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-15 10:57:58,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:58,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:58,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2021-12-15 10:57:58,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539743328] [2021-12-15 10:57:58,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:58,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 10:57:58,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 10:57:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-12-15 10:57:58,288 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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) [2021-12-15 10:57:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:59,230 INFO L93 Difference]: Finished difference Result 530 states and 658 transitions. [2021-12-15 10:57:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 10:57:59,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-15 10:57:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:59,231 INFO L225 Difference]: With dead ends: 530 [2021-12-15 10:57:59,231 INFO L226 Difference]: Without dead ends: 330 [2021-12-15 10:57:59,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 10:57:59,233 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 253 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:59,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 97 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:57:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-15 10:57:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 160. [2021-12-15 10:57:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.119496855345912) internal successors, (178), 159 states have internal predecessors, (178), 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) [2021-12-15 10:57:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 178 transitions. [2021-12-15 10:57:59,245 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 178 transitions. Word has length 78 [2021-12-15 10:57:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:59,246 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 178 transitions. [2021-12-15 10:57:59,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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) [2021-12-15 10:57:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 178 transitions. [2021-12-15 10:57:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-15 10:57:59,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:59,247 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:59,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:59,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 10:57:59,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:59,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:59,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1550504784, now seen corresponding path program 6 times [2021-12-15 10:57:59,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:59,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970498666] [2021-12-15 10:57:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:59,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 20 proven. 514 refuted. 0 times theorem prover too weak. 1872 trivial. 0 not checked. [2021-12-15 10:57:59,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:59,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970498666] [2021-12-15 10:57:59,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970498666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:59,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170618316] [2021-12-15 10:57:59,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:57:59,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:59,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:59,749 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:59,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 10:57:59,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-15 10:57:59,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 10:57:59,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 1218 proven. 364 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2021-12-15 10:58:00,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 1582 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2021-12-15 10:58:00,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170618316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:00,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:00,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2021-12-15 10:58:00,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999794398] [2021-12-15 10:58:00,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:00,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 10:58:00,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:00,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 10:58:00,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-15 10:58:00,511 INFO L87 Difference]: Start difference. First operand 160 states and 178 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 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) [2021-12-15 10:58:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:01,480 INFO L93 Difference]: Finished difference Result 988 states and 1148 transitions. [2021-12-15 10:58:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-15 10:58:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-12-15 10:58:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:01,483 INFO L225 Difference]: With dead ends: 988 [2021-12-15 10:58:01,484 INFO L226 Difference]: Without dead ends: 832 [2021-12-15 10:58:01,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 10:58:01,485 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 231 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:01,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 54 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:01,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-12-15 10:58:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 439. [2021-12-15 10:58:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.082191780821918) internal successors, (474), 438 states have internal predecessors, (474), 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) [2021-12-15 10:58:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 474 transitions. [2021-12-15 10:58:01,516 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 474 transitions. Word has length 159 [2021-12-15 10:58:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:01,516 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 474 transitions. [2021-12-15 10:58:01,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 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) [2021-12-15 10:58:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 474 transitions. [2021-12-15 10:58:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-12-15 10:58:01,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:01,519 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 114, 19, 18, 18, 9, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:01,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:01,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 10:58:01,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1771881509, now seen corresponding path program 7 times [2021-12-15 10:58:01,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:01,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696023233] [2021-12-15 10:58:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:01,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22369 backedges. 40 proven. 2343 refuted. 0 times theorem prover too weak. 19986 trivial. 0 not checked. [2021-12-15 10:58:02,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696023233] [2021-12-15 10:58:02,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696023233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674079349] [2021-12-15 10:58:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:58:02,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:02,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:02,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 10:58:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 10:58:02,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22369 backedges. 4244 proven. 158 refuted. 0 times theorem prover too weak. 17967 trivial. 0 not checked. [2021-12-15 10:58:03,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22369 backedges. 4244 proven. 158 refuted. 0 times theorem prover too weak. 17967 trivial. 