./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/recursive/EvenOdd01-1.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 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:38:50,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:38:50,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:38:50,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:38:50,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:38:50,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:38:50,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:38:50,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:38:50,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:38:50,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:38:50,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:38:50,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:38:50,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:38:50,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:38:50,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:38:50,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:38:50,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:38:50,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:38:50,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:38:50,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:38:50,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:38:50,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:38:50,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:38:50,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:38:50,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:38:50,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:38:50,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:38:50,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:38:50,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:38:50,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:38:50,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:38:50,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:38:50,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:38:50,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:38:50,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:38:50,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:38:50,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:38:50,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:38:50,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:38:50,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:38:50,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:38:50,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:38:50,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:38:50,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:38:50,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:38:50,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:38:50,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:38:50,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:38:50,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:38:50,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:38:50,756 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:38:50,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:38:50,757 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:38:50,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:38:50,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:38:50,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:38:50,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:38:50,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:38:50,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:38:50,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:38:50,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:38:50,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:38:50,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:38:50,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:38:50,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:38:50,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:38:50,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:38:50,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:38:50,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:38:50,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:38:50,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:38:50,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:38:50,763 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:38:50,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:38:50,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:38:50,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:38:50,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2021-12-22 11:38:50,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:38:50,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:38:50,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:38:50,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:38:50,971 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:38:50,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-12-22 11:38:51,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5831f73a6/46b090f0c49b4e7aac06041381f3ee3e/FLAG4fc6eb80b [2021-12-22 11:38:51,325 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:38:51,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-12-22 11:38:51,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5831f73a6/46b090f0c49b4e7aac06041381f3ee3e/FLAG4fc6eb80b [2021-12-22 11:38:51,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5831f73a6/46b090f0c49b4e7aac06041381f3ee3e [2021-12-22 11:38:51,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:38:51,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:38:51,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:38:51,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:38:51,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:38:51,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3b82db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51, skipping insertion in model container [2021-12-22 11:38:51,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:38:51,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:38:51,887 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/recursive/EvenOdd01-1.c[975,988] [2021-12-22 11:38:51,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:38:51,893 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:38:51,903 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/recursive/EvenOdd01-1.c[975,988] [2021-12-22 11:38:51,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:38:51,911 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:38:51,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51 WrapperNode [2021-12-22 11:38:51,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:38:51,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:38:51,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:38:51,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:38:51,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,931 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2021-12-22 11:38:51,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:38:51,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:38:51,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:38:51,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:38:51,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:38:51,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:38:51,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:38:51,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:38:51,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (1/1) ... [2021-12-22 11:38:51,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:38:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:52,017 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) [2021-12-22 11:38:52,047 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 [2021-12-22 11:38:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:38:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-12-22 11:38:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-12-22 11:38:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:38:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-12-22 11:38:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-12-22 11:38:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:38:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:38:52,097 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:38:52,098 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:38:52,176 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:38:52,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:38:52,180 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 11:38:52,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:38:52 BoogieIcfgContainer [2021-12-22 11:38:52,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:38:52,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:38:52,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:38:52,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:38:52,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:38:51" (1/3) ... [2021-12-22 11:38:52,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9e5a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:38:52, skipping insertion in model container [2021-12-22 11:38:52,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:51" (2/3) ... [2021-12-22 11:38:52,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9e5a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:38:52, skipping insertion in model container [2021-12-22 11:38:52,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:38:52" (3/3) ... [2021-12-22 11:38:52,187 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2021-12-22 11:38:52,190 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:38:52,190 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:38:52,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:38:52,223 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 [2021-12-22 11:38:52,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:38:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 11:38:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 11:38:52,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:52,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:52,245 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2021-12-22 11:38:52,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:52,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418449344] [2021-12-22 11:38:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:52,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:52,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:38:52,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418449344] [2021-12-22 11:38:52,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418449344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:38:52,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:38:52,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:38:52,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023927081] [2021-12-22 