./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-17 15:10:18,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:10:18,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:10:18,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:10:18,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:10:18,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:10:18,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:10:18,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:10:18,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:10:18,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:10:18,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:10:18,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:10:18,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:10:18,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:10:18,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:10:18,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:10:18,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:10:18,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:10:18,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:10:18,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:10:18,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:10:18,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:10:18,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:10:18,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:10:18,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:10:18,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:10:18,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:10:18,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:10:18,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:10:18,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:10:18,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:10:18,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:10:18,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:10:18,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:10:18,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:10:18,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:10:18,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:10:18,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:10:18,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:10:18,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:10:18,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:10:18,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:10:18,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:10:18,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:10:18,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:10:18,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:10:18,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:10:18,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:10:18,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:10:18,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:10:18,715 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:10:18,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:10:18,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:10:18,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:10:18,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:10:18,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:10:18,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:10:18,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:10:18,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:10:18,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:10:18,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:10:18,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:10:18,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:10:18,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:10:18,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:10:18,719 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:10:18,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:10:18,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:10:18,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:10:18,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2021-12-17 15:10:18,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:10:18,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:10:18,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:10:18,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:10:18,924 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:10:18,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-12-17 15:10:18,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77988a6f3/97dbc462fc3f40719f0074962e338517/FLAG18e6b062c [2021-12-17 15:10:19,347 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:10:19,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-12-17 15:10:19,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77988a6f3/97dbc462fc3f40719f0074962e338517/FLAG18e6b062c [2021-12-17 15:10:19,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77988a6f3/97dbc462fc3f40719f0074962e338517 [2021-12-17 15:10:19,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:10:19,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:10:19,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:10:19,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:10:19,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:10:19,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749551cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19, skipping insertion in model container [2021-12-17 15:10:19,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:10:19,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:10:19,564 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] [2021-12-17 15:10:19,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:10:19,574 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:10:19,588 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] [2021-12-17 15:10:19,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:10:19,599 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:10:19,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19 WrapperNode [2021-12-17 15:10:19,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:10:19,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:10:19,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:10:19,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:10:19,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,623 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2021-12-17 15:10:19,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:10:19,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:10:19,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:10:19,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:10:19,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:10:19,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:10:19,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:10:19,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:10:19,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (1/1) ... [2021-12-17 15:10:19,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:10:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:19,693 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) [2021-12-17 15:10:19,696 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 [2021-12-17 15:10:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:10:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-12-17 15:10:19,726 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-12-17 15:10:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:10:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-12-17 15:10:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-12-17 15:10:19,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:10:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:10:19,766 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:10:19,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:10:19,891 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:10:19,894 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:10:19,895 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 15:10:19,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:10:19 BoogieIcfgContainer [2021-12-17 15:10:19,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:10:19,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:10:19,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:10:19,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:10:19,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:10:19" (1/3) ... [2021-12-17 15:10:19,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1f81df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:10:19, skipping insertion in model container [2021-12-17 15:10:19,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:19" (2/3) ... [2021-12-17 15:10:19,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1f81df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:10:19, skipping insertion in model container [2021-12-17 15:10:19,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:10:19" (3/3) ... [2021-12-17 15:10:19,916 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2021-12-17 15:10:19,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:10:19,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:10:19,947 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:10:19,952 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 [2021-12-17 15:10:19,961 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:10:19,990 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) [2021-12-17 15:10:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 15:10:19,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:19,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:19,994 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2021-12-17 15:10:20,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:20,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819363273] [2021-12-17 15:10:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:20,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:20,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:20,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819363273] [2021-12-17 15:10:20,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819363273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:20,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:20,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:10:20,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784508624] [2021-12-17 15:10:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:20,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:10:20,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:10:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:10:20,440 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) [2021-12-17 15:10:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:20,525 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-12-17 15:10:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 15:10:20,528 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 [2021-12-17 15:10:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:20,533 INFO L225 Difference]: With dead ends: 37 [2021-12-17 15:10:20,533 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 15:10:20,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:10:20,540 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 [2021-12-17 15:10:20,540 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] [2021-12-17 15:10:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 15:10:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 15:10:20,566 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) [2021-12-17 15:10:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-17 15:10:20,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2021-12-17 15:10:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:20,569 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-17 15:10:20,569 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) [2021-12-17 15:10:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-17 15:10:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 15:10:20,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:20,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:20,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:10:20,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2021-12-17 15:10:20,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006413009] [2021-12-17 15:10:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:20,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:20,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006413009] [2021-12-17 15:10:20,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006413009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:20,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:20,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:10:20,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132208560] [2021-12-17 15:10:20,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:20,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:10:20,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:20,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:10:20,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:10:20,792 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) [2021-12-17 15:10:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:20,851 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-17 15:10:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:10:20,852 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 [2021-12-17 15:10:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:20,853 INFO L225 Difference]: With dead ends: 30 [2021-12-17 15:10:20,853 INFO L226 Difference]: Without dead ends: 26 [2021-12-17 15:10:20,856 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 [2021-12-17 15:10:20,858 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 [2021-12-17 15:10:20,858 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] [2021-12-17 15:10:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-17 15:10:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-12-17 15:10:20,866 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) [2021-12-17 15:10:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-17 15:10:20,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2021-12-17 15:10:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-17 15:10:20,870 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) [2021-12-17 15:10:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-17 15:10:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 15:10:20,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:20,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:20,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:10:20,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2021-12-17 15:10:20,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:20,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732571675] [2021-12-17 15:10:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:20,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:20,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:20,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:20,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:20,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732571675] [2021-12-17 15:10:20,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732571675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:20,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:20,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:10:20,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401754183] [2021-12-17 15:10:20,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:20,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:10:20,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:10:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:10:20,916 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) [2021-12-17 15:10:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:20,938 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-17 15:10:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:10:20,939 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 [2021-12-17 15:10:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:20,940 INFO L225 Difference]: With dead ends: 38 [2021-12-17 15:10:20,940 INFO L226 Difference]: Without dead ends: 26 [2021-12-17 15:10:20,940 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 [2021-12-17 15:10:20,941 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 [2021-12-17 15:10:20,941 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] [2021-12-17 15:10:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-17 15:10:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-12-17 15:10:20,944 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) [2021-12-17 15:10:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-17 15:10:20,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2021-12-17 15:10:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:20,945 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-17 15:10:20,945 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) [2021-12-17 15:10:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-17 15:10:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 15:10:20,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:20,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:20,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:10:20,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2021-12-17 15:10:20,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:20,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268797081] [2021-12-17 15:10:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:20,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:21,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:21,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268797081] [2021-12-17 15:10:21,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268797081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:21,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:21,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 15:10:21,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600816660] [2021-12-17 15:10:21,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:21,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:10:21,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:10:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:10:21,079 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 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) [2021-12-17 15:10:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:21,157 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-17 15:10:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:10:21,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 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 [2021-12-17 15:10:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:21,158 INFO L225 Difference]: With dead ends: 33 [2021-12-17 15:10:21,158 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 15:10:21,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:10:21,159 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:21,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 15:10:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-17 15:10:21,162 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) [2021-12-17 15:10:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-17 15:10:21,163 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2021-12-17 15:10:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:21,163 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-17 15:10:21,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 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) [2021-12-17 15:10:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-17 15:10:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 15:10:21,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:21,164 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] [2021-12-17 15:10:21,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:10:21,164 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2021-12-17 15:10:21,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159990449] [2021-12-17 15:10:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:21,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:10:21,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:21,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159990449] [2021-12-17 15:10:21,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159990449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:21,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:21,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:10:21,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390590840] [2021-12-17 15:10:21,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:21,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:10:21,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:10:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:10:21,245 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) [2021-12-17 15:10:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:21,273 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-17 15:10:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:10:21,274 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 [2021-12-17 15:10:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:21,276 INFO L225 Difference]: With dead ends: 39 [2021-12-17 15:10:21,277 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 15:10:21,277 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 [2021-12-17 15:10:21,278 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 [2021-12-17 15:10:21,279 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] [2021-12-17 15:10:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 15:10:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 15:10:21,283 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) [2021-12-17 15:10:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-17 15:10:21,284 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2021-12-17 15:10:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:21,284 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-17 15:10:21,284 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) [2021-12-17 15:10:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-17 15:10:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 15:10:21,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:21,286 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] [2021-12-17 15:10:21,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:10:21,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:21,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2021-12-17 15:10:21,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:21,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314948270] [2021-12-17 15:10:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:21,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:10:21,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314948270] [2021-12-17 15:10:21,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314948270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669639712] [2021-12-17 15:10:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:21,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:21,584 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) [2021-12-17 15:10:21,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:10:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 15:10:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:10:21,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:10:22,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669639712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:22,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:22,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-12-17 15:10:22,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511676056] [2021-12-17 15:10:22,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:22,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 15:10:22,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 15:10:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-12-17 15:10:22,459 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) [2021-12-17 15:10:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:22,641 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-12-17 15:10:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 15:10:22,642 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 [2021-12-17 15:10:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:22,643 INFO L225 Difference]: With dead ends: 39 [2021-12-17 15:10:22,643 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 15:10:22,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:10:22,647 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:22,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 15:10:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-12-17 15:10:22,654 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) [2021-12-17 15:10:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-17 15:10:22,655 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2021-12-17 15:10:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:22,655 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-17 15:10:22,656 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) [2021-12-17 15:10:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-17 15:10:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 15:10:22,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:22,657 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] [2021-12-17 15:10:22,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:22,874 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 [2021-12-17 15:10:22,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2021-12-17 15:10:22,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:22,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095962241] [2021-12-17 15:10:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:22,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:22,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:23,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 15:10:23,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095962241] [2021-12-17 15:10:23,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095962241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73294717] [2021-12-17 15:10:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:23,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:23,069 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) [2021-12-17 15:10:23,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 15:10:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:23,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:10:23,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 