./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum60.i --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/reducercommutativity/rangesum60.i -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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:31:57,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:31:57,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:31:57,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:31:57,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:31:57,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:31:57,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:31:57,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:31:57,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:31:57,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:31:57,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:31:57,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:31:57,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:31:57,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:31:57,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:31:57,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:31:57,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:31:57,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:31:57,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:31:57,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:31:57,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:31:57,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:31:57,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:31:57,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:31:57,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:31:57,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:31:57,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:31:57,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:31:57,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:31:57,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:31:57,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:31:57,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:31:57,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:31:57,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:31:57,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:31:57,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:31:57,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:31:57,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:31:57,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:31:57,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:31:57,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:31:57,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:31:57,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:31:57,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:31:57,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:31:57,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:31:57,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:31:57,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:31:57,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:31:57,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:31:57,713 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:31:57,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:31:57,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:31:57,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:31:57,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:31:57,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:31:57,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:31:57,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:31:57,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:31:57,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:31:57,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:31:57,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:31:57,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:31:57,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:31:57,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:31:57,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:31:57,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:31:57,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:31:57,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:31:57,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:31:57,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:31:57,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:31:57,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:31:57,721 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:31:57,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:31:57,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:31:57,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2021-12-16 22:31:57,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:31:57,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:31:57,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:31:57,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:31:57,958 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:31:57,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-12-16 22:31:58,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44747729c/74beba8e09c3492aa70ac423caab39f2/FLAG7929f8b02 [2021-12-16 22:31:58,398 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:31:58,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-12-16 22:31:58,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44747729c/74beba8e09c3492aa70ac423caab39f2/FLAG7929f8b02 [2021-12-16 22:31:58,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44747729c/74beba8e09c3492aa70ac423caab39f2 [2021-12-16 22:31:58,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:31:58,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:31:58,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:31:58,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:31:58,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:31:58,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21da0376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58, skipping insertion in model container [2021-12-16 22:31:58,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:31:58,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:31:58,665 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/reducercommutativity/rangesum60.i[1465,1478] [2021-12-16 22:31:58,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:31:58,678 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:31:58,718 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/reducercommutativity/rangesum60.i[1465,1478] [2021-12-16 22:31:58,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:31:58,728 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:31:58,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58 WrapperNode [2021-12-16 22:31:58,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:31:58,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:31:58,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:31:58,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:31:58,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,761 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-12-16 22:31:58,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:31:58,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:31:58,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:31:58,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:31:58,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:31:58,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:31:58,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:31:58,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:31:58,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (1/1) ... [2021-12-16 22:31:58,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:31:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:31:58,821 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) [2021-12-16 22:31:58,830 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 [2021-12-16 22:31:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:31:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:31:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:31:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:31:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:31:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:31:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:31:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2021-12-16 22:31:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2021-12-16 22:31:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:31:58,905 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:31:58,907 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:31:59,015 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:31:59,035 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:31:59,035 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 22:31:59,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:31:59 BoogieIcfgContainer [2021-12-16 22:31:59,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:31:59,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:31:59,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:31:59,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:31:59,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:31:58" (1/3) ... [2021-12-16 22:31:59,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11391995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:31:59, skipping insertion in model container [2021-12-16 22:31:59,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:31:58" (2/3) ... [2021-12-16 22:31:59,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11391995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:31:59, skipping insertion in model container [2021-12-16 22:31:59,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:31:59" (3/3) ... [2021-12-16 22:31:59,060 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2021-12-16 22:31:59,066 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:31:59,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:31:59,127 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:31:59,150 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 [2021-12-16 22:31:59,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:31:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:31:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 22:31:59,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:31:59,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:31:59,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:31:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:31:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash -275565944, now seen corresponding path program 1 times [2021-12-16 22:31:59,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:31:59,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211735235] [2021-12-16 