11:38:52,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:38:52,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:38:52,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:38:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:38:52,672 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 11:38:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:52,765 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-12-22 11:38:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:38:52,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-22 11:38:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:52,781 INFO L225 Difference]: With dead ends: 37 [2021-12-22 11:38:52,782 INFO L226 Difference]: Without dead ends: 24 [2021-12-22 11:38:52,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:38:52,786 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:52,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 102 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:38:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-22 11:38:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-22 11:38:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 11:38:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-22 11:38:52,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2021-12-22 11:38:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:52,821 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-22 11:38:52,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 11:38:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-22 11:38:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 11:38:52,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:52,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:52,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:38:52,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2021-12-22 11:38:52,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:52,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060752936] [2021-12-22 11:38:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:52,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:38:53,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060752936] [2021-12-22 11:38:53,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060752936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:38:53,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:38:53,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:38:53,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260200209] [2021-12-22 11:38:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:38:53,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:38:53,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:38:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:38:53,157 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 11:38:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:53,213 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-22 11:38:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:38:53,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-22 11:38:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:53,214 INFO L225 Difference]: With dead ends: 30 [2021-12-22 11:38:53,215 INFO L226 Difference]: Without dead ends: 26 [2021-12-22 11:38:53,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:38:53,217 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:53,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:38:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-22 11:38:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-12-22 11:38:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 11:38:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-22 11:38:53,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2021-12-22 11:38:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:53,224 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-22 11:38:53,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 11:38:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-22 11:38:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 11:38:53,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:53,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:53,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:38:53,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2021-12-22 11:38:53,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:53,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365455292] [2021-12-22 11:38:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:53,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:38:53,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365455292] [2021-12-22 11:38:53,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365455292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:38:53,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:38:53,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:38:53,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715634837] [2021-12-22 11:38:53,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:38:53,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:38:53,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:38:53,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:38:53,307 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:38:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:53,339 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-22 11:38:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:38:53,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-22 11:38:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:53,341 INFO L225 Difference]: With dead ends: 38 [2021-12-22 11:38:53,341 INFO L226 Difference]: Without dead ends: 26 [2021-12-22 11:38:53,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:38:53,347 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:53,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:38:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-22 11:38:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-12-22 11:38:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 11:38:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-22 11:38:53,358 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2021-12-22 11:38:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:53,358 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-22 11:38:53,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:38:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-22 11:38:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 11:38:53,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:53,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:38:53,360 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2021-12-22 11:38:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:53,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586459155] [2021-12-22 11:38:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:53,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:38:53,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586459155] [2021-12-22 11:38:53,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586459155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:38:53,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:38:53,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 11:38:53,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334081210] [2021-12-22 11:38:53,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:38:53,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 11:38:53,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 11:38:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:38:53,564 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:38:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:53,662 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-22 11:38:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:38:53,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-22 11:38:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:53,665 INFO L225 Difference]: With dead ends: 33 [2021-12-22 11:38:53,665 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 11:38:53,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:38:53,672 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:53,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 99 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:38:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 11:38:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-22 11:38:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 11:38:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-22 11:38:53,682 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2021-12-22 11:38:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:53,683 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-22 11:38:53,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:38:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-22 11:38:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 11:38:53,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:53,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:53,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:38:53,685 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2021-12-22 11:38:53,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:53,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296361177] [2021-12-22 11:38:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:53,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:38:53,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296361177] [2021-12-22 11:38:53,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296361177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:38:53,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:38:53,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:38:53,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717356419] [2021-12-22 11:38:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:38:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:38:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:38:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:38:53,740 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 11:38:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:53,783 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-22 11:38:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:38:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-22 11:38:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:53,784 INFO L225 Difference]: With dead ends: 39 [2021-12-22 11:38:53,784 INFO L226 Difference]: Without dead ends: 27 [2021-12-22 11:38:53,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:38:53,785 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:53,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:38:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-22 11:38:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-22 11:38:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 11:38:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-22 11:38:53,788 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2021-12-22 11:38:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:53,789 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-22 11:38:53,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 