15:10:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:10:23,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73294717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:23,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:23,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 23 [2021-12-17 15:10:23,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941304324] [2021-12-17 15:10:23,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:23,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 15:10:23,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:23,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 15:10:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-12-17 15:10:23,865 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) [2021-12-17 15:10:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:24,111 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-12-17 15:10:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:10:24,111 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 [2021-12-17 15:10:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:24,112 INFO L225 Difference]: With dead ends: 45 [2021-12-17 15:10:24,112 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 15:10:24,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-12-17 15:10:24,113 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:24,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 184 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 15:10:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-12-17 15:10:24,115 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) [2021-12-17 15:10:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-17 15:10:24,116 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2021-12-17 15:10:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:24,116 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-17 15:10:24,116 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) [2021-12-17 15:10:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-17 15:10:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 15:10:24,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:24,117 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] [2021-12-17 15:10:24,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 15:10:24,317 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 [2021-12-17 15:10:24,317 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:24,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2021-12-17 15:10:24,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:24,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918293472] [2021-12-17 15:10:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:24,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:24,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:24,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 15:10:24,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:24,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918293472] [2021-12-17 15:10:24,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918293472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:24,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870870447] [2021-12-17 15:10:24,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:10:24,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:24,596 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) [2021-12-17 15:10:24,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 15:10:24,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:10:24,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:24,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 15:10:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 15:10:24,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:10:25,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870870447] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:25,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:25,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2021-12-17 15:10:25,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169135630] [2021-12-17 15:10:25,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:25,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 15:10:25,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 15:10:25,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:10:25,629 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) [2021-12-17 15:10:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:25,872 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-17 15:10:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 15:10:25,873 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 [2021-12-17 15:10:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:25,874 INFO L225 Difference]: With dead ends: 51 [2021-12-17 15:10:25,874 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 15:10:25,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 15:10:25,874 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:25,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 206 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 15:10:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-17 15:10:25,877 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) [2021-12-17 15:10:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-17 15:10:25,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2021-12-17 15:10:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:25,878 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-17 15:10:25,878 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) [2021-12-17 15:10:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-17 15:10:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 15:10:25,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:25,879 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] [2021-12-17 15:10:25,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:26,091 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 [2021-12-17 15:10:26,091 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2021-12-17 15:10:26,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838005640] [2021-12-17 15:10:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:26,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:26,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:26,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:26,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:26,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:26,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:26,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 15:10:26,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838005640] [2021-12-17 15:10:26,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838005640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959284503] [2021-12-17 15:10:26,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:10:26,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:26,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:26,352 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) [2021-12-17 15:10:26,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 15:10:26,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:10:26,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:26,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 15:10:26,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 15:10:26,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:27,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959284503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:27,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:27,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 21] total 29 [2021-12-17 15:10:27,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111310881] [2021-12-17 15:10:27,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:27,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 15:10:27,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 15:10:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-12-17 15:10:27,635 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-17 15:10:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:27,998 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-12-17 15:10:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 15:10:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 47 [2021-12-17 15:10:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:27,999 INFO L225 Difference]: With dead ends: 57 [2021-12-17 15:10:27,999 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 15:10:28,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 15:10:28,000 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:28,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 278 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:10:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 15:10:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-12-17 15:10:28,003 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) [2021-12-17 15:10:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-12-17 15:10:28,003 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2021-12-17 15:10:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:28,004 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-12-17 15:10:28,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-17 15:10:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-12-17 15:10:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 15:10:28,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:28,004 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] [2021-12-17 15:10:28,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:28,219 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 [2021-12-17 15:10:28,219 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2021-12-17 15:10:28,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:28,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973799795] [2021-12-17 15:10:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:28,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 15:10:28,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:28,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973799795] [2021-12-17 15:10:28,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973799795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:28,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909638016] [2021-12-17 15:10:28,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:10:28,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:28,575 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) [2021-12-17 15:10:28,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 15:10:28,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 15:10:28,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:28,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 15:10:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 15:10:28,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:10:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909638016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:30,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:30,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 33 [2021-12-17 15:10:30,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599690038] [2021-12-17 15:10:30,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:30,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 15:10:30,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 15:10:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 15:10:30,065 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) [2021-12-17 15:10:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:30,446 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-12-17 15:10:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:10:30,447 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 [2021-12-17 15:10:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:30,448 INFO L225 Difference]: With dead ends: 63 [2021-12-17 15:10:30,448 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 15:10:30,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 15:10:30,449 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:30,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 297 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:10:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 15:10:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2021-12-17 15:10:30,452 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) [2021-12-17 15:10:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-12-17 15:10:30,453 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2021-12-17 15:10:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:30,453 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-12-17 15:10:30,453 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) [2021-12-17 15:10:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-12-17 15:10:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 15:10:30,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:30,454 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] [2021-12-17 15:10:30,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:30,654 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 [2021-12-17 15:10:30,654 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2021-12-17 15:10:30,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:30,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161339386] [2021-12-17 15:10:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:30,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 15:10:30,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161339386] [2021-12-17 15:10:30,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161339386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:30,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567188468] [2021-12-17 15:10:30,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:10:30,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:30,989 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) [2021-12-17 15:10:31,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 15:10:31,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 15:10:31,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 15:10:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 15:10:31,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 15:10:32,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567188468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:32,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:32,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 27] total 35 [2021-12-17 15:10:32,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250328426] [2021-12-17 15:10:32,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:32,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 15:10:32,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:32,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 15:10:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 15:10:32,690 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) [2021-12-17 15:10:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:33,226 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-12-17 15:10:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 15:10:33,226 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 [2021-12-17 15:10:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:33,227 INFO L225 Difference]: With dead ends: 69 [2021-12-17 15:10:33,227 INFO L226 Difference]: Without dead ends: 65 [2021-12-17 15:10:33,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 106 SyntacticMatches, 18 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 15:10:33,228 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:33,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 315 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:10:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-17 15:10:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-12-17 15:10:33,232 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) [2021-12-17 15:10:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-17 15:10:33,232 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2021-12-17 15:10:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:33,232 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-17 15:10:33,233 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) [2021-12-17 15:10:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-17 15:10:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 15:10:33,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:33,233 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] [2021-12-17 15:10:33,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:33,447 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 [2021-12-17 15:10:33,448 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2021-12-17 15:10:33,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083866983] [2021-12-17 15:10:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:33,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 15:10:33,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:33,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083866983] [2021-12-17 15:10:33,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083866983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:33,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289619825] [2021-12-17 15:10:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:10:33,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:33,888 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) [2021-12-17 15:10:33,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 15:10:33,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:10:33,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:33,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-17 15:10:33,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 15:10:34,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 15:10:35,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289619825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:35,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:35,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 30] total 39 [2021-12-17 15:10:35,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934002250] [2021-12-17 15:10:35,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 15:10:35,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 15:10:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 15:10:35,945 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) [2021-12-17 15:10:36,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:36,438 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-12-17 15:10:36,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 15:10:36,439 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 [2021-12-17 15:10:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:36,440 INFO L225 Difference]: With dead ends: 75 [2021-12-17 15:10:36,440 INFO L226 Difference]: Without dead ends: 71 [2021-12-17 15:10:36,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 117 SyntacticMatches, 21 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 15:10:36,441 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:36,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 357 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:10:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-17 15:10:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-12-17 15:10:36,451 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) [2021-12-17 15:10:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-17 15:10:36,452 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2021-12-17 15:10:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:36,452 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-17 15:10:36,453 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) [2021-12-17 15:10:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-17 15:10:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 15:10:36,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:36,456 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] [2021-12-17 15:10:36,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:36,663 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 [2021-12-17 15:10:36,663 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2021-12-17 15:10:36,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:36,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274492747] [2021-12-17 15:10:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:36,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 15:10:37,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274492747] [2021-12-17 15:10:37,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274492747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928659420] [2021-12-17 15:10:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:10:37,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:37,129 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) [2021-12-17 15:10:37,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 15:10:37,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:10:37,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:37,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-17 15:10:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 15:10:37,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 15:10:39,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928659420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:39,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:39,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 33] total 42 [2021-12-17 15:10:39,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869964336] [2021-12-17 15:10:39,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:39,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 15:10:39,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 15:10:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 15:10:39,445 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 42 states, 40 states have (on average 1.725) internal successors, (69), 29 states have internal predecessors, (69), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2021-12-17 15:10:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:40,110 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-12-17 15:10:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 15:10:40,110 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.725) internal successors, (69), 29 states have internal predecessors, (69), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) Word has length 75 [2021-12-17 15:10:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:40,111 INFO L225 Difference]: With dead ends: 81 [2021-12-17 15:10:40,111 INFO L226 Difference]: Without dead ends: 77 [2021-12-17 15:10:40,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 131 SyntacticMatches, 22 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=337, Invalid=3569, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 15:10:40,113 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:40,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 487 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:10:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-17 15:10:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-12-17 15:10:40,121 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) [2021-12-17 15:10:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-12-17 15:10:40,122 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2021-12-17 15:10:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:40,122 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-12-17 15:10:40,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.725) internal successors, (69), 29 states have internal predecessors, (69), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2021-12-17 15:10:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-12-17 15:10:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 15:10:40,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:40,123 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] [2021-12-17 15:10:40,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:40,340 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 [2021-12-17 15:10:40,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2021-12-17 15:10:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450087084] [2021-12-17 15:10:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:40,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 15:10:40,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:40,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450087084] [2021-12-17 15:10:40,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450087084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:40,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145078458] [2021-12-17 15:10:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:10:40,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:40,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:40,938 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) [2021-12-17 15:10:40,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 15:10:41,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 15:10:41,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-17 15:10:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 15:10:41,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 15:10:43,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145078458] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:43,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:43,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 36] total 45 [2021-12-17 15:10:43,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034078444] [2021-12-17 15:10:43,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:43,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 15:10:43,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 15:10:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 15:10:43,657 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) [2021-12-17 15:10:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:44,379 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-12-17 15:10:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 15:10:44,379 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 [2021-12-17 15:10:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:44,380 INFO L225 Difference]: With dead ends: 87 [2021-12-17 15:10:44,380 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 15:10:44,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 142 SyntacticMatches, 26 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=4057, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 15:10:44,382 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:44,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 551 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:10:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 15:10:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-12-17 15:10:44,387 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) [2021-12-17 15:10:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-17 15:10:44,387 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2021-12-17 15:10:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:44,387 