22:31:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:31:59,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:31:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:31:59,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 22:31:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:31:59,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 22:31:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:31:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 22:31:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:31:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:31:59,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:31:59,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211735235] [2021-12-16 22:31:59,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211735235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:31:59,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:31:59,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:31:59,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227217497] [2021-12-16 22:31:59,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:31:59,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:31:59,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:31:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:31:59,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:31:59,435 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:31:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:31:59,476 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-12-16 22:31:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:31:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-12-16 22:31:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:31:59,483 INFO L225 Difference]: With dead ends: 54 [2021-12-16 22:31:59,483 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 22:31:59,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:31:59,489 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:31:59,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:31:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 22:31:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-16 22:31:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:31:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-16 22:31:59,534 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 29 [2021-12-16 22:31:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:31:59,535 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-16 22:31:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:31:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-16 22:31:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 22:31:59,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:31:59,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:31:59,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:31:59,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:31:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:31:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash -653100523, now seen corresponding path program 1 times [2021-12-16 22:31:59,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:31:59,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988251190] [2021-12-16 22:31:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:31:59,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:31:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:31:59,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 22:31:59,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:31:59,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988251190] [2021-12-16 22:31:59,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-12-16 22:31:59,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64938843] [2021-12-16 22:31:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:31:59,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:31:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:31:59,639 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) [2021-12-16 22:31:59,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:31:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:31:59,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:31:59,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:31:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:31:59,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:31:59,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64938843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:31:59,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:31:59,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:31:59,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405719019] [2021-12-16 22:31:59,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:31:59,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:31:59,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:31:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:31:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:31:59,862 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:31:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:31:59,881 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-12-16 22:31:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:31:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-16 22:31:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:31:59,884 INFO L225 Difference]: With dead ends: 46 [2021-12-16 22:31:59,884 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 22:31:59,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:31:59,890 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:31:59,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:31:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 22:31:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-16 22:31:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:31:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-16 22:31:59,901 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2021-12-16 22:31:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:31:59,902 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-16 22:31:59,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:31:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-16 22:31:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 22:31:59,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:31:59,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:31:59,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:00,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:00,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1081404920, now seen corresponding path program 1 times [2021-12-16 22:32:00,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:00,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633006761] [2021-12-16 22:32:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:00,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:00,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 22:32:00,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:00,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633006761] [2021-12-16 22:32:00,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-12-16 22:32:00,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723422356] [2021-12-16 22:32:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:00,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:00,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:00,176 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) [2021-12-16 22:32:00,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:32:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:32:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 22:32:00,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:32:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723422356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:00,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:32:00,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:32:00,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251593316] [2021-12-16 22:32:00,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:00,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:32:00,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:32:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:00,360 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:00,377 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-12-16 22:32:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:32:00,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2021-12-16 22:32:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:00,380 INFO L225 Difference]: With dead ends: 44 [2021-12-16 22:32:00,380 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 22:32:00,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:00,384 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:00,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 22:32:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-16 22:32:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-16 22:32:00,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 40 [2021-12-16 22:32:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:00,401 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-16 22:32:00,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-16 22:32:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 22:32:00,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:00,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:00,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 22:32:00,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 22:32:00,629 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash -673301430, now seen corresponding path program 1 times [2021-12-16 22:32:00,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:00,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430155335] [2021-12-16 22:32:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:00,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 22:32:00,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430155335] [2021-12-16 22:32:00,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-12-16 22:32:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226627684] [2021-12-16 22:32:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:00,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:00,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:00,674 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) [2021-12-16 22:32:00,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:32:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:32:00,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:32:00,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:32:00,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226627684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:00,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:32:00,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:32:00,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450058788] [2021-12-16 