11:38:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-22 11:38:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 11:38:53,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:53,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:53,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:38:53,790 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2021-12-22 11:38:53,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:53,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895387991] [2021-12-22 11:38:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:53,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:53,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 11:38:54,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895387991] [2021-12-22 11:38:54,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895387991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444295781] [2021-12-22 11:38:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:54,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:54,076 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) [2021-12-22 11:38:54,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:38:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 11:38:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 11:38:54,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:38:54,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444295781] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:54,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:54,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-12-22 11:38:54,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073791420] [2021-12-22 11:38:54,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:54,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 11:38:54,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:54,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 11:38:54,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-12-22 11:38:54,874 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 11:38:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:55,018 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-12-22 11:38:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 11:38:55,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2021-12-22 11:38:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:55,019 INFO L225 Difference]: With dead ends: 39 [2021-12-22 11:38:55,019 INFO L226 Difference]: Without dead ends: 35 [2021-12-22 11:38:55,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-12-22 11:38:55,020 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:55,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 142 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:38:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-22 11:38:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-12-22 11:38:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-22 11:38:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-22 11:38:55,023 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2021-12-22 11:38:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-22 11:38:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 11:38:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-22 11:38:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 11:38:55,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:55,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:55,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 11:38:55,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 11:38:55,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2021-12-22 11:38:55,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:55,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357477372] [2021-12-22 11:38:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:55,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:55,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:55,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:55,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:55,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 11:38:55,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357477372] [2021-12-22 11:38:55,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357477372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83338789] [2021-12-22 11:38:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:55,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:55,448 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) [2021-12-22 11:38:55,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:38:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-22 11:38:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 11:38:55,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:38:56,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83338789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:56,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:56,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 23 [2021-12-22 11:38:56,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489353425] [2021-12-22 11:38:56,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:56,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 11:38:56,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 11:38:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-12-22 11:38:56,273 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-22 11:38:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:56,508 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-12-22 11:38:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 11:38:56,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2021-12-22 11:38:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:56,509 INFO L225 Difference]: With dead ends: 45 [2021-12-22 11:38:56,509 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 11:38:56,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-12-22 11:38:56,510 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:56,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 172 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:38:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 11:38:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-12-22 11:38:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:38:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-22 11:38:56,513 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2021-12-22 11:38:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:56,513 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-22 11:38:56,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-22 11:38:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-22 11:38:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 11:38:56,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:56,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:56,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:38:56,714 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,SelfDestructingSolverStorable6 [2021-12-22 11:38:56,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:56,715 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2021-12-22 11:38:56,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:56,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066220400] [2021-12-22 11:38:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:56,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:56,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:56,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:56,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:56,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 11:38:56,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:56,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066220400] [2021-12-22 11:38:56,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066220400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:56,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789940971] [2021-12-22 11:38:56,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:38:56,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:56,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:56,976 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) [2021-12-22 11:38:56,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:38:57,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:38:57,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:38:57,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-22 11:38:57,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 11:38:57,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:38:58,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789940971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:58,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:58,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2021-12-22 11:38:58,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709348033] [2021-12-22 11:38:58,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:58,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 11:38:58,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 11:38:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-12-22 11:38:58,039 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 27 states, 25 states have (on average 1.76) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-22 11:38:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:58,294 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-22 11:38:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 11:38:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2021-12-22 11:38:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:58,296 INFO L225 Difference]: With dead ends: 51 [2021-12-22 11:38:58,296 INFO L226 Difference]: Without dead ends: 47 [2021-12-22 11:38:58,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 11:38:58,297 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:58,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 216 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:38:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-22 11:38:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-22 11:38:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:38:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-22 11:38:58,300 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2021-12-22 11:38:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:58,301 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-22 11:38:58,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-22 11:38:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-22 11:38:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 11:38:58,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:58,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:58,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 11:38:58,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:58,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2021-12-22 11:38:58,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:58,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005437464] [2021-12-22 