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-17 15:10:44,387 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) [2021-12-17 15:10:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-17 15:10:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 15:10:44,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:44,388 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] [2021-12-17 15:10:44,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:44,588 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 [2021-12-17 15:10:44,589 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2021-12-17 15:10:44,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936890003] [2021-12-17 15:10:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:44,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:45,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:45,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 15:10:45,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936890003] [2021-12-17 15:10:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936890003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090105623] [2021-12-17 15:10:45,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:10:45,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:45,139 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) [2021-12-17 15:10:45,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 15:10:45,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 15:10:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:45,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-17 15:10:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 15:10:45,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 15:10:48,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090105623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:48,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:48,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 39] total 47 [2021-12-17 15:10:48,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20266331] [2021-12-17 15:10:48,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:48,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 15:10:48,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 15:10:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2008, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 15:10:48,189 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) [2021-12-17 15:10:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:48,987 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-12-17 15:10:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 15:10:48,987 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 [2021-12-17 15:10:48,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:48,988 INFO L225 Difference]: With dead ends: 93 [2021-12-17 15:10:48,988 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 15:10:48,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 156 SyntacticMatches, 28 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=417, Invalid=4695, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 15:10:48,992 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:48,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 500 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:10:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 15:10:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-12-17 15:10:48,994 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) [2021-12-17 15:10:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-12-17 15:10:48,995 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2021-12-17 15:10:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:48,995 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-12-17 15:10:48,996 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) [2021-12-17 15:10:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-12-17 15:10:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 15:10:48,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:48,996 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] [2021-12-17 15:10:49,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:49,213 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 [2021-12-17 15:10:49,214 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2021-12-17 15:10:49,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446362556] [2021-12-17 15:10:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:49,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-17 15:10:49,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:49,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446362556] [2021-12-17 15:10:49,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446362556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:49,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938550327] [2021-12-17 15:10:49,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:10:49,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:49,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:49,908 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) [2021-12-17 15:10:49,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 15:10:50,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 15:10:50,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-17 15:10:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-17 15:10:50,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 15:10:53,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938550327] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:53,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:53,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 42] total 51 [2021-12-17 15:10:53,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702819571] [2021-12-17 15:10:53,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:53,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 15:10:53,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 15:10:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 15:10:53,491 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) [2021-12-17 15:10:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:54,350 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-12-17 15:10:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 15:10:54,350 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 [2021-12-17 15:10:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:54,351 INFO L225 Difference]: With dead ends: 99 [2021-12-17 15:10:54,351 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 15:10:54,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 167 SyntacticMatches, 31 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=452, Invalid=5400, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 15:10:54,353 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:54,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 675 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:10:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 15:10:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2021-12-17 15:10:54,355 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) [2021-12-17 15:10:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-17 15:10:54,356 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2021-12-17 15:10:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:54,356 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-17 15:10:54,356 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) [2021-12-17 15:10:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-17 15:10:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 15:10:54,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:54,357 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] [2021-12-17 15:10:54,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:54,567 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 [2021-12-17 15:10:54,568 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2021-12-17 15:10:54,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153114892] [2021-12-17 15:10:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:54,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:54,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:55,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:55,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:55,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:55,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-17 15:10:55,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:55,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153114892] [2021-12-17 15:10:55,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153114892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:55,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297893716] [2021-12-17 15:10:55,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:10:55,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:55,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:55,264 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) [2021-12-17 15:10:55,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 15:10:55,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 15:10:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-17 15:10:55,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-17 15:10:55,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 15:10:59,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297893716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:59,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:59,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 45] total 53 [2021-12-17 15:10:59,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195087187] [2021-12-17 15:10:59,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:59,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 15:10:59,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:59,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 15:10:59,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2580, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 15:10:59,132 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) [2021-12-17 15:11:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:00,227 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-12-17 15:11:00,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 15:11:00,227 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 [2021-12-17 15:11:00,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:00,228 INFO L225 Difference]: With dead ends: 105 [2021-12-17 15:11:00,228 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 15:11:00,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 182 SyntacticMatches, 32 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=510, Invalid=6132, Unknown=0, NotChecked=0, Total=6642 [2021-12-17 15:11:00,230 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:00,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 792 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:11:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 15:11:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2021-12-17 15:11:00,236 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) [2021-12-17 15:11:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-12-17 15:11:00,236 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2021-12-17 15:11:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:00,236 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-12-17 15:11:00,237 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) [2021-12-17 15:11:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-12-17 15:11:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 15:11:00,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:00,238 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] [2021-12-17 15:11:00,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-17 15:11:00,451 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 [2021-12-17 15:11:00,451 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:00,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:00,452 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2021-12-17 15:11:00,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:00,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308015446] [2021-12-17 15:11:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:00,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:01,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-17 15:11:01,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:01,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308015446] [2021-12-17 15:11:01,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308015446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:01,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166847994] [2021-12-17 15:11:01,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:11:01,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:01,203 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) [2021-12-17 15:11:01,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 15:11:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:01,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-17 15:11:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-17 15:11:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 15:11:05,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166847994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:05,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:05,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 48] total 57 [2021-12-17 15:11:05,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356463590] [2021-12-17 15:11:05,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:05,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 15:11:05,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:05,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 15:11:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 15:11:05,493 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) [2021-12-17 15:11:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:06,522 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-12-17 15:11:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 15:11:06,522 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 [2021-12-17 15:11:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:06,523 INFO L225 Difference]: With dead ends: 111 [2021-12-17 15:11:06,523 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 15:11:06,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 193 SyntacticMatches, 35 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=547, Invalid=6935, Unknown=0, NotChecked=0, Total=7482 [2021-12-17 15:11:06,526 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:06,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 730 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:11:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 15:11:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2021-12-17 15:11:06,532 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) [2021-12-17 15:11:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-12-17 15:11:06,533 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2021-12-17 15:11:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-12-17 15:11:06,533 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) [2021-12-17 15:11:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-12-17 15:11:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 15:11:06,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:06,534 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] [2021-12-17 15:11:06,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:06,751 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 [2021-12-17 15:11:06,752 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2021-12-17 15:11:06,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136954471] [2021-12-17 15:11:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:06,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:06,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:06,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:06,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:06,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:06,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-17 15:11:07,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:07,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136954471] [2021-12-17 15:11:07,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136954471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:07,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516038098] [2021-12-17 15:11:07,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:11:07,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:07,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:07,615 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) [2021-12-17 15:11:07,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 15:11:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-17 15:11:07,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-17 15:11:08,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-17 15:11:12,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516038098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:12,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:12,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 51] total 60 [2021-12-17 15:11:12,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46412929] [2021-12-17 15:11:12,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 15:11:12,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 15:11:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3338, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 15:11:12,234 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 60 states, 58 states have (on average 1.706896551724138) internal successors, (99), 41 states have internal predecessors, (99), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2021-12-17 15:11:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:13,481 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-12-17 15:11:13,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 15:11:13,481 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 1.706896551724138) internal successors, (99), 41 states have internal predecessors, (99), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) Word has length 117 [2021-12-17 15:11:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:13,482 INFO L225 Difference]: With dead ends: 117 [2021-12-17 15:11:13,482 INFO L226 Difference]: Without dead ends: 113 [2021-12-17 15:11:13,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 208 SyntacticMatches, 35 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=616, Invalid=7940, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 15:11:13,484 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:13,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 934 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:11:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-17 15:11:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2021-12-17 15:11:13,486 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) [2021-12-17 15:11:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-12-17 15:11:13,487 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2021-12-17 15:11:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:13,487 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-12-17 15:11:13,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 1.706896551724138) internal successors, (99), 41 states have internal predecessors, (99), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2021-12-17 15:11:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-12-17 15:11:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-17 15:11:13,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:13,488 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] [2021-12-17 15:11:13,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:13,703 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 [2021-12-17 15:11:13,703 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2021-12-17 15:11:13,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351688519] [2021-12-17 15:11:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:13,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:13,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:13,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:13,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:13,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-17 15:11:14,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351688519] [2021-12-17 15:11:14,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351688519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915507299] [2021-12-17 15:11:14,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:11:14,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:14,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:14,636 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) [2021-12-17 15:11:14,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 15:11:14,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:11:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-17 15:11:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-17 15:11:15,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 15:11:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915507299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:19,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:19,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 54] total 63 [2021-12-17 15:11:19,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340378989] [2021-12-17 15:11:19,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:19,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-17 15:11:19,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:19,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-17 15:11:19,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3692, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 15:11:19,750 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 63 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 43 states have internal predecessors, (104), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2021-12-17 15:11:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:21,032 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2021-12-17 15:11:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 15:11:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 43 states have internal predecessors, (104), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) Word has length 124 [2021-12-17 15:11:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:21,036 INFO L225 Difference]: With dead ends: 123 [2021-12-17 15:11:21,037 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 15:11:21,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 219 SyntacticMatches, 39 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=650, Invalid=8662, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 15:11:21,038 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:21,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1009 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:11:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 15:11:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2021-12-17 15:11:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-17 15:11:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-12-17 15:11:21,047 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2021-12-17 15:11:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:21,048 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-12-17 15:11:21,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 43 states have internal predecessors, (104), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2021-12-17 15:11:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-12-17 15:11:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 15:11:21,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:21,049 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:11:21,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-17 15:11:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:21,264 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2021-12-17 15:11:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424454867] [2021-12-17 15:11:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:21,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:21,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:22,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:22,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-17 15:11:22,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424454867] [2021-12-17 15:11:22,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424454867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:22,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351506503] [2021-12-17 15:11:22,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:11:22,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:22,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:22,225 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:11:22,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 15:11:22,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:11:22,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-17 15:11:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-17 15:11:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-17 15:11:27,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351506503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:27,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:27,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 57] total 65 [2021-12-17 15:11:27,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150375430] [2021-12-17 15:11:27,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:27,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 15:11:27,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:27,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 15:11:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3940, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 15:11:27,792 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 65 states, 64 states have (on average 1.6875) internal successors, (108), 44 states have internal predecessors, (108), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2021-12-17 15:11:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:29,251 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2021-12-17 15:11:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 15:11:29,252 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.6875) internal successors, (108), 44 states have internal predecessors, (108), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) Word has length 131 [2021-12-17 15:11:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:29,252 INFO L225 Difference]: With dead ends: 129 [2021-12-17 15:11:29,252 INFO L226 Difference]: Without dead ends: 125 [2021-12-17 15:11:29,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 234 SyntacticMatches, 40 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=720, Invalid=9582, Unknown=0, NotChecked=0, Total=10302 [2021-12-17 15:11:29,254 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:29,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 923 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:11:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-17 15:11:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-12-17 15:11:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-17 15:11:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-17 15:11:29,257 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2021-12-17 15:11:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:29,258 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-17 15:11:29,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.6875) internal successors, (108), 44 states have internal predecessors, (108), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2021-12-17 15:11:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-17 15:11:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 15:11:29,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:29,259 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:11:29,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:29,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:29,476 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2021-12-17 15:11:29,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:29,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739292487] [2021-12-17 15:11:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:29,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:29,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-17 15:11:30,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:30,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739292487] [2021-12-17 15:11:30,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739292487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:30,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123190502] [2021-12-17 15:11:30,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:11:30,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:30,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:30,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:11:30,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 15:11:30,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 15:11:30,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-17 15:11:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-17 15:11:31,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 15:11:36,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123190502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:36,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:36,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 60] total 69 [2021-12-17 15:11:36,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202599066] [2021-12-17 15:11:36,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:36,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 15:11:36,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:36,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 15:11:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4456, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 15:11:36,800 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 47 states have internal predecessors, (114), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2021-12-17 15:11:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:38,380 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-12-17 15:11:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 15:11:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 47 states have internal predecessors, (114), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) Word has length 138 [2021-12-17 15:11:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:38,382 INFO L225 Difference]: With dead ends: 135 [2021-12-17 15:11:38,382 INFO L226 Difference]: Without dead ends: 131 [2021-12-17 15:11:38,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 247 SyntacticMatches, 41 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=761, Invalid=10581, Unknown=0, NotChecked=0, Total=11342 [2021-12-17 15:11:38,384 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:38,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1243 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2119 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 15:11:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-17 15:11:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2021-12-17 15:11:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-17 15:11:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-17 15:11:38,387 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2021-12-17 15:11:38,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:38,388 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-17 15:11:38,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 47 states have internal predecessors, (114), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2021-12-17 15:11:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-17 15:11:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 15:11:38,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:38,389 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:11:38,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:38,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:38,603 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2021-12-17 15:11:38,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114743036] [2021-12-17 15:11:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:38,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:38,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-17 15:11:39,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:39,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114743036] [2021-12-17 15:11:39,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114743036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:39,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353118005] [2021-12-17 15:11:39,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:11:39,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:39,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:39,721 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:11:39,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 15:11:39,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 15:11:39,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:39,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-17 15:11:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-17 15:11:40,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 15:11:46,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353118005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:46,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:46,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 63] total 71 [2021-12-17 15:11:46,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033151837] [2021-12-17 15:11:46,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:46,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-17 15:11:46,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:46,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-17 15:11:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4728, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 15:11:46,167 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 71 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 48 states have internal predecessors, (118), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2021-12-17 15:11:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:47,895 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-12-17 15:11:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 15:11:47,896 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 48 states have internal predecessors, (118), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) Word has length 145 [2021-12-17 15:11:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:47,897 INFO L225 Difference]: With dead ends: 141 [2021-12-17 15:11:47,897 INFO L226 Difference]: Without dead ends: 137 [2021-12-17 15:11:47,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 260 SyntacticMatches, 44 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=837, Invalid=11595, Unknown=0, NotChecked=0, Total=12432 [2021-12-17 15:11:47,898 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:47,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1196 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 15:11:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-17 15:11:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2021-12-17 15:11:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2021-12-17 15:11:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-12-17 15:11:47,901 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2021-12-17 15:11:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:47,902 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-12-17 15:11:47,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 48 states have internal predecessors, (118), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2021-12-17 15:11:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-12-17 15:11:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 15:11:47,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:47,903 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:11:47,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:48,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:48,120 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2021-12-17 15:11:48,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:48,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151405849] [2021-12-17 15:11:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:48,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:48,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:49,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:49,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:49,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:49,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:49,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-12-17 15:11:49,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151405849] [2021-12-17 15:11:49,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151405849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372536991] [2021-12-17 15:11:49,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:11:49,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:49,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:49,400 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:11:49,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 15:11:49,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:11:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:49,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 176 conjunts are in the unsatisfiable core [2021-12-17 15:11:49,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-12-17 15:11:50,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 15:11:56,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372536991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:56,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:56,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 66] total 75 [2021-12-17 15:11:56,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626284799] [2021-12-17 15:11:56,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:56,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 15:11:56,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 15:11:56,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5292, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 15:11:56,482 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 75 states, 73 states have (on average 1.6986301369863013) internal successors, (124), 51 states have internal predecessors, (124), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2021-12-17 15:11:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:58,319 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2021-12-17 15:11:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 15:11:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 1.6986301369863013) internal successors, (124), 51 states have internal predecessors, (124), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) Word has length 152 [2021-12-17 15:11:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:58,320 INFO L225 Difference]: With dead ends: 147 [2021-12-17 15:11:58,321 INFO L226 Difference]: Without dead ends: 143 [2021-12-17 15:11:58,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 271 SyntacticMatches, 47 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=880, Invalid=12692, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 15:11:58,322 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 33 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 2514 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:58,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1439 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2514 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 15:11:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-17 15:11:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2021-12-17 15:11:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2021-12-17 15:11:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-12-17 15:11:58,326 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2021-12-17 15:11:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:58,326 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-12-17 15:11:58,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 1.6986301369863013) internal successors, (124), 51 states have internal predecessors, (124), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2021-12-17 15:11:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-12-17 15:11:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 15:11:58,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:58,327 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:11:58,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-17 15:11:58,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:58,543 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2021-12-17 15:11:58,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:58,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117303578] [2021-12-17 15:11:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:58,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:58,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-12-17 15:11:59,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:59,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117303578] [2021-12-17 15:11:59,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117303578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:59,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461515362] [2021-12-17 15:11:59,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:11:59,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:59,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:11:59,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 15:12:00,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:12:00,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:12:00,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 184 conjunts are in the unsatisfiable core [2021-12-17 15:12:00,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:12:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-12-17 15:12:00,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:12:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-17 15:12:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461515362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:12:07,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:12:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 69] total 77 [2021-12-17 15:12:07,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063069705] [2021-12-17 15:12:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:12:07,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-17 15:12:07,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:12:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-17 15:12:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5588, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 15:12:07,433 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 77 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 52 states have internal predecessors, (128), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2021-12-17 15:12:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:12:09,418 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2021-12-17 15:12:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 15:12:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 52 states have internal predecessors, (128), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) Word has length 159 [2021-12-17 15:12:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:12:09,419 INFO L225 Difference]: With dead ends: 153 [2021-12-17 15:12:09,419 INFO L226 Difference]: Without dead ends: 149 [2021-12-17 15:12:09,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 286 SyntacticMatches, 48 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=962, Invalid=13800, Unknown=0, NotChecked=0, Total=14762 [2021-12-17 15:12:09,420 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:12:09,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1480 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 15:12:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-17 15:12:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2021-12-17 15:12:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-17 15:12:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-12-17 15:12:09,423 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2021-12-17 15:12:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:12:09,424 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-12-17 15:12:09,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 52 states have internal predecessors, (128), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2021-12-17 15:12:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-12-17 15:12:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 15:12:09,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:12:09,425 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:12:09,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 15:12:09,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 15:12:09,635 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:12:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:12:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2021-12-17 15:12:09,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:12:09,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649008955] [2021-12-17 15:12:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:12:09,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:12:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:09,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:09,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:09,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:09,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:09,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-12-17 15:12:11,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:12:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649008955] [2021-12-17 15:12:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649008955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:12:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936792973] [2021-12-17 15:12:11,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:12:11,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:12:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:12:11,011 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:12:11,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 15:12:11,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 15:12:11,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:12:11,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-17 15:12:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:12:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-12-17 15:12:12,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:12:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 15:12:19,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936792973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:12:19,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:12:19,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 72] total 81 [2021-12-17 15:12:19,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215831493] [2021-12-17 15:12:19,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:12:19,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-17 15:12:19,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:12:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-17 15:12:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=6200, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 15:12:19,402 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2021-12-17 15:12:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:12:21,436 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2021-12-17 15:12:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 15:12:21,441 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) Word has length 166 [2021-12-17 15:12:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:12:21,442 INFO L225 Difference]: With dead ends: 159 [2021-12-17 15:12:21,442 INFO L226 Difference]: Without dead ends: 155 [2021-12-17 15:12:21,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 295 SyntacticMatches, 53 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1007, Invalid=14995, Unknown=0, NotChecked=0, Total=16002 [2021-12-17 15:12:21,444 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:12:21,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1345 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 15:12:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-17 15:12:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2021-12-17 15:12:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2021-12-17 15:12:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-12-17 15:12:21,448 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2021-12-17 15:12:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:12:21,448 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-12-17 15:12:21,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2021-12-17 15:12:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-12-17 15:12:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-17 15:12:21,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:12:21,450 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:12:21,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-17 15:12:21,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 15:12:21,663 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:12:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:12:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2021-12-17 15:12:21,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:12:21,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057224778] [2021-12-17 15:12:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:12:21,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:12:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:21,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:21,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:21,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:21,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:23,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:23,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-12-17 15:12:23,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:12:23,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057224778] [2021-12-17 15:12:23,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057224778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:12:23,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789988388] [2021-12-17 15:12:23,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:12:23,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:12:23,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:12:23,129 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:12:23,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 15:12:23,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 15:12:23,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:12:23,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 200 conjunts are in the unsatisfiable core [2021-12-17 15:12:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:12:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-12-17 15:12:24,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:12:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 15:12:32,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789988388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:12:32,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:12:32,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 75] total 83 [2021-12-17 15:12:32,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396678711] [2021-12-17 15:12:32,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:12:32,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-17 15:12:32,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:12:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-17 15:12:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=6520, Unknown=0, NotChecked=0, Total=6806 [2021-12-17 15:12:32,005 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 83 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 56 states have internal predecessors, (138), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2021-12-17 15:12:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:12:34,244 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2021-12-17 15:12:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 15:12:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 56 states have internal predecessors, (138), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) Word has length 173 [2021-12-17 15:12:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:12:34,245 INFO L225 Difference]: With dead ends: 165 [2021-12-17 15:12:34,245 INFO L226 Difference]: Without dead ends: 161 [2021-12-17 15:12:34,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 311 SyntacticMatches, 53 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1095, Invalid=16197, Unknown=0, NotChecked=0, Total=17292 [2021-12-17 15:12:34,247 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 104 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:12:34,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1528 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2822 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 15:12:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-17 15:12:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2021-12-17 15:12:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 