22:32:00,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:00,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:32:00,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:32:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:00,807 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:00,817 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-12-16 22:32:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:32:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-12-16 22:32:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:00,819 INFO L225 Difference]: With dead ends: 55 [2021-12-16 22:32:00,819 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 22:32:00,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:00,821 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:00,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 22:32:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-16 22:32:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-16 22:32:00,827 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 42 [2021-12-16 22:32:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:00,827 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-16 22:32:00,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-16 22:32:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 22:32:00,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:00,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:00,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:01,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:01,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1042180377, now seen corresponding path program 1 times [2021-12-16 22:32:01,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:01,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211876163] [2021-12-16 22:32:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:01,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 22:32:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 22:32:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:01,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:01,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211876163] [2021-12-16 22:32:01,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211876163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:01,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604883782] [2021-12-16 22:32:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:01,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:01,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:01,116 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) [2021-12-16 22:32:01,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:32:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:32:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:01,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:01,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604883782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:01,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:01,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-16 22:32:01,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046134514] [2021-12-16 22:32:01,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:01,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:32:01,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:32:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:32:01,382 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:01,442 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2021-12-16 22:32:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:32:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-12-16 22:32:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:01,444 INFO L225 Difference]: With dead ends: 69 [2021-12-16 22:32:01,444 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 22:32:01,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:32:01,445 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:01,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 22:32:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-16 22:32:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-16 22:32:01,451 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2021-12-16 22:32:01,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:01,451 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-16 22:32:01,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-16 22:32:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 22:32:01,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:01,452 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:01,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:01,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:01,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash -604386836, now seen corresponding path program 2 times [2021-12-16 22:32:01,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:01,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462646232] [2021-12-16 22:32:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:01,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 22:32:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:32:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 22:32:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-16 22:32:01,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:01,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462646232] [2021-12-16 22:32:01,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462646232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:01,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634985335] [2021-12-16 22:32:01,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:32:01,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:01,720 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) [2021-12-16 22:32:01,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:32:01,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:32:01,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:01,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:32:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 22:32:01,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 22:32:02,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634985335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:02,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:02,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-16 22:32:02,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044442811] [2021-12-16 22:32:02,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:02,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:32:02,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:32:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:32:02,072 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 22:32:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:02,138 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-12-16 22:32:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:32:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2021-12-16 22:32:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:02,141 INFO L225 Difference]: With dead ends: 86 [2021-12-16 22:32:02,141 INFO L226 Difference]: Without dead ends: 56 [2021-12-16 22:32:02,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:32:02,143 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:02,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 112 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-16 22:32:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-12-16 22:32:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-16 22:32:02,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 57 [2021-12-16 22:32:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:02,148 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-16 22:32:02,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 22:32:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-16 22:32:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-16 22:32:02,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:02,149 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:02,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:02,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:02,372 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 948362870, now seen corresponding path program 1 times [2021-12-16 22:32:02,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244800116] [2021-12-16 22:32:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:02,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:02,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:32:02,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539842824] [2021-12-16 22:32:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:02,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:02,399 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) [2021-12-16 22:32:02,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:32:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 22:32:02,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-16 22:32:02,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-16 22:32:02,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:02,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244800116] [2021-12-16 22:32:02,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:32:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539842824] [2021-12-16 22:32:02,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539842824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:02,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:32:02,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-16 22:32:02,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387647076] [2021-12-16 22:32:02,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:02,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:32:02,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:32:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:32:02,916 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:02,995 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-12-16 22:32:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:32:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2021-12-16 22:32:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:02,997 INFO L225 Difference]: With dead ends: 103 [2021-12-16 22:32:02,997 INFO L226 Difference]: Without dead ends: 75 [2021-12-16 22:32:02,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:32:02,998 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:02,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 236 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-16 22:32:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-16 22:32:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-12-16 