./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 42712a480385f40caa20979fd35763a8ad414af5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:33:55,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:33:55,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:33:55,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:33:55,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:33:55,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:33:55,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:33:55,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:33:55,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:33:55,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:33:55,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:33:55,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:33:55,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:33:55,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:33:55,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:33:55,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:33:55,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:33:55,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:33:55,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:33:55,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:33:55,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:33:55,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:33:55,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:33:55,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:33:55,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:33:55,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:33:55,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:33:55,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:33:55,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:33:55,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:33:55,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:33:55,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:33:55,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:33:55,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:33:55,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:33:55,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:33:55,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:33:55,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:33:55,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:33:55,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:33:55,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:33:55,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:33:55,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:33:55,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:33:55,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:33:55,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:33:55,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:33:55,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:33:55,808 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:33:55,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:33:55,808 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:33:55,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:33:55,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:33:55,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:33:55,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:33:55,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:33:55,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:33:55,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:33:55,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:33:55,817 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:33:55,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:33:55,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:33:55,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:33:55,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:33:55,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:33:55,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:33:55,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:33:55,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:33:55,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:33:55,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:33:55,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:33:55,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:33:55,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42712a480385f40caa20979fd35763a8ad414af5 [2021-08-29 16:33:56,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:33:56,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:33:56,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:33:56,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:33:56,047 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:33:56,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2021-08-29 16:33:56,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29940b920/c8fc8b40f94447bc897fe9a70e292f3c/FLAG710cd93d5 [2021-08-29 16:33:56,401 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:33:56,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2021-08-29 16:33:56,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29940b920/c8fc8b40f94447bc897fe9a70e292f3c/FLAG710cd93d5 [2021-08-29 16:33:56,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29940b920/c8fc8b40f94447bc897fe9a70e292f3c [2021-08-29 16:33:56,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:33:56,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:33:56,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:33:56,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:33:56,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:33:56,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:56,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af21da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56, skipping insertion in model container [2021-08-29 16:33:56,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:56,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:33:56,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:33:56,951 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2021-08-29 16:33:56,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:33:56,962 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:33:56,971 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2021-08-29 16:33:56,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:33:56,980 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:33:56,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56 WrapperNode [2021-08-29 16:33:56,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:33:56,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:33:56,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:33:56,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:33:56,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:56,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:33:57,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:33:57,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:33:57,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:33:57,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:33:57,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:33:57,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:33:57,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:33:57,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (1/1) ... [2021-08-29 16:33:57,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:33:57,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:57,070 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) [2021-08-29 16:33:57,092 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 [2021-08-29 16:33:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:33:57,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:33:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-08-29 16:33:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-08-29 16:33:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:33:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:33:57,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:33:57,212 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:33:57,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:57 BoogieIcfgContainer [2021-08-29 16:33:57,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:33:57,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:33:57,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:33:57,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:33:57,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:33:56" (1/3) ... [2021-08-29 16:33:57,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6744094d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:33:57, skipping insertion in model container [2021-08-29 16:33:57,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:56" (2/3) ... [2021-08-29 16:33:57,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6744094d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:33:57, skipping insertion in model container [2021-08-29 16:33:57,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:57" (3/3) ... [2021-08-29 16:33:57,219 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2021-08-29 16:33:57,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:33:57,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:33:57,257 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:33:57,269 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 16:33:57,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:33:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-29 16:33:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 16:33:57,283 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:57,283 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:57,283 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-08-29 16:33:57,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:57,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549995292] [2021-08-29 16:33:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:57,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:57,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:33:57,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:57,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549995292] [2021-08-29 16:33:57,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549995292] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:33:57,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:33:57,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:33:57,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741428280] [2021-08-29 