11:38:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:58,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:58,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:58,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:58,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:58,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:58,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 11:38:58,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:58,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005437464] [2021-12-22 11:38:58,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005437464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:58,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277113493] [2021-12-22 11:38:58,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:38:58,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:58,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:58,816 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) [2021-12-22 11:38:58,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 11:38:58,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:38:58,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:38:58,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-22 11:38:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 11:38:59,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 11:39:00,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277113493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:00,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:00,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 30 [2021-12-22 11:39:00,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816196133] [2021-12-22 11:39:00,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:00,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 11:39:00,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:00,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 11:39:00,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-12-22 11:39:00,088 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 30 states, 28 states have (on average 1.75) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-22 11:39:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:00,453 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-12-22 11:39:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 11:39:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.75) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) Word has length 47 [2021-12-22 11:39:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:00,453 INFO L225 Difference]: With dead ends: 57 [2021-12-22 11:39:00,453 INFO L226 Difference]: Without dead ends: 53 [2021-12-22 11:39:00,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 11:39:00,455 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:00,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 243 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:39:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-22 11:39:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-12-22 11:39:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 11:39:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-12-22 11:39:00,458 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2021-12-22 11:39:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:00,458 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-12-22 11:39:00,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.75) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-22 11:39:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-12-22 11:39:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 11:39:00,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:00,459 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:00,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 11:39:00,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:00,660 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:00,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2021-12-22 11:39:00,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:00,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021619597] [2021-12-22 11:39:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:00,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:00,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:00,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:00,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:00,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:00,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:00,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:00,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 11:39:01,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:01,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021619597] [2021-12-22 11:39:01,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021619597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:01,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715782358] [2021-12-22 11:39:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 11:39:01,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:01,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:01,010 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) [2021-12-22 11:39:01,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 11:39:01,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 11:39:01,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:01,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-22 11:39:01,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 11:39:01,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 11:39:02,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715782358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:02,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:02,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 33 [2021-12-22 11:39:02,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866032192] [2021-12-22 11:39:02,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:02,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 11:39:02,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 11:39:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 11:39:02,551 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 33 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 23 states have internal predecessors, (54), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-22 11:39:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:02,946 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-12-22 11:39:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 11:39:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 23 states have internal predecessors, (54), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 54 [2021-12-22 11:39:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:02,947 INFO L225 Difference]: With dead ends: 63 [2021-12-22 11:39:02,947 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 11:39:02,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 11:39:02,948 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:02,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 331 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:39:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 11:39:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2021-12-22 11:39:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 11:39:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-12-22 11:39:02,951 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2021-12-22 11:39:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:02,952 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-12-22 11:39:02,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 23 states have internal predecessors, (54), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-22 11:39:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-12-22 11:39:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 11:39:02,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:02,952 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:02,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:03,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 11:39:03,179 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:03,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2021-12-22 11:39:03,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:03,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28343204] [2021-12-22 11:39:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:03,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-22 11:39:03,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:03,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28343204] [2021-12-22 11:39:03,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28343204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:03,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720852374] [2021-12-22 11:39:03,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 11:39:03,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:03,554 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) [2021-12-22 11:39:03,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 11:39:03,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 11:39:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-22 11:39:03,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-22 11:39:03,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 11:39:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720852374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:05,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 27] total 35 [2021-12-22 11:39:05,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519673981] [2021-12-22 11:39:05,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:05,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-22 11:39:05,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-22 11:39:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 11:39:05,289 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 24 states have internal predecessors, (58), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-22 11:39:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:05,806 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-12-22 11:39:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 11:39:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 24 states have internal predecessors, (58), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2021-12-22 11:39:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:05,807 INFO L225 Difference]: With dead ends: 69 [2021-12-22 11:39:05,807 INFO L226 Difference]: Without dead ends: 65 [2021-12-22 11:39:05,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 11:39:05,808 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:05,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 376 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:39:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-22 11:39:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-12-22 11:39:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 11:39:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-22 11:39:05,812 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2021-12-22 11:39:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:05,812 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-22 