22:32:03,006 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 78 [2021-12-16 22:32:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:03,006 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-12-16 22:32:03,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-12-16 22:32:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-16 22:32:03,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:03,008 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:03,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:03,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:03,220 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 468172686, now seen corresponding path program 2 times [2021-12-16 22:32:03,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580405574] [2021-12-16 22:32:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:03,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:03,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:32:03,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912011514] [2021-12-16 22:32:03,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:32:03,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:03,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:03,267 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) [2021-12-16 22:32:03,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:32:03,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:32:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:32:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-16 22:32:03,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-16 22:32:04,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:04,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580405574] [2021-12-16 22:32:04,617 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:32:04,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912011514] [2021-12-16 22:32:04,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912011514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:04,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:32:04,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-12-16 22:32:04,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368709811] [2021-12-16 22:32:04,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:04,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 22:32:04,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 22:32:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:32:04,621 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:04,747 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2021-12-16 22:32:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-16 22:32:04,748 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 102 [2021-12-16 22:32:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:04,749 INFO L225 Difference]: With dead ends: 151 [2021-12-16 22:32:04,749 INFO L226 Difference]: Without dead ends: 123 [2021-12-16 22:32:04,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:32:04,751 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:04,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 106 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-16 22:32:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-12-16 22:32:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2021-12-16 22:32:04,761 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 102 [2021-12-16 22:32:04,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:04,761 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2021-12-16 22:32:04,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2021-12-16 22:32:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-16 22:32:04,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:04,764 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:04,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:04,992 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1075718590, now seen corresponding path program 3 times [2021-12-16 22:32:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124472938] [2021-12-16 22:32:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:04,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:05,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:32:05,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883654680] [2021-12-16 22:32:05,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:32:05,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:05,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:05,036 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) [2021-12-16 22:32:05,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:32:05,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:32:05,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:32:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 2190 trivial. 0 not checked. [2021-12-16 22:32:05,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2021-12-16 22:32:05,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:05,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124472938] [2021-12-16 22:32:05,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:32:05,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883654680] [2021-12-16 22:32:05,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883654680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:05,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:32:05,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 22:32:05,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494114551] [2021-12-16 22:32:05,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:05,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 22:32:05,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:05,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 22:32:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-16 22:32:05,496 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:32:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:05,516 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2021-12-16 22:32:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 22:32:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2021-12-16 22:32:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:05,518 INFO L225 Difference]: With dead ends: 149 [2021-12-16 22:32:05,518 INFO L226 Difference]: Without dead ends: 129 [2021-12-16 22:32:05,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-16 22:32:05,519 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:05,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-16 22:32:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-16 22:32:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2021-12-16 22:32:05,528 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 150 [2021-12-16 22:32:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:05,529 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2021-12-16 22:32:05,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:32:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2021-12-16 22:32:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 22:32:05,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:05,531 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:05,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:05,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 22:32:05,745 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash -379068284, now seen corresponding path program 4 times [2021-12-16 22:32:05,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:05,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862267075] [2021-12-16 22:32:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:05,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:05,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:32:05,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002610096] [2021-12-16 22:32:05,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:32:05,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:05,794 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) [2021-12-16 22:32:05,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:32:05,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:32:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 22:32:05,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-16 22:32:07,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-16 22:32:07,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862267075] [2021-12-16 22:32:07,817 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:32:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002610096] [2021-12-16 22:32:07,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002610096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:07,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:32:07,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2021-12-16 22:32:07,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992357652] [2021-12-16 22:32:07,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:07,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-16 22:32:07,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-16 22:32:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 22:32:07,822 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:07,955 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2021-12-16 22:32:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 22:32:07,956 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 156 [2021-12-16 22:32:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:07,957 INFO L225 Difference]: With dead ends: 191 [2021-12-16 22:32:07,957 INFO L226 Difference]: Without dead ends: 157 [2021-12-16 22:32:07,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 22:32:07,960 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:07,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 210 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-16 22:32:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-16 22:32:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 163 transitions. [2021-12-16 22:32:07,968 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 163 transitions. Word has length 156 [2021-12-16 22:32:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:07,968 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 163 transitions. [2021-12-16 22:32:07,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 163 transitions. [2021-12-16 22:32:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-16 22:32:07,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:07,971 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:08,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:08,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:32:08,202 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1942589664, now seen corresponding path program 5 times [2021-12-16 22:32:08,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:08,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817147100] [2021-12-16 22:32:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:08,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:08,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:32:08,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252148799] [2021-12-16 22:32:08,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:32:08,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:08,274 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) [2021-12-16 22:32:08,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:34:59,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2021-12-16 22:34:59,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:34:59,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:34:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 3686 trivial. 