16:33:57,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:33:57,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:33:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:33:57,526 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:33:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:57,576 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-29 16:33:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:33:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-29 16:33:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:57,585 INFO L225 Difference]: With dead ends: 25 [2021-08-29 16:33:57,585 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 16:33:57,587 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.29ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 16:33:57,591 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.74ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:57,592 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 31.74ms Time] [2021-08-29 16:33:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 16:33:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 16:33:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-29 16:33:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-29 16:33:57,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-08-29 16:33:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:57,621 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-29 16:33:57,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:33:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-29 16:33:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 16:33:57,622 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:57,622 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:57,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:33:57,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-08-29 16:33:57,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:57,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712950087] [2021-08-29 16:33:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:57,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:33:57,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:57,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712950087] [2021-08-29 16:33:57,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712950087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:57,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012450956] [2021-08-29 16:33:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:57,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:57,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:57,713 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) [2021-08-29 16:33:57,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:33:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:57,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:33:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:33:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:33:57,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012450956] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:57,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:57,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2021-08-29 16:33:57,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233345192] [2021-08-29 16:33:57,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 16:33:57,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:57,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 16:33:57,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-29 16:33:57,987 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:33:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:58,041 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-29 16:33:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 16:33:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-08-29 16:33:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:58,042 INFO L225 Difference]: With dead ends: 22 [2021-08-29 16:33:58,042 INFO L226 Difference]: Without dead ends: 18 [2021-08-29 16:33:58,044 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.31ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-29 16:33:58,045 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.88ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:58,046 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 37.88ms Time] [2021-08-29 16:33:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-29 16:33:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-29 16:33:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-29 16:33:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-29 16:33:58,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-29 16:33:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:58,053 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-29 16:33:58,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:33:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-29 16:33:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 16:33:58,058 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:58,058 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:58,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 16:33:58,273 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 [2021-08-29 16:33:58,273 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-08-29 16:33:58,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:58,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714655953] [2021-08-29 16:33:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:58,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:58,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:58,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:58,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:33:58,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:58,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714655953] [2021-08-29 16:33:58,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714655953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:58,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839187886] [2021-08-29 16:33:58,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:33:58,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:58,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:58,409 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) [2021-08-29 16:33:58,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 16:33:58,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:33:58,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:33:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:33:58,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 16:33:58,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839187886] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:58,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:58,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2021-08-29 16:33:58,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758715091] [2021-08-29 16:33:58,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 16:33:58,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:58,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 16:33:58,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-29 16:33:58,777 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:33:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:58,841 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-29 16:33:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 16:33:58,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-08-29 16:33:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:58,842 INFO L225 Difference]: With dead ends: 25 [2021-08-29 16:33:58,842 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 16:33:58,843 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.02ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-29 16:33:58,844 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.42ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:58,844 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 73 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 37.42ms Time] [2021-08-29 16:33:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 16:33:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-29 16:33:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-29 16:33:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-29 16:33:58,848 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-08-29 16:33:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:58,848 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-29 16:33:58,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:33:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-29 16:33:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 16:33:58,850 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:58,850 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:58,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:59,060 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 [2021-08-29 16:33:59,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:59,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:59,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-08-29 16:33:59,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:59,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647949949] [2021-08-29 16:33:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:59,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:59,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:59,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:59,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:59,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:33:59,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647949949] [2021-08-29 16:33:59,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647949949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966268621] [2021-08-29 16:33:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:33:59,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:59,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:59,163 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) [2021-08-29 16:33:59,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 16:33:59,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 16:33:59,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 16:33:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:33:59,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:33:59,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966268621] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:59,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:59,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2021-08-29 