26 states have call predecessors, (27), 3 states have call successors, (27) [2021-12-17 15:12:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-12-17 15:12:34,250 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2021-12-17 15:12:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:12:34,250 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-12-17 15:12:34,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 56 states have internal predecessors, (138), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2021-12-17 15:12:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-12-17 15:12:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-17 15:12:34,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:12:34,251 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:12:34,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 15:12:34,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 15:12:34,472 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:12:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:12:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2021-12-17 15:12:34,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:12:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099804952] [2021-12-17 15:12:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:12:34,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:12:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:34,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-12-17 15:12:36,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:12:36,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099804952] [2021-12-17 15:12:36,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099804952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:12:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235706622] [2021-12-17 15:12:36,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:12:36,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:12:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:12:36,088 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:12:36,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 15:12:36,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 15:12:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:12:36,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 208 conjunts are in the unsatisfiable core [2021-12-17 15:12:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:12:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-12-17 15:12:37,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:12:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 15:12:45,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235706622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:12:45,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:12:45,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 78] total 87 [2021-12-17 15:12:45,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273025784] [2021-12-17 15:12:45,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:12:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-17 15:12:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:12:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-17 15:12:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=7180, Unknown=0, NotChecked=0, Total=7482 [2021-12-17 15:12:45,845 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 87 states, 85 states have (on average 1.6941176470588235) internal successors, (144), 59 states have internal predecessors, (144), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2021-12-17 15:12:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:12:48,265 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-12-17 15:12:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 15:12:48,266 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 1.6941176470588235) internal successors, (144), 59 states have internal predecessors, (144), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) Word has length 180 [2021-12-17 15:12:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:12:48,267 INFO L225 Difference]: With dead ends: 171 [2021-12-17 15:12:48,267 INFO L226 Difference]: Without dead ends: 167 [2021-12-17 15:12:48,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 320 SyntacticMatches, 58 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1142, Invalid=17490, Unknown=0, NotChecked=0, Total=18632 [2021-12-17 15:12:48,268 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 57 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 3118 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 3118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:12:48,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1779 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 3118 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 15:12:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-17 15:12:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2021-12-17 15:12:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 27 states have call predecessors, (28), 3 states have call successors, (28) [2021-12-17 15:12:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-12-17 15:12:48,271 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2021-12-17 15:12:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:12:48,272 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-12-17 15:12:48,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 1.6941176470588235) internal successors, (144), 59 states have internal predecessors, (144), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2021-12-17 15:12:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-12-17 15:12:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-17 15:12:48,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:12:48,273 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:12:48,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 15:12:48,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:12:48,483 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:12:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:12:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2021-12-17 15:12:48,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:12:48,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466702899] [2021-12-17 15:12:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:12:48,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:12:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:48,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:49,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:50,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:50,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:12:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:12:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-17 15:12:50,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:12:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466702899] [2021-12-17 15:12:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466702899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:12:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989131948] [2021-12-17 15:12:50,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:12:50,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:12:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:12:50,156 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:12:50,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 15:12:50,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 15:12:50,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:12:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 164 conjunts are in the unsatisfiable core [2021-12-17 15:12:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:12:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-17 15:12:53,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:13:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-17 15:13:47,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989131948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:13:47,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:13:47,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58, 81] total 190 [2021-12-17 15:13:47,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808526763] [2021-12-17 15:13:47,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:13:47,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-12-17 15:13:47,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:13:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-12-17 15:13:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=35126, Unknown=0, NotChecked=0, Total=35910 [2021-12-17 15:13:47,182 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 190 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 112 states have internal predecessors, (250), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2021-12-17 15:13:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:13:51,925 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-12-17 15:13:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 15:13:51,925 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 112 states have internal predecessors, (250), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) Word has length 187 [2021-12-17 15:13:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:13:51,926 INFO L225 Difference]: With dead ends: 177 [2021-12-17 15:13:51,926 INFO L226 Difference]: Without dead ends: 173 [2021-12-17 15:13:51,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 267 SyntacticMatches, 26 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11656 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1789, Invalid=57017, Unknown=0, NotChecked=0, Total=58806 [2021-12-17 15:13:51,930 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 2945 mSDsCounter, 0 mSdLazyCounter, 5336 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2983 SdHoareTripleChecker+Invalid, 5377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 5336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:13:51,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 2983 Invalid, 5377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 5336 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 15:13:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-17 15:13:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2021-12-17 15:13:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 28 states have call predecessors, (29), 3 states have call successors, (29) [2021-12-17 15:13:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-12-17 15:13:51,933 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 187 [2021-12-17 15:13:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:13:51,934 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-12-17 15:13:51,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 112 states have internal predecessors, (250), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2021-12-17 15:13:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-12-17 15:13:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 15:13:51,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:13:51,935 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:13:51,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 15:13:52,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 15:13:52,152 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:13:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:13:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1664905904, now seen corresponding path program 13 times [2021-12-17 15:13:52,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:13:52,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217242374] [2021-12-17 15:13:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:13:52,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:13:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:52,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:53,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:13:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-12-17 15:13:54,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:13:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217242374] [2021-12-17 15:13:54,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217242374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:13:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483850316] [2021-12-17 15:13:54,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:13:54,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:13:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:13:54,019 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:13:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 15:13:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:13:54,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 224 conjunts are in the unsatisfiable core [2021-12-17 15:13:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:13:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-12-17 15:13:55,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:14:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 988 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-17 15:14:05,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483850316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:14:05,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:14:05,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 84] total 93 [2021-12-17 15:14:05,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273964706] [2021-12-17 15:14:05,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:14:05,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-17 15:14:05,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:14:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-17 15:14:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=8232, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 15:14:05,758 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 93 states, 91 states have (on average 1.6923076923076923) internal successors, (154), 63 states have internal predecessors, (154), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2021-12-17 15:14:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:14:08,401 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2021-12-17 15:14:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-17 15:14:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 91 states have (on average 1.6923076923076923) internal successors, (154), 63 states have internal predecessors, (154), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) Word has length 194 [2021-12-17 15:14:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:14:08,402 INFO L225 Difference]: With dead ends: 183 [2021-12-17 15:14:08,402 INFO L226 Difference]: Without dead ends: 179 [2021-12-17 15:14:08,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 343 SyntacticMatches, 65 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1285, Invalid=20177, Unknown=0, NotChecked=0, Total=21462 [2021-12-17 15:14:08,404 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 3212 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 3334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:14:08,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1807 Invalid, 3334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3212 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 15:14:08,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-17 15:14:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2021-12-17 15:14:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 2 states have call predecessors, (3), 29 states have return successors, (30), 29 states have call predecessors, (30), 3 states have call successors, (30) [2021-12-17 15:14:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-12-17 15:14:08,408 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 194 [2021-12-17 15:14:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:14:08,408 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-12-17 15:14:08,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 91 states have (on average 1.6923076923076923) internal successors, (154), 63 states have internal predecessors, (154), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2021-12-17 15:14:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-12-17 15:14:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-17 15:14:08,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:14:08,409 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:14:08,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 15:14:08,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:14:08,627 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:14:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:14:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1458999816, now seen corresponding path program 13 times [2021-12-17 15:14:08,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:14:08,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230176234] [2021-12-17 15:14:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:14:08,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:14:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:08,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:08,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:08,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:08,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:08,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:08,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:08,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:09,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:10,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:10,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:10,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:10,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:10,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-17 15:14:10,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:14:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230176234] [2021-12-17 15:14:10,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230176234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:14:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487749377] [2021-12-17 15:14:10,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:14:10,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:14:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:14:10,524 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:14:10,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 15:14:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:11,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 232 conjunts are in the unsatisfiable core [2021-12-17 15:14:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:14:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-17 15:14:12,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:14:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 1066 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-17 15:14:22,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487749377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:14:22,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:14:22,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 87] total 95 [2021-12-17 15:14:22,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311356990] [2021-12-17 15:14:22,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:14:22,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-17 15:14:22,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:14:22,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-17 15:14:22,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=8600, Unknown=0, NotChecked=0, Total=8930 [2021-12-17 15:14:22,868 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 64 states have internal predecessors, (158), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) [2021-12-17 15:14:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:14:25,885 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2021-12-17 15:14:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 15:14:25,886 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 64 states have internal predecessors, (158), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) Word has length 201 [2021-12-17 15:14:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:14:25,886 INFO L225 Difference]: With dead ends: 189 [2021-12-17 15:14:25,886 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 15:14:25,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 363 SyntacticMatches, 61 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1385, Invalid=21567, Unknown=0, NotChecked=0, Total=22952 [2021-12-17 15:14:25,888 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 48 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 3742 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 3784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:14:25,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1962 Invalid, 3784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3742 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 15:14:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 15:14:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 105. [2021-12-17 15:14:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 30 states have call predecessors, (31), 3 states have call successors, (31) [2021-12-17 15:14:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-12-17 15:14:25,891 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 201 [2021-12-17 15:14:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:14:25,892 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-12-17 15:14:25,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 64 states have internal predecessors, (158), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) [2021-12-17 15:14:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-12-17 15:14:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-17 15:14:25,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:14:25,893 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:14:25,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 15:14:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-17 15:14:26,104 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:14:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:14:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash -941688870, now seen corresponding path program 14 times [2021-12-17 15:14:26,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:14:26,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941595828] [2021-12-17 15:14:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:14:26,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:14:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:26,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:27,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:28,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:28,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-12-17 15:14:28,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:14:28,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941595828] [2021-12-17 15:14:28,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941595828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:14:28,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396316876] [2021-12-17 15:14:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:14:28,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:14:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:14:28,160 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:14:28,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 15:14:29,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:14:29,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:14:29,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 240 conjunts are in the unsatisfiable core [2021-12-17 15:14:29,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:14:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-12-17 15:14:30,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:14:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1148 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-17 15:14:41,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396316876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:14:41,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:14:41,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 90] total 99 [2021-12-17 15:14:41,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891987500] [2021-12-17 15:14:41,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:14:41,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-17 15:14:41,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:14:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-17 15:14:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=9356, Unknown=0, NotChecked=0, Total=9702 [2021-12-17 15:14:41,386 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 67 states have internal predecessors, (164), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) [2021-12-17 15:14:44,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:14:44,395 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2021-12-17 15:14:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 15:14:44,395 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 67 states have internal predecessors, (164), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) Word has length 208 [2021-12-17 15:14:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:14:44,396 INFO L225 Difference]: With dead ends: 195 [2021-12-17 15:14:44,396 INFO L226 Difference]: Without dead ends: 191 [2021-12-17 15:14:44,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 370 SyntacticMatches, 68 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1436, Invalid=23056, Unknown=0, NotChecked=0, Total=24492 [2021-12-17 15:14:44,400 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 73 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 3533 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 3753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 3533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:14:44,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 2021 Invalid, 3753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 3533 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 15:14:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-17 15:14:44,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-12-17 15:14:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 31 states have call predecessors, (32), 3 states have call successors, (32) [2021-12-17 15:14:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-12-17 15:14:44,404 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 208 [2021-12-17 15:14:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:14:44,404 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-12-17 15:14:44,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 67 states have internal predecessors, (164), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) [2021-12-17 15:14:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-12-17 