0 not checked. [2021-12-16 22:35:00,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 3716 trivial. 0 not checked. [2021-12-16 22:35:00,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:00,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817147100] [2021-12-16 22:35:00,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:00,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252148799] [2021-12-16 22:35:00,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252148799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:00,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:00,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 22:35:00,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650732532] [2021-12-16 22:35:00,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:00,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 22:35:00,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 22:35:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 22:35:00,325 INFO L87 Difference]: Start difference. First operand 157 states and 163 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:00,359 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2021-12-16 22:35:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:35:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 184 [2021-12-16 22:35:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:00,364 INFO L225 Difference]: With dead ends: 201 [2021-12-16 22:35:00,364 INFO L226 Difference]: Without dead ends: 169 [2021-12-16 22:35:00,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 22:35:00,365 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:00,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:35:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-16 22:35:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-16 22:35:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0548780487804879) internal successors, (173), 164 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2021-12-16 22:35:00,383 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 184 [2021-12-16 22:35:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:00,384 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2021-12-16 22:35:00,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2021-12-16 22:35:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-16 22:35:00,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:00,387 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 21, 21, 15, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:00,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:00,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:35:00,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash 853335264, now seen corresponding path program 6 times [2021-12-16 22:35:00,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:00,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576085989] [2021-12-16 22:35:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:00,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:00,649 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530460879] [2021-12-16 22:35:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:35:00,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:00,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:00,651 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) [2021-12-16 22:35:00,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:35:01,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-16 22:35:01,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:35:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 3976 trivial. 0 not checked. [2021-12-16 22:35:01,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4308 trivial. 0 not checked. [2021-12-16 22:35:01,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576085989] [2021-12-16 22:35:01,595 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530460879] [2021-12-16 22:35:01,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530460879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:01,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:01,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-16 22:35:01,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175465684] [2021-12-16 22:35:01,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:01,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 22:35:01,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 22:35:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:35:01,597 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:01,634 INFO L93 Difference]: Finished difference Result 213 states and 235 transitions. [2021-12-16 22:35:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:35:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 220 [2021-12-16 22:35:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:01,635 INFO L225 Difference]: With dead ends: 213 [2021-12-16 22:35:01,635 INFO L226 Difference]: Without dead ends: 181 [2021-12-16 22:35:01,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:35:01,636 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:01,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:35:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-16 22:35:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-12-16 22:35:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0511363636363635) internal successors, (185), 176 states have internal predecessors, (185), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2021-12-16 22:35:01,643 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 220 [2021-12-16 22:35:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:01,644 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2021-12-16 22:35:01,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2021-12-16 22:35:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-16 22:35:01,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:01,646 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 21, 21, 15, 10, 10, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:01,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:01,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:35:01,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -840128276, now seen corresponding path program 7 times [2021-12-16 22:35:01,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:01,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589259727] [2021-12-16 22:35:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:01,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:01,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:01,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198012292] [2021-12-16 22:35:01,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:35:01,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:01,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:01,922 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) [2021-12-16 22:35:01,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:35:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:35:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:35:02,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 157 proven. 7 refuted. 0 times theorem prover too weak. 4244 trivial. 0 not checked. [2021-12-16 22:35:02,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 37 proven. 337 refuted. 0 times theorem prover too weak. 4034 trivial. 0 not checked. [2021-12-16 22:35:02,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:02,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589259727] [2021-12-16 22:35:02,811 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:02,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198012292] [2021-12-16 22:35:02,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198012292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:02,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:02,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 22:35:02,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720422856] [2021-12-16 22:35:02,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:02,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 22:35:02,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 22:35:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 22:35:02,814 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:02,838 INFO L93 Difference]: Finished difference Result 249 states and 274 transitions. [2021-12-16 22:35:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:35:02,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 232 [2021-12-16 22:35:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:02,840 INFO L225 Difference]: With dead ends: 249 [2021-12-16 22:35:02,840 INFO L226 Difference]: Without dead ends: 193 [2021-12-16 22:35:02,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 22:35:02,842 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:02,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:35:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-16 22:35:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-12-16 22:35:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.047872340425532) internal successors, (197), 188 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2021-12-16 22:35:02,849 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 232 [2021-12-16 22:35:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:02,849 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2021-12-16 22:35:02,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2021-12-16 22:35:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-16 22:35:02,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:02,853 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 33, 33, 18, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:02,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:03,071 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,SelfDestructingSolverStorable12 [2021-12-16 22:35:03,071 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1764241452, now seen corresponding path program 8 times [2021-12-16 22:35:03,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:03,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337840500] [2021-12-16 22:35:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:03,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:03,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:03,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405851345] [2021-12-16 22:35:03,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:35:03,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:03,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:03,113 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) [2021-12-16 22:35:03,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:35:03,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:35:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:35:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 549 proven. 