16:33:59,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726534336] [2021-08-29 16:33:59,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 16:33:59,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 16:33:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-29 16:33:59,647 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-08-29 16:33:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:59,708 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-08-29 16:33:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 16:33:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2021-08-29 16:33:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:59,710 INFO L225 Difference]: With dead ends: 28 [2021-08-29 16:33:59,710 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 16:33:59,710 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 67.07ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-08-29 16:33:59,712 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.01ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:59,712 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 89 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 38.01ms Time] [2021-08-29 16:33:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 16:33:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-29 16:33:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-29 16:33:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-29 16:33:59,715 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-08-29 16:33:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:59,715 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-29 16:33:59,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-08-29 16:33:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-29 16:33:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-29 16:33:59,716 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:59,717 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:59,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:59,920 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 [2021-08-29 16:33:59,921 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-08-29 16:33:59,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:59,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059639126] [2021-08-29 16:33:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:59,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:59,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:59,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:00,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:00,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:00,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-29 16:34:00,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:00,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059639126] [2021-08-29 16:34:00,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059639126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:00,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551929371] [2021-08-29 16:34:00,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:34:00,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:00,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:00,060 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) [2021-08-29 16:34:00,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 16:34:00,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:34:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:00,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 16:34:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-29 16:34:00,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-29 16:34:00,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551929371] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:00,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:00,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2021-08-29 16:34:00,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822839161] [2021-08-29 16:34:00,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 16:34:00,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 16:34:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-29 16:34:00,688 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-08-29 16:34:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:00,765 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-29 16:34:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:34:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2021-08-29 16:34:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:00,766 INFO L225 Difference]: With dead ends: 31 [2021-08-29 16:34:00,768 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 16:34:00,769 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 87.32ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-08-29 16:34:00,770 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.70ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:00,771 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 91 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 47.70ms Time] [2021-08-29 16:34:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 16:34:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 16:34:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-29 16:34:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-29 16:34:00,780 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-08-29 16:34:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:00,780 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-29 16:34:00,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-08-29 16:34:00,781 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-29 16:34:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-29 16:34:00,781 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:00,781 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:00,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:00,984 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 [2021-08-29 16:34:00,985 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-08-29 16:34:00,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:00,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777715710] [2021-08-29 16:34:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:00,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:01,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:01,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:01,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:01,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:01,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:01,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-29 16:34:01,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:01,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777715710] [2021-08-29 16:34:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777715710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:01,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629132895] [2021-08-29 16:34:01,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:34:01,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:01,122 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) [2021-08-29 16:34:01,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 16:34:01,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-29 16:34:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 16:34:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-29 16:34:01,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:34:01,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629132895] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:01,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:01,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2021-08-29 16:34:01,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979056007] [2021-08-29 16:34:01,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-29 16:34:01,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-29 16:34:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-29 16:34:01,973 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-08-29 16:34:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:02,063 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-08-29 16:34:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 16:34:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2021-08-29 16:34:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:02,064 INFO L225 Difference]: With dead ends: 34 [2021-08-29 16:34:02,064 INFO L226 Difference]: Without dead ends: 30 [2021-08-29 16:34:02,064 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 99.49ms TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2021-08-29 16:34:02,065 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.72ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:02,065 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 4 Invalid, 120 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [16 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 54.72ms Time] [2021-08-29 16:34:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-29 16:34:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-29 16:34:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-08-29 16:34:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-29 16:34:02,068 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-08-29 16:34:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:02,068 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-29 16:34:02,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-08-29 16:34:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-29 16:34:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-29 16:34:02,069 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:02,070 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:02,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:02,276 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 [2021-08-29 16:34:02,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-08-29 16:34:02,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:02,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034699138] [2021-08-29 16:34:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:02,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-29 16:34:02,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:02,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034699138] [2021-08-29 16:34:02,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034699138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:02,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093625817] [2021-08-29 16:34:02,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:34:02,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:02,380 