15:14:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-17 15:14:44,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:14:44,410 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:14:44,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 15:14:44,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:14:44,611 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:14:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:14:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash 482690706, now seen corresponding path program 14 times [2021-12-17 15:14:44,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:14:44,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928968777] [2021-12-17 15:14:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:14:44,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:14:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:44,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:44,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:44,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:44,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:44,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:45,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:14:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:14:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-12-17 15:14:46,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:14:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928968777] [2021-12-17 15:14:46,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928968777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:14:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736552254] [2021-12-17 15:14:46,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:14:46,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:14:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:14:46,804 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:14:46,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 15:14:47,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:14:47,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:14:47,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 248 conjunts are in the unsatisfiable core [2021-12-17 15:14:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:14:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-12-17 15:14:48,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 1232 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-17 15:15:00,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736552254] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:15:00,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:15:00,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 93] total 101 [2021-12-17 15:15:00,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738058221] [2021-12-17 15:15:00,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:00,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-17 15:15:00,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:00,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-17 15:15:00,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=9748, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 15:15:00,648 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 101 states, 100 states have (on average 1.68) internal successors, (168), 68 states have internal predecessors, (168), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) [2021-12-17 15:15:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:04,182 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2021-12-17 15:15:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-17 15:15:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.68) internal successors, (168), 68 states have internal predecessors, (168), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) Word has length 215 [2021-12-17 15:15:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:04,183 INFO L225 Difference]: With dead ends: 201 [2021-12-17 15:15:04,183 INFO L226 Difference]: Without dead ends: 197 [2021-12-17 15:15:04,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 388 SyntacticMatches, 66 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3362 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1542, Invalid=24540, Unknown=0, NotChecked=0, Total=26082 [2021-12-17 15:15:04,184 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 72 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 4544 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 4603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 4544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:04,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 2460 Invalid, 4603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 4544 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 15:15:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-17 15:15:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2021-12-17 15:15:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 32 states have return successors, (33), 32 states have call predecessors, (33), 3 states have call successors, (33) [2021-12-17 15:15:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-12-17 15:15:04,188 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 215 [2021-12-17 15:15:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:04,188 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-12-17 15:15:04,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 1.68) internal successors, (168), 68 states have internal predecessors, (168), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) [2021-12-17 15:15:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-12-17 15:15:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-17 15:15:04,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:04,190 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:15:04,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:04,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:04,403 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash 837482372, now seen corresponding path program 15 times [2021-12-17 15:15:04,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:04,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529846932] [2021-12-17 15:15:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:04,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:05,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-12-17 15:15:06,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529846932] [2021-12-17 15:15:06,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529846932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945037265] [2021-12-17 15:15:06,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:15:06,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:06,794 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:15:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 15:15:08,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 15:15:08,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:08,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 256 conjunts are in the unsatisfiable core [2021-12-17 15:15:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-12-17 15:15:09,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 1320 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-17 15:15:22,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945037265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:15:22,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:15:22,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 96] total 105 [2021-12-17 15:15:22,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257769330] [2021-12-17 15:15:22,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:22,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-17 15:15:22,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-17 15:15:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=10552, Unknown=0, NotChecked=0, Total=10920 [2021-12-17 15:15:22,139 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 105 states, 103 states have (on average 1.6893203883495145) internal successors, (174), 71 states have internal predecessors, (174), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) [2021-12-17 15:15:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:25,478 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2021-12-17 15:15:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-17 15:15:25,478 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 1.6893203883495145) internal successors, (174), 71 states have internal predecessors, (174), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) Word has length 222 [2021-12-17 15:15:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:25,479 INFO L225 Difference]: With dead ends: 207 [2021-12-17 15:15:25,479 INFO L226 Difference]: Without dead ends: 203 [2021-12-17 15:15:25,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 395 SyntacticMatches, 73 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3836 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1595, Invalid=26127, Unknown=0, NotChecked=0, Total=27722 [2021-12-17 15:15:25,481 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 59 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 3862 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 4280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:25,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 2219 Invalid, 4280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3862 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 15:15:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-17 15:15:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 114. [2021-12-17 15:15:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 33 states have return successors, (34), 33 states have call predecessors, (34), 3 states have call successors, (34) [2021-12-17 15:15:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-12-17 15:15:25,484 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 222 [2021-12-17 15:15:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:25,485 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-12-17 15:15:25,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 1.6893203883495145) internal successors, (174), 71 states have internal predecessors, (174), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) [2021-12-17 15:15:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-12-17 15:15:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-17 15:15:25,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:25,486 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:15:25,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:25,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:25,707 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1020068268, now seen corresponding path program 15 times [2021-12-17 15:15:25,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:25,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994431664] [2021-12-17 15:15:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:25,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:25,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:25,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:25,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:25,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:26,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:28,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:28,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2021-12-17 15:15:28,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:28,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994431664] [2021-12-17 15:15:28,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994431664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:28,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707307703] [2021-12-17 15:15:28,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:15:28,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:28,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:28,191 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:15:28,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 15:15:29,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 15:15:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:29,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 264 conjunts are in the unsatisfiable core [2021-12-17 15:15:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2021-12-17 15:15:30,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1410 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-17 15:15:43,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707307703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:15:43,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:15:43,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 99] total 108 [2021-12-17 15:15:43,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926144979] [2021-12-17 15:15:43,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:43,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-17 15:15:43,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:43,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-17 15:15:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=11178, Unknown=0, NotChecked=0, Total=11556 [2021-12-17 15:15:43,645 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 108 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 73 states have internal predecessors, (179), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) [2021-12-17 15:15:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:47,263 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2021-12-17 15:15:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 15:15:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 73 states have internal predecessors, (179), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) Word has length 229 [2021-12-17 15:15:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:47,264 INFO L225 Difference]: With dead ends: 213 [2021-12-17 15:15:47,264 INFO L226 Difference]: Without dead ends: 209 [2021-12-17 15:15:47,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 413 SyntacticMatches, 70 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3964 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1712, Invalid=28044, Unknown=0, NotChecked=0, Total=29756 [2021-12-17 15:15:47,267 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 4633 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:47,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 2548 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4633 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 15:15:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-17 15:15:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 117. [2021-12-17 15:15:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 34 states have return successors, (35), 34 states have call predecessors, (35), 3 states have call successors, (35) [2021-12-17 15:15:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-12-17 15:15:47,270 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 229 [2021-12-17 15:15:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:47,270 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-12-17 15:15:47,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 73 states have internal predecessors, (179), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) [2021-12-17 15:15:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-12-17 15:15:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-17 15:15:47,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:47,271 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:15:47,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:47,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-17 15:15:47,487 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:47,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1968238162, now seen corresponding path program 16 times [2021-12-17 15:15:47,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:47,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208079844] [2021-12-17 15:15:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:47,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2021-12-17 15:15:50,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208079844] [2021-12-17 15:15:50,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208079844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546681363] [2021-12-17 15:15:50,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:15:50,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:50,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:50,055 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:15:50,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 15:15:51,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:15:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:51,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 272 conjunts are in the unsatisfiable core [2021-12-17 15:15:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2021-12-17 15:15:52,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-12-17 15:16:06,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546681363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:06,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:16:06,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 102] total 111 [2021-12-17 15:16:06,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829595523] [2021-12-17 15:16:06,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:06,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-12-17 15:16:06,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:16:06,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-12-17 15:16:06,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=11820, Unknown=0, NotChecked=0, Total=12210 [2021-12-17 15:16:06,485 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 111 states, 109 states have (on average 1.688073394495413) internal successors, (184), 75 states have internal predecessors, (184), 37 states have call successors, (37), 1 states have call predecessors, (37), 34 states have return successors, (67), 36 states have call predecessors, (67), 37 states have call successors, (67) [2021-12-17 15:16:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:10,302 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-12-17 15:16:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-17 15:16:10,303 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 109 states have (on average 1.688073394495413) internal successors, (184), 75 states have internal predecessors, (184), 37 states have call successors, (37), 1 states have call predecessors, (37), 34 states have return successors, (67), 36 states have call predecessors, (67), 37 states have call successors, (67) Word has length 236 [2021-12-17 15:16:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:10,303 INFO L225 Difference]: With dead ends: 219 [2021-12-17 15:16:10,303 INFO L226 Difference]: Without dead ends: 215 [2021-12-17 15:16:10,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 422 SyntacticMatches, 76 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1762, Invalid=29390, Unknown=0, NotChecked=0, Total=31152 [2021-12-17 15:16:10,306 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 4704 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2678 SdHoareTripleChecker+Invalid, 4852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:10,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 2678 Invalid, 4852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4704 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 15:16:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-17 15:16:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 120. [2021-12-17 15:16:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 35 states have return successors, (36), 35 states have call predecessors, (36), 3 states have call successors, (36) [2021-12-17 15:16:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-12-17 15:16:10,312 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 236 [2021-12-17 15:16:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:10,312 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-12-17 15:16:10,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 109 states have (on average 1.688073394495413) internal successors, (184), 75 states have internal predecessors, (184), 37 states have call successors, (37), 1 states have call predecessors, (37), 34 states have return successors, (67), 36 states have call predecessors, (67), 37 states have call successors, (67) [2021-12-17 15:16:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-12-17 15:16:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-17 15:16:10,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:10,313 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:16:10,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:10,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-17 15:16:10,537 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash 193478470, now seen corresponding path program 16 times [2021-12-17 15:16:10,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:16:10,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131683378] [2021-12-17 15:16:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:10,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:16:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:10,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:10,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:10,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:10,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:10,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:10,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:12,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-12-17 15:16:13,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:16:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131683378] [2021-12-17 15:16:13,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131683378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:16:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208867817] [2021-12-17 15:16:13,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:16:13,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:16:13,201 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:16:13,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 15:16:14,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:16:14,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:16:14,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 280 conjunts are in the unsatisfiable core [2021-12-17 15:16:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-12-17 15:16:15,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 15:16:30,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208867817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:30,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:16:30,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74, 105] total 113 [2021-12-17 15:16:30,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691117188] [2021-12-17 15:16:30,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:30,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-17 15:16:30,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:16:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-17 15:16:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=12260, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 15:16:30,594 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 113 states, 112 states have (on average 1.6785714285714286) internal successors, (188), 76 states have internal predecessors, (188), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (69), 37 states have call predecessors, (69), 37 states have call successors, (69) [2021-12-17 15:16:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:34,865 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2021-12-17 15:16:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-17 15:16:34,879 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 1.6785714285714286) internal successors, (188), 76 states have internal predecessors, (188), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (69), 37 states have call predecessors, (69), 37 states have call successors, (69) Word has length 243 [2021-12-17 15:16:34,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:34,880 INFO L225 Difference]: With dead ends: 225 [2021-12-17 15:16:34,880 INFO L226 Difference]: Without dead ends: 221 [2021-12-17 15:16:34,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 438 SyntacticMatches, 76 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1880, Invalid=31062, Unknown=0, NotChecked=0, Total=32942 [2021-12-17 15:16:34,882 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 2862 mSDsCounter, 0 mSdLazyCounter, 5212 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 5267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:34,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2908 Invalid, 5267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5212 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 15:16:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-17 15:16:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 123. [2021-12-17 15:16:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 36 states have return successors, (37), 36 states have call predecessors, (37), 3 states have call successors, (37) [2021-12-17 15:16:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2021-12-17 15:16:34,886 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 243 [2021-12-17 15:16:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:34,886 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2021-12-17 15:16:34,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 1.6785714285714286) internal successors, (188), 76 states have internal predecessors, (188), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (69), 37 states have call predecessors, (69), 37 states have call successors, (69) [2021-12-17 15:16:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2021-12-17 15:16:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-17 15:16:34,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:34,888 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:16:34,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:35,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:35,103 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1478616664, now seen corresponding path program 17 times [2021-12-17 15:16:35,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:16:35,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149311101] [2021-12-17 15:16:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:35,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:16:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:36,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2021-12-17 15:16:38,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:16:38,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149311101] [2021-12-17 15:16:38,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149311101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:16:38,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596043062] [2021-12-17 