57 refuted. 0 times theorem prover too weak. 4792 trivial. 0 not checked. [2021-12-16 22:35:03,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 93 proven. 835 refuted. 0 times theorem prover too weak. 4470 trivial. 0 not checked. [2021-12-16 22:35:04,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:04,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337840500] [2021-12-16 22:35:04,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:04,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405851345] [2021-12-16 22:35:04,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405851345] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:04,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:04,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-16 22:35:04,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459893227] [2021-12-16 22:35:04,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:04,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 22:35:04,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:04,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 22:35:04,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-12-16 22:35:04,085 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:04,148 INFO L93 Difference]: Finished difference Result 285 states and 314 transitions. [2021-12-16 22:35:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 22:35:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 268 [2021-12-16 22:35:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:04,151 INFO L225 Difference]: With dead ends: 285 [2021-12-16 22:35:04,151 INFO L226 Difference]: Without dead ends: 217 [2021-12-16 22:35:04,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-12-16 22:35:04,152 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:04,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 147 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:35:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-16 22:35:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-12-16 22:35:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 212 states have internal predecessors, (221), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2021-12-16 22:35:04,158 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 268 [2021-12-16 22:35:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:04,159 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2021-12-16 22:35:04,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2021-12-16 22:35:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-16 22:35:04,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:04,161 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 57, 57, 42, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:04,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 22:35:04,376 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,SelfDestructingSolverStorable13 [2021-12-16 22:35:04,376 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1339400532, now seen corresponding path program 9 times [2021-12-16 22:35:04,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:04,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367076717] [2021-12-16 22:35:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:04,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:04,426 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:04,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848547383] [2021-12-16 22:35:04,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:35:04,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:04,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:04,428 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) [2021-12-16 22:35:04,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:35:04,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-16 22:35:04,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:04,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:35:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2021-12-16 22:35:05,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2021-12-16 22:35:05,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367076717] [2021-12-16 22:35:05,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848547383] [2021-12-16 22:35:05,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848547383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:05,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:05,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-16 22:35:05,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093865320] [2021-12-16 22:35:05,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:05,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 22:35:05,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 22:35:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-12-16 22:35:05,649 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:35:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:05,713 INFO L93 Difference]: Finished difference Result 333 states and 370 transitions. [2021-12-16 22:35:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 22:35:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 340 [2021-12-16 22:35:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:05,715 INFO L225 Difference]: With dead ends: 333 [2021-12-16 22:35:05,715 INFO L226 Difference]: Without dead ends: 241 [2021-12-16 22:35:05,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-12-16 22:35:05,716 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:05,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 74 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:35:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-16 22:35:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-12-16 22:35:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0720338983050848) internal successors, (253), 236 states have internal predecessors, (253), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 259 transitions. [2021-12-16 22:35:05,724 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 259 transitions. Word has length 340 [2021-12-16 22:35:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:05,724 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 259 transitions. [2021-12-16 22:35:05,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:35:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 259 transitions. [2021-12-16 22:35:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-12-16 22:35:05,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:05,727 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 60, 60, 42, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:05,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:05,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:05,954 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1389660628, now seen corresponding path program 10 times [2021-12-16 22:35:05,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:05,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656301183] [2021-12-16 22:35:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:05,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:06,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906588642] [2021-12-16 22:35:06,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:35:06,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:06,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:06,006 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) [2021-12-16 22:35:06,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 22:35:06,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:35:06,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:06,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 22:35:06,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 6252 proven. 301 refuted. 0 times theorem prover too weak. 7125 trivial. 0 not checked. [2021-12-16 22:35:06,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 2802 proven. 2546 refuted. 0 times theorem prover too weak. 8330 trivial. 0 not checked. [2021-12-16 22:35:07,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:07,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656301183] [2021-12-16 22:35:07,544 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:07,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906588642] [2021-12-16 22:35:07,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906588642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:07,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:07,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-12-16 22:35:07,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640812935] [2021-12-16 22:35:07,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:07,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 22:35:07,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 22:35:07,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:35:07,547 INFO L87 Difference]: Start difference. First operand 241 states and 259 transitions. Second operand has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:07,643 INFO L93 Difference]: Finished difference Result 405 states and 458 transitions. [2021-12-16 22:35:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 22:35:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 412 [2021-12-16 22:35:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:07,645 INFO L225 Difference]: With dead ends: 405 [2021-12-16 22:35:07,646 INFO L226 Difference]: Without dead ends: 289 [2021-12-16 22:35:07,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:35:07,647 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:07,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 75 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:35:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-16 22:35:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-12-16 22:35:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0598591549295775) internal successors, (301), 284 states have internal predecessors, (301), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 307 transitions. [2021-12-16 22:35:07,655 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 307 