11:39:05,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 24 states have internal predecessors, (58), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-22 11:39:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-22 11:39:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:39:05,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:05,813 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:05,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:06,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:06,030 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2021-12-22 11:39:06,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418490384] [2021-12-22 11:39:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:06,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 11:39:06,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:06,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418490384] [2021-12-22 11:39:06,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418490384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:06,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819318335] [2021-12-22 11:39:06,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 11:39:06,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:06,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:06,465 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) [2021-12-22 11:39:06,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 11:39:06,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 11:39:06,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-22 11:39:06,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 11:39:06,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 11:39:08,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819318335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:08,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:08,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 30] total 39 [2021-12-22 11:39:08,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98276012] [2021-12-22 11:39:08,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:08,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-22 11:39:08,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-22 11:39:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 11:39:08,472 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 39 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 27 states have internal predecessors, (64), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2021-12-22 11:39:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:08,961 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-12-22 11:39:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 11:39:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 27 states have internal predecessors, (64), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) Word has length 68 [2021-12-22 11:39:08,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:08,965 INFO L225 Difference]: With dead ends: 75 [2021-12-22 11:39:08,965 INFO L226 Difference]: Without dead ends: 71 [2021-12-22 11:39:08,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 128 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2021-12-22 11:39:08,966 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:08,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 401 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:39:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-22 11:39:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-12-22 11:39:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 11:39:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-22 11:39:08,971 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2021-12-22 11:39:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:08,971 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-22 11:39:08,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 27 states have internal predecessors, (64), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2021-12-22 11:39:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-22 11:39:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-22 11:39:08,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:08,972 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:08,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:09,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:09,185 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:09,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2021-12-22 11:39:09,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:09,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946453853] [2021-12-22 11:39:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:09,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 11:39:09,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946453853] [2021-12-22 11:39:09,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946453853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549607446] [2021-12-22 11:39:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 11:39:09,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:09,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:09,634 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) [2021-12-22 11:39:09,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 11:39:09,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 11:39:09,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-22 11:39:09,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 11:39:10,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 11:39:11,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549607446] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:11,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:11,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 33] total 41 [2021-12-22 11:39:11,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452227306] [2021-12-22 11:39:11,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:11,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-22 11:39:11,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-22 11:39:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 11:39:11,944 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 41 states, 40 states have (on average 1.7) internal successors, (68), 28 states have internal predecessors, (68), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-22 11:39:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:12,549 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-12-22 11:39:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 11:39:12,549 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.7) internal successors, (68), 28 states have internal predecessors, (68), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) Word has length 75 [2021-12-22 11:39:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:12,549 INFO L225 Difference]: With dead ends: 81 [2021-12-22 11:39:12,550 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 11:39:12,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=3450, Unknown=0, NotChecked=0, Total=3782 [2021-12-22 11:39:12,551 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:12,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 484 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:39:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 11:39:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-12-22 11:39:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 11:39:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-12-22 11:39:12,555 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2021-12-22 11:39:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:12,555 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-12-22 11:39:12,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.7) internal successors, (68), 28 states have internal predecessors, (68), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-22 11:39:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-12-22 11:39:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 11:39:12,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:12,556 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:12,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:12,763 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,SelfDestructingSolverStorable12 [2021-12-22 11:39:12,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2021-12-22 11:39:12,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321720246] [2021-12-22 11:39:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:12,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-22 11:39:13,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:13,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321720246] [2021-12-22 11:39:13,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321720246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:13,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492415851] [2021-12-22 11:39:13,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 11:39:13,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:13,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:13,360 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) [2021-12-22 11:39:13,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 11:39:13,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-22 11:39:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-22 11:39:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-22 11:39:13,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 11:39:16,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492415851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:16,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:16,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 36] total 45 [2021-12-22 11:39:16,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232452660] [2021-12-22 11:39:16,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:16,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-22 11:39:16,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-22 11:39:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 11:39:16,047 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 45 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 31 states have internal predecessors, (74), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2021-12-22 11:39:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:16,730 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-12-22 11:39:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 11:39:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 31 states have internal predecessors, (74), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 82 [2021-12-22 11:39:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:16,731 INFO L225 Difference]: With dead ends: 87 [2021-12-22 11:39:16,732 INFO L226 Difference]: Without dead ends: 83 [2021-12-22 11:39:16,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=365, Invalid=4057, Unknown=0, NotChecked=0, Total=4422 [2021-12-22 11:39:16,733 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:16,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 509 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:39:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-22 