15:16:38,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:16:38,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:38,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:16:38,035 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:16:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 15:16:39,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-17 15:16:39,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:16:39,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 288 conjunts are in the unsatisfiable core [2021-12-17 15:16:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2021-12-17 15:16:40,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 1700 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-12-17 15:16:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596043062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:56,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:16:56,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 108] total 117 [2021-12-17 15:16:56,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032695831] [2021-12-17 15:16:56,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-17 15:16:56,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:16:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-17 15:16:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=13160, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 15:16:56,541 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 117 states, 115 states have (on average 1.6869565217391305) internal successors, (194), 79 states have internal predecessors, (194), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (71), 38 states have call predecessors, (71), 39 states have call successors, (71) [2021-12-17 15:17:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:17:00,969 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2021-12-17 15:17:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 15:17:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 115 states have (on average 1.6869565217391305) internal successors, (194), 79 states have internal predecessors, (194), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (71), 38 states have call predecessors, (71), 39 states have call successors, (71) Word has length 250 [2021-12-17 15:17:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:17:00,971 INFO L225 Difference]: With dead ends: 231 [2021-12-17 15:17:00,971 INFO L226 Difference]: Without dead ends: 227 [2021-12-17 15:17:00,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 447 SyntacticMatches, 81 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1937, Invalid=32845, Unknown=0, NotChecked=0, Total=34782 [2021-12-17 15:17:00,976 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 45 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 5608 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3120 SdHoareTripleChecker+Invalid, 6004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 5608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:17:00,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 3120 Invalid, 6004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 5608 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 15:17:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-17 15:17:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 126. [2021-12-17 15:17:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 37 states have return successors, (38), 37 states have call predecessors, (38), 3 states have call successors, (38) [2021-12-17 15:17:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-12-17 15:17:00,979 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 250 [2021-12-17 15:17:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:17:00,980 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-12-17 15:17:00,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 115 states have (on average 1.6869565217391305) internal successors, (194), 79 states have internal predecessors, (194), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (71), 38 states have call predecessors, (71), 39 states have call successors, (71) [2021-12-17 15:17:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-12-17 15:17:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-17 15:17:00,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:17:00,981 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:17:01,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-17 15:17:01,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-17 15:17:01,208 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:17:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:17:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1190748320, now seen corresponding path program 17 times [2021-12-17 15:17:01,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:17:01,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566075870] [2021-12-17 15:17:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:17:01,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:17:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:02,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:03,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:04,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2021-12-17 15:17:04,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:17:04,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566075870] [2021-12-17 15:17:04,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566075870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:17:04,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113380027] [2021-12-17 15:17:04,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:17:04,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:17:04,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:17:04,159 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:17:04,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 15:17:05,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-17 15:17:05,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:17:05,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 296 conjunts are in the unsatisfiable core [2021-12-17 15:17:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2021-12-17 15:17:06,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:17:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 1802 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-12-17 15:17:23,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113380027] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:17:23,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:17:23,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 78, 111] total 119 [2021-12-17 15:17:23,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075630593] [2021-12-17 15:17:23,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:17:23,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-17 15:17:23,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:17:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-17 15:17:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=13624, Unknown=0, NotChecked=0, Total=14042 [2021-12-17 15:17:23,347 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 119 states, 118 states have (on average 1.6779661016949152) internal successors, (198), 80 states have internal predecessors, (198), 39 states have call successors, (39), 1 states have call predecessors, (39), 37 states have return successors, (73), 39 states have call predecessors, (73), 39 states have call successors, (73) [2021-12-17 15:17:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:17:27,824 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2021-12-17 15:17:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 15:17:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 1.6779661016949152) internal successors, (198), 80 states have internal predecessors, (198), 39 states have call successors, (39), 1 states have call predecessors, (39), 37 states have return successors, (73), 39 states have call predecessors, (73), 39 states have call successors, (73) Word has length 257 [2021-12-17 15:17:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:17:27,826 INFO L225 Difference]: With dead ends: 237 [2021-12-17 15:17:27,826 INFO L226 Difference]: Without dead ends: 233 [2021-12-17 15:17:27,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 466 SyntacticMatches, 78 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4545 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2061, Invalid=34611, Unknown=0, NotChecked=0, Total=36672 [2021-12-17 15:17:27,829 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 96 mSDsluCounter, 2689 mSDsCounter, 0 mSdLazyCounter, 5398 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 5469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:17:27,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2737 Invalid, 5469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5398 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 15:17:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-17 15:17:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 129. [2021-12-17 15:17:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 38 states have return successors, (39), 38 states have call predecessors, (39), 3 states have call successors, (39) [2021-12-17 15:17:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2021-12-17 15:17:27,833 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 257 [2021-12-17 15:17:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:17:27,833 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2021-12-17 15:17:27,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 1.6779661016949152) internal successors, (198), 80 states have internal predecessors, (198), 39 states have call successors, (39), 1 states have call predecessors, (39), 37 states have return successors, (73), 39 states have call predecessors, (73), 39 states have call successors, (73) [2021-12-17 15:17:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2021-12-17 15:17:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-17 15:17:27,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:17:27,834 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:17:27,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-17 15:17:28,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 15:17:28,051 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:17:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:17:28,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1726092674, now seen corresponding path program 18 times [2021-12-17 15:17:28,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:17:28,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126518783] [2021-12-17 15:17:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:17:28,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:17:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:29,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:30,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:31,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:31,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2021-12-17 15:17:31,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:17:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126518783] [2021-12-17 15:17:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126518783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:17:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920992135] [2021-12-17 15:17:31,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:17:31,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:17:31,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:17:31,225 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:17:31,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 15:17:32,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 15:17:32,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:17:32,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 304 conjunts are in the unsatisfiable core [2021-12-17 15:17:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2021-12-17 15:17:34,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:17:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 1908 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-17 15:17:51,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920992135] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:17:51,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:17:51,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 114] total 123 [2021-12-17 15:17:51,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308916486] [2021-12-17 15:17:51,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:17:51,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-12-17 15:17:51,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:17:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-12-17 15:17:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=14572, Unknown=0, NotChecked=0, Total=15006 [2021-12-17 15:17:51,740 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 123 states, 121 states have (on average 1.6859504132231404) internal successors, (204), 83 states have internal predecessors, (204), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (75), 40 states have call predecessors, (75), 41 states have call successors, (75) [2021-12-17 15:17:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:17:56,675 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2021-12-17 15:17:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-17 15:17:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 121 states have (on average 1.6859504132231404) internal successors, (204), 83 states have internal predecessors, (204), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (75), 40 states have call predecessors, (75), 41 states have call successors, (75) Word has length 264 [2021-12-17 15:17:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:17:56,677 INFO L225 Difference]: With dead ends: 243 [2021-12-17 15:17:56,677 INFO L226 Difference]: Without dead ends: 239 [2021-12-17 15:17:56,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 471 SyntacticMatches, 87 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5243 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2120, Invalid=36492, Unknown=0, NotChecked=0, Total=38612 [2021-12-17 15:17:56,679 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 115 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 5766 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 6276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 5766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:17:56,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 3037 Invalid, 6276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 5766 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 15:17:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-17 15:17:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 132. [2021-12-17 15:17:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 39 states have return successors, (40), 39 states have call predecessors, (40), 3 states have call successors, (40) [2021-12-17 15:17:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-12-17 15:17:56,683 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 264 [2021-12-17 15:17:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:17:56,683 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-12-17 15:17:56,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 121 states have (on average 1.6859504132231404) internal successors, (204), 83 states have internal predecessors, (204), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (75), 40 states have call predecessors, (75), 41 states have call successors, (75) [2021-12-17 15:17:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-12-17 15:17:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-17 15:17:56,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:17:56,685 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:17:56,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-17 15:17:56,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 15:17:56,895 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:17:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:17:56,896 INFO L85 PathProgramCache]: Analyzing trace with hash -50347526, now seen corresponding path program 18 times [2021-12-17 15:17:56,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:17:56,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995072416] [2021-12-17 15:17:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:17:56,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:17:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:56,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:57,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:58,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:17:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:00,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2021-12-17 15:18:00,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:18:00,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995072416] [2021-12-17 15:18:00,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995072416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:18:00,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878732885] [2021-12-17 15:18:00,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:18:00,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:18:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:18:00,167 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:18:00,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 15:18:01,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 15:18:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:18:01,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 312 conjunts are in the unsatisfiable core [2021-12-17 15:18:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:18:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2021-12-17 15:18:02,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:18:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-17 15:18:21,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878732885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:18:21,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:18:21,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 117] total 126 [2021-12-17 15:18:21,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195364368] [2021-12-17 15:18:21,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:18:21,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-17 15:18:21,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:18:21,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-17 15:18:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=15306, Unknown=0, NotChecked=0, Total=15750 [2021-12-17 15:18:21,554 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 126 states, 124 states have (on average 1.685483870967742) internal successors, (209), 85 states have internal predecessors, (209), 42 states have call successors, (42), 1 states have call predecessors, (42), 39 states have return successors, (77), 41 states have call predecessors, (77), 42 states have call successors, (77) [2021-12-17 15:18:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:18:26,543 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2021-12-17 15:18:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 15:18:26,543 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 124 states have (on average 1.685483870967742) internal successors, (209), 85 states have internal predecessors, (209), 42 states have call successors, (42), 1 states have call predecessors, (42), 39 states have return successors, (77), 41 states have call predecessors, (77), 42 states have call successors, (77) Word has length 271 [2021-12-17 15:18:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:18:26,544 INFO L225 Difference]: With dead ends: 249 [2021-12-17 15:18:26,544 INFO L226 Difference]: Without dead ends: 245 [2021-12-17 15:18:26,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 487 SyntacticMatches, 86 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5393 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2255, Invalid=38751, Unknown=0, NotChecked=0, Total=41006 [2021-12-17 15:18:26,547 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 99 mSDsluCounter, 3429 mSDsCounter, 0 mSdLazyCounter, 6351 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 6429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 6351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:18:26,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 3479 Invalid, 6429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 6351 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 15:18:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-17 15:18:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 135. [2021-12-17 15:18:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 2 states have call predecessors, (3), 40 states have return successors, (41), 40 states have call predecessors, (41), 3 states have call successors, (41) [2021-12-17 15:18:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-12-17 15:18:26,551 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 271 [2021-12-17 15:18:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:18:26,551 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-12-17 15:18:26,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 124 states have (on average 1.685483870967742) internal successors, (209), 85 states have internal predecessors, (209), 42 states have call successors, (42), 1 states have call predecessors, (42), 39 states have return successors, (77), 41 states have call predecessors, (77), 42 states have call successors, (77) [2021-12-17 15:18:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-12-17 15:18:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-17 15:18:26,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:18:26,553 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:18:26,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 15:18:26,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:18:26,771 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:18:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:18:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash -197771476, now seen corresponding path program 19 times [2021-12-17 15:18:26,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:18:26,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024425385] [2021-12-17 15:18:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:18:26,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:18:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:26,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:26,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:27,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:28,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:29,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2021-12-17 15:18:30,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:18:30,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024425385] [2021-12-17 15:18:30,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024425385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:18:30,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552573329] [2021-12-17 15:18:30,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:18:30,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:18:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:18:30,135 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:18:30,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 15:18:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:31,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 320 conjunts are in the unsatisfiable core [2021-12-17 15:18:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:18:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2021-12-17 15:18:33,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:18:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 2128 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-12-17 15:18:52,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552573329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:18:52,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:18:52,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 120] total 129 [2021-12-17 15:18:52,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802497644] [2021-12-17 15:18:52,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:18:52,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-17 15:18:52,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:18:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-17 15:18:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=16056, Unknown=0, NotChecked=0, Total=16512 [2021-12-17 15:18:52,348 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 129 states, 127 states have (on average 1.68503937007874) internal successors, (214), 87 states have internal predecessors, (214), 43 states have call successors, (43), 1 states have call predecessors, (43), 40 states have return successors, (79), 42 states have call predecessors, (79), 43 states have call successors, (79) [2021-12-17 15:18:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:18:57,506 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2021-12-17 15:18:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-17 15:18:57,507 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 127 states have (on average 1.68503937007874) internal successors, (214), 87 states have internal predecessors, (214), 43 states have call successors, (43), 1 states have call predecessors, (43), 40 states have return successors, (79), 42 states have call predecessors, (79), 43 states have call successors, (79) Word has length 278 [2021-12-17 15:18:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:18:57,508 INFO L225 Difference]: With dead ends: 255 [2021-12-17 15:18:57,508 INFO L226 Difference]: Without dead ends: 251 [2021-12-17 15:18:57,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 498 SyntacticMatches, 90 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5771 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2311, Invalid=40331, Unknown=0, NotChecked=0, Total=42642 [2021-12-17 15:18:57,511 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 6478 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 3664 SdHoareTripleChecker+Invalid, 6804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 6478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:18:57,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 3664 Invalid, 6804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 6478 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 15:18:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-17 15:18:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 138. [2021-12-17 15:18:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 41 states have return successors, (42), 41 states have call predecessors, (42), 3 states have call successors, (42) [2021-12-17 15:18:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2021-12-17 