transitions. Word has length 412 [2021-12-16 22:35:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:07,656 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 307 transitions. [2021-12-16 22:35:07,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 307 transitions. [2021-12-16 22:35:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2021-12-16 22:35:07,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:07,660 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 90, 60, 60, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:07,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:07,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 22:35:07,873 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1144607532, now seen corresponding path program 11 times [2021-12-16 22:35:07,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:07,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796355693] [2021-12-16 22:35:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:07,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:07,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966835409] [2021-12-16 22:35:07,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:35:07,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:07,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:07,921 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) [2021-12-16 22:35:07,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 22:35:08,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-16 22:35:08,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 22:35:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 12531 proven. 301 refuted. 0 times theorem prover too weak. 16038 trivial. 0 not checked. [2021-12-16 22:35:08,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 1261 proven. 4121 refuted. 0 times theorem prover too weak. 23488 trivial. 0 not checked. [2021-12-16 22:35:09,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796355693] [2021-12-16 22:35:09,731 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966835409] [2021-12-16 22:35:09,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966835409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:09,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:09,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-12-16 22:35:09,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356279139] [2021-12-16 22:35:09,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 22:35:09,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 22:35:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:35:09,734 INFO L87 Difference]: Start difference. First operand 289 states and 307 transitions. Second operand has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:09,892 INFO L93 Difference]: Finished difference Result 501 states and 570 transitions. [2021-12-16 22:35:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 22:35:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 556 [2021-12-16 22:35:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:09,898 INFO L225 Difference]: With dead ends: 501 [2021-12-16 22:35:09,898 INFO L226 Difference]: Without dead ends: 337 [2021-12-16 22:35:09,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1079 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:35:09,899 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 74 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:09,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 170 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:35:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-16 22:35:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2021-12-16 22:35:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0993975903614457) internal successors, (365), 332 states have internal predecessors, (365), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 371 transitions. [2021-12-16 22:35:09,916 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 371 transitions. Word has length 556 [2021-12-16 22:35:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:09,916 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 371 transitions. [2021-12-16 22:35:09,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 371 transitions. [2021-12-16 22:35:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-12-16 22:35:09,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:09,922 INFO L514 BasicCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:09,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:10,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 22:35:10,135 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash 832504364, now seen corresponding path program 12 times [2021-12-16 22:35:10,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:10,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575922873] [2021-12-16 22:35:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:10,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:10,188 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:10,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664285550] [2021-12-16 22:35:10,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:35:10,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:10,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:10,190 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) [2021-12-16 22:35:10,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 22:35:11,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-12-16 22:35:11,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 22:35:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 21132 proven. 100 refuted. 0 times theorem prover too weak. 29742 trivial. 0 not checked. [2021-12-16 22:35:12,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 50874 trivial. 0 not checked. [2021-12-16 22:35:12,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:12,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575922873] [2021-12-16 22:35:12,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:12,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664285550] [2021-12-16 22:35:12,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664285550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:12,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:12,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-16 22:35:12,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937269024] [2021-12-16 22:35:12,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:12,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:35:12,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:35:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:35:12,953 INFO L87 Difference]: Start difference. First operand 337 states and 371 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:13,019 INFO L93 Difference]: Finished difference Result 549 states and 625 transitions. [2021-12-16 22:35:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:35:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 700 [2021-12-16 22:35:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:13,021 INFO L225 Difference]: With dead ends: 549 [2021-12-16 22:35:13,021 INFO L226 Difference]: Without dead ends: 361 [2021-12-16 22:35:13,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:35:13,023 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:13,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 128 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:35:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-16 22:35:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2021-12-16 22:35:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 356 states have (on average 1.0926966292134832) internal successors, (389), 356 states have internal predecessors, (389), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 395 transitions. [2021-12-16 22:35:13,033 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 395 transitions. Word has length 700 [2021-12-16 22:35:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:13,033 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 395 transitions. [2021-12-16 22:35:13,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 395 transitions. [2021-12-16 22:35:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2021-12-16 22:35:13,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:13,039 INFO L514 BasicCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:13,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:13,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 22:35:13,257 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash 792981572, now seen corresponding path program 13 times [2021-12-16 22:35:13,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:13,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020294134] [2021-12-16 22:35:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:13,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:13,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891745829] [2021-12-16 22:35:13,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:35:13,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:13,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:13,315 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) [2021-12-16 22:35:13,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 22:35:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:35:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 22:35:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 13557 proven. 1365 refuted. 0 times theorem prover too weak. 36436 trivial. 0 not checked. [2021-12-16 22:35:14,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 2637 proven. 22495 refuted. 0 times theorem prover too weak. 26226 trivial. 