11:39:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-12-22 11:39:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 11:39:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-22 11:39:16,740 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2021-12-22 11:39:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:16,740 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-22 11:39:16,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 31 states have internal predecessors, (74), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2021-12-22 11:39:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-22 11:39:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:39:16,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:16,741 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:16,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-22 11:39:16,960 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,SelfDestructingSolverStorable13 [2021-12-22 11:39:16,960 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2021-12-22 11:39:16,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432579967] [2021-12-22 11:39:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:16,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-22 11:39:17,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432579967] [2021-12-22 11:39:17,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432579967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897442294] [2021-12-22 11:39:17,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 11:39:17,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:17,495 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) [2021-12-22 11:39:17,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 11:39:17,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-22 11:39:17,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-22 11:39:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-22 11:39:17,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 11:39:20,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897442294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:20,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:20,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 39] total 47 [2021-12-22 11:39:20,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148203571] [2021-12-22 11:39:20,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-22 11:39:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-22 11:39:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2008, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 11:39:20,449 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 32 states have internal predecessors, (78), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2021-12-22 11:39:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:21,234 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-12-22 11:39:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 11:39:21,235 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 32 states have internal predecessors, (78), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 89 [2021-12-22 11:39:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:21,235 INFO L225 Difference]: With dead ends: 93 [2021-12-22 11:39:21,235 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 11:39:21,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 172 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=417, Invalid=4695, Unknown=0, NotChecked=0, Total=5112 [2021-12-22 11:39:21,237 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:21,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 520 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:39:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 11:39:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-12-22 11:39:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-22 11:39:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-12-22 11:39:21,241 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2021-12-22 11:39:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:21,241 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-12-22 11:39:21,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 32 states have internal predecessors, (78), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2021-12-22 11:39:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-12-22 11:39:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 11:39:21,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:21,242 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:21,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:21,447 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,SelfDestructingSolverStorable14 [2021-12-22 11:39:21,447 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:21,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2021-12-22 11:39:21,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:21,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347156164] [2021-12-22 11:39:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:21,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:21,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:22,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:22,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-22 11:39:22,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:22,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347156164] [2021-12-22 11:39:22,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347156164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:22,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713898599] [2021-12-22 11:39:22,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 11:39:22,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:22,145 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) [2021-12-22 11:39:22,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 11:39:22,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-22 11:39:22,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-22 11:39:22,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-22 11:39:22,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 11:39:25,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713898599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:25,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:25,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 42] total 51 [2021-12-22 11:39:25,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317355217] [2021-12-22 11:39:25,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:25,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-22 11:39:25,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:25,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-22 11:39:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 11:39:25,556 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 51 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 35 states have internal predecessors, (84), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2021-12-22 11:39:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:26,449 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-12-22 11:39:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 11:39:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 35 states have internal predecessors, (84), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) Word has length 96 [2021-12-22 11:39:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:26,460 INFO L225 Difference]: With dead ends: 99 [2021-12-22 11:39:26,460 INFO L226 Difference]: Without dead ends: 95 [2021-12-22 11:39:26,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 184 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=452, Invalid=5400, Unknown=0, NotChecked=0, Total=5852 [2021-12-22 11:39:26,461 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:26,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 706 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:39:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-22 11:39:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2021-12-22 11:39:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-22 11:39:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-22 11:39:26,470 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2021-12-22 11:39:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:26,471 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-22 11:39:26,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 35 states have internal predecessors, (84), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2021-12-22 11:39:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-22 11:39:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 11:39:26,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:26,472 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:26,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-22 11:39:26,672 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,SelfDestructingSolverStorable15 [2021-12-22 11:39:26,672 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2021-12-22 11:39:26,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:26,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307065246] [2021-12-22 11:39:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:26,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:26,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:26,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:26,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:26,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-22 11:39:27,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307065246] [2021-12-22 11:39:27,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307065246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898913065] [2021-12-22 11:39:27,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 11:39:27,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:27,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:27,348 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) [2021-12-22 11:39:27,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 11:39:27,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-22 11:39:27,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-22 11:39:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-22 11:39:27,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 11:39:31,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898913065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:31,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:31,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 45] total 53 [2021-12-22 11:39:31,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950440258] [2021-12-22 11:39:31,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:31,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-22 11:39:31,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-22 11:39:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2581, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 11:39:31,134 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 53 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 36 states have internal predecessors, (88), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2021-12-22 