0 not checked. [2021-12-15 10:58:03,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674079349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:03,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:03,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2021-12-15 10:58:03,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844350379] [2021-12-15 10:58:03,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:03,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 10:58:03,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 10:58:03,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-15 10:58:03,739 INFO L87 Difference]: Start difference. First operand 439 states and 474 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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) [2021-12-15 10:58:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:08,636 INFO L93 Difference]: Finished difference Result 2204 states and 2537 transitions. [2021-12-15 10:58:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-15 10:58:08,636 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 438 [2021-12-15 10:58:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:08,640 INFO L225 Difference]: With dead ends: 2204 [2021-12-15 10:58:08,641 INFO L226 Difference]: Without dead ends: 1769 [2021-12-15 10:58:08,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 863 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1425, Invalid=7505, Unknown=0, NotChecked=0, Total=8930 [2021-12-15 10:58:08,644 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 567 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:08,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 86 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 10:58:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-12-15 10:58:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1581. [2021-12-15 10:58:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.0449367088607595) internal successors, (1651), 1580 states have internal predecessors, (1651), 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) [2021-12-15 10:58:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 1651 transitions. [2021-12-15 10:58:08,737 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 1651 transitions. Word has length 438 [2021-12-15 10:58:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:08,738 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 1651 transitions. [2021-12-15 10:58:08,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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) [2021-12-15 10:58:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 1651 transitions. [2021-12-15 10:58:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1579 [2021-12-15 10:58:08,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:08,782 INFO L514 BasicCegarLoop]: trace histogram [460, 459, 459, 54, 53, 53, 9, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:08,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:08,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 10:58:08,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:08,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:08,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1725684432, now seen corresponding path program 8 times [2021-12-15 10:58:08,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:08,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129325289] [2021-12-15 10:58:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:08,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 345369 backedges. 75 proven. 13706 refuted. 0 times theorem prover too weak. 331588 trivial. 0 not checked. [2021-12-15 10:58:12,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129325289] [2021-12-15 10:58:12,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129325289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424317118] [2021-12-15 10:58:12,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:58:12,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:12,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:12,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 10:58:12,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:58:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:12,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2273 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 10:58:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 345369 backedges. 119626 proven. 8903 refuted. 0 times theorem prover too weak. 216840 trivial. 0 not checked. [2021-12-15 10:58:14,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 345369 backedges. 119620 proven. 8909 refuted. 0 times theorem prover too weak. 216840 trivial. 0 not checked. [2021-12-15 10:58:16,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424317118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:16,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:16,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2021-12-15 10:58:16,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988328943] [2021-12-15 10:58:16,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:16,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 10:58:16,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 10:58:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-12-15 10:58:16,796 INFO L87 Difference]: Start difference. First operand 1581 states and 1651 transitions. Second operand has 29 states, 29 states have (on average 4.344827586206897) internal successors, (126), 29 states have internal predecessors, (126), 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) [2021-12-15 10:58:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:24,457 INFO L93 Difference]: Finished difference Result 6102 states and 6715 transitions. [2021-12-15 10:58:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-15 10:58:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.344827586206897) internal successors, (126), 29 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1578 [2021-12-15 10:58:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:24,468 INFO L225 Difference]: With dead ends: 6102 [2021-12-15 10:58:24,469 INFO L226 Difference]: Without dead ends: 4525 [2021-12-15 10:58:24,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3257 GetRequests, 3143 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4356 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1899, Invalid=11441, Unknown=0, NotChecked=0, Total=13340 [2021-12-15 10:58:24,476 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 820 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:24,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 137 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 10:58:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2021-12-15 10:58:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 4121. [2021-12-15 10:58:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4121 states, 4120 states have (on average 1.0320388349514562) internal successors, (4252), 4120 states have internal predecessors, (4252), 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) [2021-12-15 10:58:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 4252 transitions. [2021-12-15 10:58:24,752 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 4252 transitions. Word has length 1578 [2021-12-15 10:58:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:24,752 INFO L470 AbstractCegarLoop]: Abstraction has 4121 states and 4252 transitions. [2021-12-15 10:58:24,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.344827586206897) internal successors, (126), 29 states have internal predecessors, (126), 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) [2021-12-15 10:58:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 4252 transitions. [2021-12-15 10:58:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4117 [2021-12-15 10:58:24,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:24,834 INFO L514 BasicCegarLoop]: trace histogram [1243, 1242, 1242, 108, 107, 107, 18, 17, 17, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:24,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-15 10:58:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 10:58:25,043 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2089192947, now seen corresponding path program 9 times [2021-12-15 10:58:25,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471004254] [2021-12-15 10:58:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:25,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2466894 backedges. 147 proven. 48353 refuted. 0 times theorem prover too weak. 2418394 trivial. 0 not checked. [2021-12-15 10:58:38,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:38,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471004254] [2021-12-15 10:58:38,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471004254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798553991] [2021-12-15 10:58:38,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:58:38,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:38,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:38,524 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:38,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 10:58:38,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-15 10:58:38,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:38,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 10:58:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2466894 backedges. 1097202 proven. 548761 refuted. 0 times theorem prover too weak. 820931 trivial. 0 not checked. [2021-12-15 10:58:52,046 INFO L328 TraceCheckSpWp]: Computing backward predicates...