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) [2021-08-29 16:34:02,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 16:34:02,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-29 16:34:02,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-29 16:34:02,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-29 16:34:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-29 16:34:03,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093625817] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:03,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:03,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2021-08-29 16:34:03,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499799033] [2021-08-29 16:34:03,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-29 16:34:03,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-29 16:34:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-29 16:34:03,545 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-08-29 16:34:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:03,665 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-29 16:34:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 16:34:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2021-08-29 16:34:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:03,668 INFO L225 Difference]: With dead ends: 37 [2021-08-29 16:34:03,668 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 16:34:03,669 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 124.26ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-08-29 16:34:03,670 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 97 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.40ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:03,670 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 4 Invalid, 170 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [41 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 69.40ms Time] [2021-08-29 16:34:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 16:34:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-29 16:34:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-08-29 16:34:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-29 16:34:03,681 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-08-29 16:34:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:03,681 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-29 16:34:03,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-08-29 16:34:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-29 16:34:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-29 16:34:03,686 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:03,686 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:03,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:03,886 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 [2021-08-29 16:34:03,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-08-29 16:34:03,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:03,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940066936] [2021-08-29 16:34:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:03,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:03,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:03,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:03,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:03,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:04,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:04,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:34:04,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:04,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940066936] [2021-08-29 16:34:04,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940066936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:04,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578902042] [2021-08-29 16:34:04,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:34:04,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:04,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:04,044 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) [2021-08-29 16:34:04,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 16:34:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:04,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 16:34:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:34:04,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-29 16:34:05,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578902042] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:05,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:05,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2021-08-29 16:34:05,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535079279] [2021-08-29 16:34:05,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-29 16:34:05,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-29 16:34:05,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-29 16:34:05,600 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:34:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:05,725 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-29 16:34:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 16:34:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-08-29 16:34:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:05,726 INFO L225 Difference]: With dead ends: 40 [2021-08-29 16:34:05,726 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 16:34:05,727 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 139.90ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-08-29 16:34:05,727 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 150 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.41ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:05,728 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 3 Invalid, 179 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [67 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 74.41ms Time] [2021-08-29 16:34:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 16:34:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-29 16:34:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-29 16:34:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-29 16:34:05,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-08-29 16:34:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:05,731 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-29 16:34:05,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:34:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-29 16:34:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-29 16:34:05,732 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:05,732 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:05,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:05,944 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 [2021-08-29 16:34:05,945 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-08-29 16:34:05,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:05,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467557222] [2021-08-29 16:34:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:05,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:05,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:05,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:34:06,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:06,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467557222] [2021-08-29 16:34:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467557222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:06,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643877932] [2021-08-29 16:34:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:34:06,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:06,106 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) [2021-08-29 16:34:06,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 16:34:06,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:34:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-29 16:34:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:34:06,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-29 16:34:08,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643877932] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:08,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:08,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2021-08-29 16:34:08,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46410752] [2021-08-29 16:34:08,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-29 16:34:08,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-29 16:34:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-08-29 16:34:08,206 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-08-29 16:34:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:08,350 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-29 16:34:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 16:34:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2021-08-29 16:34:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:08,352 INFO L225 Difference]: With dead ends: 43 [2021-08-29 16:34:08,352 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 16:34:08,353 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 165.76ms TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-08-29 16:34:08,353 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 63 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.28ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:08,354 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 4 Invalid, 170 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [23 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 95.28ms Time] [2021-08-29 16:34:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 16:34:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-29 16:34:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-08-29 16:34:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-29 16:34:08,357 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-08-29 16:34:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:08,357 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-29 16:34:08,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-08-29 16:34:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-29 16:34:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-29 16:34:08,358 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:08,358 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:08,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:08,574 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 [2021-08-29 16:34:08,575 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-08-29 