11:39:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:32,174 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-12-22 11:39:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-22 11:39:32,174 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 36 states have internal predecessors, (88), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 103 [2021-12-22 11:39:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:32,177 INFO L225 Difference]: With dead ends: 105 [2021-12-22 11:39:32,177 INFO L226 Difference]: Without dead ends: 101 [2021-12-22 11:39:32,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 201 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=509, Invalid=6133, Unknown=0, NotChecked=0, Total=6642 [2021-12-22 11:39:32,179 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:32,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 643 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:39:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-22 11:39:32,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2021-12-22 11:39:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-22 11:39:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-12-22 11:39:32,183 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2021-12-22 11:39:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:32,183 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-12-22 11:39:32,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 36 states have internal predecessors, (88), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2021-12-22 11:39:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-12-22 11:39:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-22 11:39:32,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:32,184 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:32,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:32,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 11:39:32,395 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:32,396 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2021-12-22 11:39:32,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:32,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806999945] [2021-12-22 11:39:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:32,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:33,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:33,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:33,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-22 11:39:33,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806999945] [2021-12-22 11:39:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806999945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314008676] [2021-12-22 11:39:33,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 11:39:33,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:33,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:33,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:39:33,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 11:39:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-22 11:39:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-22 11:39:33,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-22 11:39:37,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314008676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:37,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:37,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 48] total 57 [2021-12-22 11:39:37,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029782647] [2021-12-22 11:39:37,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:37,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-22 11:39:37,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-22 11:39:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2021-12-22 11:39:37,503 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2021-12-22 11:39:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:38,541 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-12-22 11:39:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 11:39:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 110 [2021-12-22 11:39:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:38,542 INFO L225 Difference]: With dead ends: 111 [2021-12-22 11:39:38,542 INFO L226 Difference]: Without dead ends: 107 [2021-12-22 11:39:38,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 212 SyntacticMatches, 16 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=547, Invalid=6935, Unknown=0, NotChecked=0, Total=7482 [2021-12-22 11:39:38,545 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:38,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 666 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:39:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-22 11:39:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2021-12-22 11:39:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-22 11:39:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-12-22 11:39:38,551 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2021-12-22 11:39:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:38,552 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-12-22 11:39:38,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2021-12-22 11:39:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-12-22 11:39:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-22 11:39:38,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:38,555 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:38,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:38,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 11:39:38,759 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2021-12-22 11:39:38,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35442924] [2021-12-22 11:39:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:38,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:38,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:38,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:38,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:38,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-22 11:39:39,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:39,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35442924] [2021-12-22 11:39:39,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35442924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:39,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19434200] [2021-12-22 11:39:39,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 11:39:39,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:39,647 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:39:39,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 11:39:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-22 11:39:39,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-22 11:39:40,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 11:39:44,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19434200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:44,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:44,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 51] total 59 [2021-12-22 11:39:44,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545136974] [2021-12-22 11:39:44,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:44,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-22 11:39:44,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-22 11:39:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3224, Unknown=0, NotChecked=0, Total=3422 [2021-12-22 11:39:44,142 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 59 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 40 states have internal predecessors, (98), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2021-12-22 11:39:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:45,455 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-12-22 11:39:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-22 11:39:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 40 states have internal predecessors, (98), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) Word has length 117 [2021-12-22 11:39:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:45,456 INFO L225 Difference]: With dead ends: 117 [2021-12-22 11:39:45,456 INFO L226 Difference]: Without dead ends: 113 [2021-12-22 11:39:45,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 228 SyntacticMatches, 16 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=611, Invalid=7761, Unknown=0, NotChecked=0, Total=8372 [2021-12-22 11:39:45,458 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:45,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 850 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 11:39:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-22 11:39:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2021-12-22 11:39:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 11:39:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-12-22 11:39:45,461 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2021-12-22 11:39:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:45,461 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-12-22 11:39:45,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 40 states have internal predecessors, (98), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2021-12-22 11:39:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-12-22 11:39:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 11:39:45,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:45,462 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:45,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-22 11:39:45,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:45,675 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2021-12-22 11:39:45,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:45,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413342327] [2021-12-22 11:39:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:45,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:45,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:45,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:45,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:45,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-22 11:39:46,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:46,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413342327] [2021-12-22 11:39:46,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413342327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:46,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371445919] [2021-12-22 11:39:46,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:39:46,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:46,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:46,638 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:39:46,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 11:39:46,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:39:46,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:46,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-22 11:39:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-22 11:39:47,297 INFO L328 TraceCheckSpWp]: Computing backward predicates...