15:18:57,514 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 278 [2021-12-17 15:18:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:18:57,514 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2021-12-17 15:18:57,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 127 states have (on average 1.68503937007874) internal successors, (214), 87 states have internal predecessors, (214), 43 states have call successors, (43), 1 states have call predecessors, (43), 40 states have return successors, (79), 42 states have call predecessors, (79), 43 states have call successors, (79) [2021-12-17 15:18:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2021-12-17 15:18:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-17 15:18:57,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:18:57,516 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:18:57,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 15:18:57,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:18:57,731 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:18:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:18:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash -254589164, now seen corresponding path program 19 times [2021-12-17 15:18:57,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:18:57,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897750341] [2021-12-17 15:18:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:18:57,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:18:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:57,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:57,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:58,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:18:59,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:18:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:00,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:01,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2021-12-17 15:19:01,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:19:01,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897750341] [2021-12-17 15:19:01,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897750341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:19:01,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117899726] [2021-12-17 15:19:01,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:19:01,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:19:01,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:19:01,127 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:19:01,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 15:19:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:02,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 328 conjunts are in the unsatisfiable core [2021-12-17 15:19:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:19:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2021-12-17 15:19:04,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:19:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 2242 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-17 15:19:23,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117899726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:19:23,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:19:24,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 86, 123] total 131 [2021-12-17 15:19:24,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473854745] [2021-12-17 15:19:24,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:19:24,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-17 15:19:24,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:19:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-17 15:19:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=16568, Unknown=0, NotChecked=0, Total=17030 [2021-12-17 15:19:24,002 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 131 states, 130 states have (on average 1.676923076923077) internal successors, (218), 88 states have internal predecessors, (218), 43 states have call successors, (43), 1 states have call predecessors, (43), 41 states have return successors, (81), 43 states have call predecessors, (81), 43 states have call successors, (81) [2021-12-17 15:19:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:19:29,457 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2021-12-17 15:19:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-17 15:19:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 1.676923076923077) internal successors, (218), 88 states have internal predecessors, (218), 43 states have call successors, (43), 1 states have call predecessors, (43), 41 states have return successors, (81), 43 states have call predecessors, (81), 43 states have call successors, (81) Word has length 285 [2021-12-17 15:19:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:19:29,467 INFO L225 Difference]: With dead ends: 261 [2021-12-17 15:19:29,467 INFO L226 Difference]: Without dead ends: 257 [2021-12-17 15:19:29,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 515 SyntacticMatches, 89 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5534 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2447, Invalid=42285, Unknown=0, NotChecked=0, Total=44732 [2021-12-17 15:19:29,476 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 3556 mSDsCounter, 0 mSdLazyCounter, 7086 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 7130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:19:29,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3608 Invalid, 7130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7086 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 15:19:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-17 15:19:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 141. [2021-12-17 15:19:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 42 states have return successors, (43), 42 states have call predecessors, (43), 3 states have call successors, (43) [2021-12-17 15:19:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-12-17 15:19:29,481 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 285 [2021-12-17 15:19:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:19:29,482 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-12-17 15:19:29,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 1.676923076923077) internal successors, (218), 88 states have internal predecessors, (218), 43 states have call successors, (43), 1 states have call predecessors, (43), 41 states have return successors, (81), 43 states have call predecessors, (81), 43 states have call successors, (81) [2021-12-17 15:19:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-12-17 15:19:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-17 15:19:29,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:19:29,483 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:19:29,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-17 15:19:29,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-17 15:19:29,695 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:19:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:19:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1477247830, now seen corresponding path program 20 times [2021-12-17 15:19:29,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:19:29,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754777002] [2021-12-17 15:19:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:19:29,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:19:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:29,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:29,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:31,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:32,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:33,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:33,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:33,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:19:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:19:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2021-12-17 15:19:33,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:19:33,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754777002] [2021-12-17 15:19:33,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754777002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:19:33,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749501217] [2021-12-17 15:19:33,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:19:33,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:19:33,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:19:33,415 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:19:33,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-17 15:19:35,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:19:35,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:19:35,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 336 conjunts are in the unsatisfiable core [2021-12-17 15:19:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:19:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2021-12-17 15:19:36,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:19:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 2360 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-17 15:19:57,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749501217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:19:57,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:19:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 126] total 135 [2021-12-17 15:19:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845243167] [2021-12-17 15:19:57,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:19:57,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-12-17 15:19:57,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:19:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-12-17 15:19:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=17612, Unknown=0, NotChecked=0, Total=18090 [2021-12-17 15:19:57,941 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 135 states, 133 states have (on average 1.6842105263157894) internal successors, (224), 91 states have internal predecessors, (224), 45 states have call successors, (45), 1 states have call predecessors, (45), 42 states have return successors, (83), 44 states have call predecessors, (83), 45 states have call successors, (83) [2021-12-17 15:20:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:20:03,891 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2021-12-17 15:20:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-17 15:20:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 133 states have (on average 1.6842105263157894) internal successors, (224), 91 states have internal predecessors, (224), 45 states have call successors, (45), 1 states have call predecessors, (45), 42 states have return successors, (83), 44 states have call predecessors, (83), 45 states have call successors, (83) Word has length 292 [2021-12-17 15:20:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:20:03,893 INFO L225 Difference]: With dead ends: 267 [2021-12-17 15:20:03,893 INFO L226 Difference]: Without dead ends: 263 [2021-12-17 15:20:03,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 523 SyntacticMatches, 95 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2510, Invalid=44362, Unknown=0, NotChecked=0, Total=46872 [2021-12-17 15:20:03,895 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 89 mSDsluCounter, 4029 mSDsCounter, 0 mSdLazyCounter, 7416 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 8015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 7416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:20:03,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 4082 Invalid, 8015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 7416 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 15:20:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-17 15:20:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 144. [2021-12-17 15:20:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 43 states have return successors, (44), 43 states have call predecessors, (44), 3 states have call successors, (44) [2021-12-17 15:20:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-12-17 15:20:03,906 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 292 [2021-12-17 15:20:03,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:20:03,906 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-12-17 15:20:03,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 133 states have (on average 1.6842105263157894) internal successors, (224), 91 states have internal predecessors, (224), 45 states have call successors, (45), 1 states have call predecessors, (45), 42 states have return successors, (83), 44 states have call predecessors, (83), 45 states have call successors, (83) [2021-12-17 15:20:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-12-17 15:20:03,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-17 15:20:03,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:20:03,908 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:20:03,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-17 15:20:04,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-17 15:20:04,112 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:20:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:20:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1770573486, now seen corresponding path program 20 times [2021-12-17 15:20:04,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:20:04,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935383176] [2021-12-17 15:20:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:20:04,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:20:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:04,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:05,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:06,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-12-17 15:20:07,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:20:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935383176] [2021-12-17 15:20:07,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935383176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:20:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362964638] [2021-12-17 15:20:07,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:20:07,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:20:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:20:07,914 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:20:07,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-17 15:20:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:20:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:20:09,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 344 conjunts are in the unsatisfiable core [2021-12-17 15:20:09,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:20:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-12-17 15:20:11,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:20:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 2480 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-12-17 15:20:33,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362964638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:20:33,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:20:33,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 90, 129] total 137 [2021-12-17 15:20:33,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343401914] [2021-12-17 15:20:33,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:20:33,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-12-17 15:20:33,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:20:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-12-17 15:20:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=18149, Unknown=0, NotChecked=0, Total=18632 [2021-12-17 15:20:33,875 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 137 states, 136 states have (on average 1.6764705882352942) internal successors, (228), 92 states have internal predecessors, (228), 45 states have call successors, (45), 1 states have call predecessors, (45), 43 states have return successors, (85), 45 states have call predecessors, (85), 45 states have call successors, (85) [2021-12-17 15:20:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:20:40,040 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2021-12-17 15:20:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-17 15:20:40,040 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 1.6764705882352942) internal successors, (228), 92 states have internal predecessors, (228), 45 states have call successors, (45), 1 states have call predecessors, (45), 43 states have return successors, (85), 45 states have call predecessors, (85), 45 states have call successors, (85) Word has length 299 [2021-12-17 15:20:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:20:40,041 INFO L225 Difference]: With dead ends: 273 [2021-12-17 15:20:40,041 INFO L226 Difference]: Without dead ends: 269 [2021-12-17 15:20:40,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 539 SyntacticMatches, 95 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5933 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2651, Invalid=46411, Unknown=0, NotChecked=0, Total=49062 [2021-12-17 15:20:40,044 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 76 mSDsluCounter, 3947 mSDsCounter, 0 mSdLazyCounter, 7638 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 4001 SdHoareTripleChecker+Invalid, 7703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 7638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:20:40,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 4001 Invalid, 7703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 7638 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 15:20:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-17 15:20:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 147. [2021-12-17 15:20:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 44 states have return successors, (45), 44 states have call predecessors, (45), 3 states have call successors, (45) [2021-12-17 15:20:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2021-12-17 15:20:40,047 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 299 [2021-12-17 15:20:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:20:40,047 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2021-12-17 15:20:40,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 136 states have (on average 1.6764705882352942) internal successors, (228), 92 states have internal predecessors, (228), 45 states have call successors, (45), 1 states have call predecessors, (45), 43 states have return successors, (85), 45 states have call predecessors, (85), 45 states have call successors, (85) [2021-12-17 15:20:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2021-12-17 15:20:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-17 15:20:40,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:20:40,049 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:20:40,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-17 15:20:40,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-17 15:20:40,271 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:20:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:20:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash 788333056, now seen corresponding path program 21 times [2021-12-17 15:20:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:20:40,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533638218] [2021-12-17 15:20:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:20:40,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:20:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:40,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:42,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:44,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:20:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:20:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2021-12-17 15:20:44,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:20:44,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533638218] [2021-12-17 15:20:44,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533638218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:20:44,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936354225] [2021-12-17 15:20:44,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:20:44,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:20:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:20:44,371 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:20:44,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-17 15:20:46,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 15:20:46,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:20:46,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 352 conjunts are in the unsatisfiable core [2021-12-17 15:20:46,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:20:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2021-12-17 15:20:47,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:21:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 2604 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-17 15:21:11,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936354225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:21:11,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:21:11,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 132] total 141 [2021-12-17 15:21:11,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810146948] [2021-12-17 15:21:11,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:21:11,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-12-17 15:21:11,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:21:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-12-17 15:21:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=19240, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 15:21:11,274 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 141 states, 139 states have (on average 1.683453237410072) internal successors, (234), 95 states have internal predecessors, (234), 47 states have call successors, (47), 1 states have call predecessors, (47), 44 states have return successors, (87), 46 states have call predecessors, (87), 47 states have call successors, (87) [2021-12-17 15:21:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:21:17,615 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2021-12-17 15:21:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-17 15:21:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 139 states have (on average 1.683453237410072) internal successors, (234), 95 states have internal predecessors, (234), 47 states have call successors, (47), 1 states have call predecessors, (47), 44 states have return successors, (87), 46 states have call predecessors, (87), 47 states have call successors, (87) Word has length 306 [2021-12-17 15:21:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:21:17,616 INFO L225 Difference]: With dead ends: 279 [2021-12-17 15:21:17,616 INFO L226 Difference]: Without dead ends: 275 [2021-12-17 15:21:17,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 551 SyntacticMatches, 97 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6826 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2717, Invalid=48585, Unknown=0, NotChecked=0, Total=51302 [2021-12-17 15:21:17,620 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 156 mSDsluCounter, 4344 mSDsCounter, 0 mSdLazyCounter, 7721 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 4399 SdHoareTripleChecker+Invalid, 8581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 7721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:21:17,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 4399 Invalid, 8581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 7721 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 15:21:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-17 15:21:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 150. [2021-12-17 15:21:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 45 states have return successors, (46), 45 states have call predecessors, (46), 3 states have call successors, (46) [2021-12-17 15:21:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-12-17 15:21:17,624 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 306 [2021-12-17 15:21:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:21:17,624 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-12-17 15:21:17,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 139 states have (on average 1.683453237410072) internal successors, (234), 95 states have internal predecessors, (234), 47 states have call successors, (47), 1 states have call predecessors, (47), 44 states have return successors, (87), 46 states have call predecessors, (87), 47 states have call successors, (87) [2021-12-17 15:21:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-12-17 15:21:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-17 15:21:17,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:21:17,626 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:21:17,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-17 15:21:17,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-17 15:21:17,839 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:21:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:21:17,840 INFO L85 PathProgramCache]: Analyzing trace with hash -774899512, now seen corresponding path program 21 times [2021-12-17 15:21:17,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:21:17,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890150588] [2021-12-17 15:21:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:21:17,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:21:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:17,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:18,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:20,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:21:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2021-12-17 15:21:21,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:21:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890150588] [2021-12-17 15:21:21,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890150588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:21:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928457395] [2021-12-17 15:21:21,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:21:21,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:21:21,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:21:21,988 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:21:21,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-17 15:21:24,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 15:21:24,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:21:24,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 360 conjunts are in the unsatisfiable core [2021-12-17 15:21:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:21:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2021-12-17 15:21:25,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15