16:34:08,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:08,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049470370] [2021-08-29 16:34:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:08,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-29 16:34:08,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:08,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049470370] [2021-08-29 16:34:08,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049470370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:08,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737098465] [2021-08-29 16:34:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:34:08,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:08,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:08,733 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) [2021-08-29 16:34:08,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 16:34:08,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-29 16:34:08,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:08,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-29 16:34:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-29 16:34:08,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-29 16:34:11,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737098465] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:11,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:11,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2021-08-29 16:34:11,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180306009] [2021-08-29 16:34:11,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-29 16:34:11,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:11,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-29 16:34:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-08-29 16:34:11,360 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-08-29 16:34:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:11,529 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-08-29 16:34:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 16:34:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2021-08-29 16:34:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:11,532 INFO L225 Difference]: With dead ends: 46 [2021-08-29 16:34:11,532 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 16:34:11,532 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 191.90ms TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2021-08-29 16:34:11,533 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.35ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:11,533 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 4 Invalid, 249 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [79 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 111.35ms Time] [2021-08-29 16:34:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 16:34:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-29 16:34:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-29 16:34:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-29 16:34:11,536 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-08-29 16:34:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:11,536 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-29 16:34:11,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-08-29 16:34:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-29 16:34:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-29 16:34:11,537 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:11,537 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:11,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:11,740 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 [2021-08-29 16:34:11,741 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-08-29 16:34:11,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:11,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313298402] [2021-08-29 16:34:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:11,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-08-29 16:34:11,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:11,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313298402] [2021-08-29 16:34:11,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313298402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:11,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053206711] [2021-08-29 16:34:11,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:34:11,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:11,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:11,917 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) [2021-08-29 16:34:11,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 16:34:12,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:34:12,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-29 16:34:12,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-08-29 16:34:12,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-29 16:34:15,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053206711] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:15,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:15,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2021-08-29 16:34:15,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646327770] [2021-08-29 16:34:15,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-29 16:34:15,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-29 16:34:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-08-29 16:34:15,294 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-08-29 16:34:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:15,452 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-08-29 16:34:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-29 16:34:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2021-08-29 16:34:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:15,454 INFO L225 Difference]: With dead ends: 49 [2021-08-29 16:34:15,454 INFO L226 Difference]: Without dead ends: 45 [2021-08-29 16:34:15,454 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 205.68ms TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2021-08-29 16:34:15,455 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 78 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.33ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:15,455 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 3 Invalid, 201 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [28 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 91.33ms Time] [2021-08-29 16:34:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-29 16:34:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-29 16:34:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-08-29 16:34:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-29 16:34:15,461 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-08-29 16:34:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:15,462 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-29 16:34:15,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-08-29 16:34:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-29 16:34:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-29 16:34:15,462 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:15,462 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:15,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:15,668 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 [2021-08-29 16:34:15,668 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-08-29 16:34:15,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:15,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722700882] [2021-08-29 16:34:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:15,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-08-29 16:34:15,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:15,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722700882] [2021-08-29 16:34:15,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722700882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:15,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181868472] [2021-08-29 16:34:15,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:34:15,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:15,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:15,901 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) [2021-08-29 16:34:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-29 16:34:16,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-29 16:34:16,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:16,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-29 16:34:16,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-08-29 16:34:16,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-29 16:34:20,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181868472] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:20,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:20,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2021-08-29 16:34:20,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845410042] [2021-08-29 16:34:20,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-29 16:34:20,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:20,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-29 16:34:20,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-08-29 16:34:20,148 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-08-29 16:34:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:20,334 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-08-29 16:34:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 16:34:20,334 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2021-08-29 16:34:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:20,335 INFO L225 Difference]: With dead ends: 52 [2021-08-29 16:34:20,335 INFO L226 Difference]: Without dead ends: 48 [2021-08-29 16:34:20,336 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 224.77ms TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2021-08-29 16:34:20,336 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 111 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.86ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:20,336 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 3 Invalid, 208 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [44 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 113.86ms Time] [2021-08-29 16:34:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-29 16:34:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-29 16:34:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-08-29 16:34:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-08-29 16:34:20,339 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-08-29 16:34:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:20,340 