0 not checked. [2021-12-16 22:35:15,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020294134] [2021-12-16 22:35:15,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891745829] [2021-12-16 22:35:15,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891745829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:15,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:15,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-12-16 22:35:15,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425880196] [2021-12-16 22:35:15,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:15,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:35:15,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:35:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:35:15,656 INFO L87 Difference]: Start difference. First operand 361 states and 395 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:15,760 INFO L93 Difference]: Finished difference Result 600 states and 670 transitions. [2021-12-16 22:35:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 22:35:15,761 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 724 [2021-12-16 22:35:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:15,763 INFO L225 Difference]: With dead ends: 600 [2021-12-16 22:35:15,763 INFO L226 Difference]: Without dead ends: 364 [2021-12-16 22:35:15,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1415 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:35:15,765 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:15,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 75 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:35:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-16 22:35:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2021-12-16 22:35:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.0919220055710306) internal successors, (392), 359 states have internal predecessors, (392), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 398 transitions. [2021-12-16 22:35:15,775 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 398 transitions. Word has length 724 [2021-12-16 22:35:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:15,776 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 398 transitions. [2021-12-16 22:35:15,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:35:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 398 transitions. [2021-12-16 22:35:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2021-12-16 22:35:15,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:15,782 INFO L514 BasicCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:15,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:15,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:15,995 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -91827407, now seen corresponding path program 14 times [2021-12-16 22:35:15,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844479104] [2021-12-16 22:35:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:15,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:16,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:16,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911787568] [2021-12-16 22:35:16,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:35:16,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:16,050 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) [2021-12-16 22:35:16,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 22:35:16,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:35:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:35:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 21850 proven. 484 refuted. 0 times theorem prover too weak. 30635 trivial. 0 not checked. [2021-12-16 22:35:17,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52485 trivial. 0 not checked. [2021-12-16 22:35:18,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844479104] [2021-12-16 22:35:18,534 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:35:18,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911787568] [2021-12-16 22:35:18,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911787568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:18,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:18,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-12-16 22:35:18,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317814939] [2021-12-16 22:35:18,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:18,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 22:35:18,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:18,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 22:35:18,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:35:18,537 INFO L87 Difference]: Start difference. First operand 364 states and 398 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:18,660 INFO L93 Difference]: Finished difference Result 603 states and 691 transitions. [2021-12-16 22:35:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-16 22:35:18,660 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 733 [2021-12-16 22:35:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:18,663 INFO L225 Difference]: With dead ends: 603 [2021-12-16 22:35:18,663 INFO L226 Difference]: Without dead ends: 412 [2021-12-16 22:35:18,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1464 GetRequests, 1418 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:35:18,664 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:18,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 78 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:35:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-12-16 22:35:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-12-16 22:35:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.0810810810810811) internal successors, (440), 407 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:35:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2021-12-16 22:35:18,675 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 733 [2021-12-16 22:35:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:18,676 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2021-12-16 22:35:18,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:35:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2021-12-16 22:35:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2021-12-16 22:35:18,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:18,683 INFO L514 BasicCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 46, 46, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:18,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-16 22:35:18,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:18,895 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1952749311, now seen corresponding path program 15 times [2021-12-16 22:35:18,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:18,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220585286] [2021-12-16 22:35:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:18,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:18,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:35:18,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806998851] [2021-12-16 22:35:18,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:35:18,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:18,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:18,950 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) [2021-12-16 22:35:18,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 22:46:20,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-12-16 22:46:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:20,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-16 22:46:20,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 54601 backedges. 21850 proven. 2116 refuted. 0 times theorem prover too weak. 30635 trivial. 0 not checked. [2021-12-16 22:46:21,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54601 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 52485 trivial. 0 not checked. [2021-12-16 22:46:23,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220585286] [2021-12-16 22:46:23,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 22:46:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806998851] [2021-12-16 22:46:23,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806998851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:23,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:46:23,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 61 [2021-12-16 22:46:23,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738500640] [2021-12-16 22:46:23,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:23,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-16 22:46:23,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-16 22:46:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-12-16 22:46:23,259 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 61 states have internal predecessors, (147), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:46:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:23,401 INFO L93 Difference]: Finished difference Result 629 states and 706 transitions. [2021-12-16 22:46:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-16 22:46:23,401 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 61 states have internal predecessors, (147), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 781 [2021-12-16 22:46:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:23,404 INFO L225 Difference]: With dead ends: 629 [2021-12-16 22:46:23,404 INFO L226 Difference]: Without dead ends: 438 [2021-12-16 22:46:23,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1500 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-12-16 22:46:23,406 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:23,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 178 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-16 22:46:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2021-12-16 22:46:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.0762124711316396) internal successors, (466), 433 states have internal predecessors, (466), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:46:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 472 transitions. [2021-12-16 22:46:23,417 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 472 transitions. Word has length 781 [2021-12-16 22:46:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:23,418 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 472 transitions. [2021-12-16 22:46:23,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 61 states have internal predecessors, (147), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:46:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 472 transitions. [2021-12-16 22:46:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2021-12-16 22:46:23,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:23,425 INFO L514 BasicCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 59, 59, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:23,625 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forcibly destroying the process [2021-12-16 22:46:23,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 137 [2021-12-16 22:46:23,672 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,SelfDestructingSolverStorable20 [2021-12-16 22:46:23,672 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1348616601, now seen corresponding path program 16 times [2021-12-16 22:46:23,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:23,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905730571] [2021-12-16 22:46:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:23,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:23,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 22:46:23,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163698279] [2021-12-16 22:46:23,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:46:23,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:23,733 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) [2021-12-16 22:46:23,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process Killed by 15