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-08-29 16:34:20,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-08-29 16:34:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-08-29 16:34:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-29 16:34:20,340 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:20,340 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:20,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:20,540 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 [2021-08-29 16:34:20,541 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:20,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:20,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-08-29 16:34:20,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:20,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050149579] [2021-08-29 16:34:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:20,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-08-29 16:34:20,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:20,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050149579] [2021-08-29 16:34:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050149579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:20,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866774359] [2021-08-29 16:34:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:34:20,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:20,764 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) [2021-08-29 16:34:20,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-29 16:34:21,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-29 16:34:21,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:21,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 16:34:21,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-08-29 16:34:21,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-29 16:34:25,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866774359] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:25,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:25,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2021-08-29 16:34:25,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729109820] [2021-08-29 16:34:25,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-29 16:34:25,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:25,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-29 16:34:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2021-08-29 16:34:25,976 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-08-29 16:34:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:26,152 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-08-29 16:34:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 16:34:26,152 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2021-08-29 16:34:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:26,153 INFO L225 Difference]: With dead ends: 55 [2021-08-29 16:34:26,153 INFO L226 Difference]: Without dead ends: 51 [2021-08-29 16:34:26,154 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 263.83ms TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2021-08-29 16:34:26,154 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 198 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.02ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:26,154 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 3 Invalid, 257 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [86 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 89.02ms Time] [2021-08-29 16:34:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-29 16:34:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-29 16:34:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-08-29 16:34:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-08-29 16:34:26,157 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-08-29 16:34:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:26,158 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-08-29 16:34:26,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-08-29 16:34:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-08-29 16:34:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-29 16:34:26,158 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:26,159 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:26,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-29 16:34:26,377 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 [2021-08-29 16:34:26,378 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-08-29 16:34:26,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:26,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885520222] [2021-08-29 16:34:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:26,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-08-29 16:34:26,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:26,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885520222] [2021-08-29 16:34:26,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885520222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:26,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287746974] [2021-08-29 16:34:26,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:34:26,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:26,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:26,624 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) [2021-08-29 16:34:26,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-29 16:34:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-29 16:34:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-08-29 16:34:27,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-29 16:34:33,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287746974] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:33,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:33,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2021-08-29 16:34:33,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471989885] [2021-08-29 16:34:33,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-29 16:34:33,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-29 16:34:33,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-08-29 16:34:33,130 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-08-29 16:34:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:33,333 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-08-29 16:34:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-29 16:34:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2021-08-29 16:34:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:33,339 INFO L225 Difference]: With dead ends: 58 [2021-08-29 16:34:33,339 INFO L226 Difference]: Without dead ends: 54 [2021-08-29 16:34:33,340 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 270.95ms TimeCoverageRelationStatistics Valid=739, Invalid=1517, Unknown=0, NotChecked=0, Total=2256 [2021-08-29 16:34:33,340 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 384 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.68ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:33,340 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 4 Invalid, 383 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [183 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 120.68ms Time] [2021-08-29 16:34:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-29 16:34:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-29 16:34:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-08-29 16:34:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-08-29 16:34:33,343 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-08-29 16:34:33,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:33,344 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-08-29 16:34:33,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-08-29 16:34:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-08-29 16:34:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-29 16:34:33,345 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:33,345 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:33,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:33,548 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 [2021-08-29 16:34:33,549 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-08-29 16:34:33,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:33,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063436498] [2021-08-29 16:34:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:33,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-08-29 16:34:33,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:33,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063436498] [2021-08-29 16:34:33,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063436498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:33,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982389885] [2021-08-29 16:34:33,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:34:33,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:33,801 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) [2021-08-29 16:34:33,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-29 16:34:34,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:34:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:34,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-29 16:34:34,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-08-29 16:34:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-08-29 16:34:41,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982389885] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:41,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:41,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2021-08-29 16:34:41,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647676626] [2021-08-29 16:34:41,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-29 16:34:41,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:41,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-29 16:34:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2021-08-29 16:34:41,899 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-08-29 16:34:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:42,097 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-08-29 16:34:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 16:34:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2021-08-29 16:34:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:42,098 INFO L225 Difference]: With dead ends: 61 [2021-08-29 16:34:42,098 INFO L226 Difference]: Without dead ends: 57 [2021-08-29 16:34:42,100 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 296.79ms TimeCoverageRelationStatistics Valid=836, Invalid=1714, Unknown=0, NotChecked=0, Total=2550 [2021-08-29 16:34:42,100 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 166 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.25ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:42,100 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 3 Invalid, 283 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [68 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 110.25ms Time] [2021-08-29 16:34:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-29 16:34:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-29 16:34:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-08-29 16:34:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-08-29 16:34:42,103 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-08-29 16:34:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:42,103 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-08-29 16:34:42,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-08-29 16:34:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-08-29 16:34:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-29 16:34:42,104 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:42,104 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:42,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:42,312 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 [2021-08-29 16:34:42,313 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-08-29 16:34:42,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:42,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318587754] [2021-08-29 16:34:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:42,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-08-29 16:34:42,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:42,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318587754] [2021-08-29 16:34:42,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318587754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:42,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305271413] [2021-08-29 16:34:42,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:34:42,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:42,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:42,593 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) [2021-08-29 16:34:42,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-29 16:34:43,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-29 16:34:43,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-29 16:34:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-08-29 16:34:43,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-29 16:34:52,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305271413] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:52,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:52,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2021-08-29 16:34:52,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15896586] [2021-08-29 16:34:52,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-29 16:34:52,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-29 16:34:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-08-29 16:34:52,274 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-08-29 16:34:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:52,513 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-08-29 16:34:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 16:34:52,514 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2021-08-29 16:34:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:52,514 INFO L225 Difference]: With dead ends: 64 [2021-08-29 16:34:52,515 INFO L226 Difference]: Without dead ends: 60 [2021-08-29 16:34:52,516 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 355.10ms TimeCoverageRelationStatistics Valid=939, Invalid=1923, Unknown=0, NotChecked=0, Total=2862 [2021-08-29 16:34:52,516 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 204 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.44ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:52,517 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 4 Invalid, 323 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [89 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 125.44ms Time] [2021-08-29 16:34:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-29 16:34:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-29 16:34:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-08-29 16:34:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-08-29 16:34:52,522 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-08-29 16:34:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:52,523 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-08-29 16:34:52,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-08-29 16:34:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-08-29 16:34:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-29 16:34:52,524 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:52,524 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:52,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:52,740 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 [2021-08-29 16:34:52,741 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-08-29 16:34:52,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:52,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62719646] [2021-08-29 16:34:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:52,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:52,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:53,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:53,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:53,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:53,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-08-29 16:34:53,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:53,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62719646] [2021-08-29 16:34:53,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62719646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:53,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148669065] [2021-08-29 16:34:53,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:34:53,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:53,083 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) [2021-08-29 16:34:53,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-29 16:34:53,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:34:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-29 16:34:53,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-08-29 16:34:53,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:35:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-08-29 16:35:05,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148669065] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:35:05,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:35:05,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 40 [2021-08-29 16:35:05,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100296930] [2021-08-29 16:35:05,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-29 16:35:05,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:05,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-29 16:35:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-08-29 16:35:05,135 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-08-29 16:35:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:05,486 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-08-29 16:35:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-29 16:35:05,486 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2021-08-29 16:35:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:05,487 INFO L225 Difference]: With dead ends: 67 [2021-08-29 16:35:05,487 INFO L226 Difference]: Without dead ends: 63 [2021-08-29 16:35:05,488 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 435.00ms TimeCoverageRelationStatistics Valid=1048, Invalid=2144, Unknown=0, NotChecked=0, Total=3192 [2021-08-29 16:35:05,489 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 396 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.83ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:05,489 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 3 Invalid, 414 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [185 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 193.83ms Time] [2021-08-29 16:35:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-29 16:35:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-29 16:35:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-08-29 16:35:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-08-29 16:35:05,492 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-08-29 16:35:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:05,492 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-08-29 16:35:05,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-08-29 16:35:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-08-29 16:35:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-29 16:35:05,493 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:05,493 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:35:05,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-29 16:35:05,712 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 [2021-08-29 16:35:05,713 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:35:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-08-29 16:35:05,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:05,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966101636] [2021-08-29 16:35:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:05,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:05,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-08-29 16:35:06,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:06,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966101636] [2021-08-29 16:35:06,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966101636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:35:06,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450318571] [2021-08-29 16:35:06,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:35:06,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:06,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:35:06,121 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) [2021-08-29 16:35:06,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-29 16:35:07,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-29 16:35:07,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:35:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-29 16:35:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:35:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-08-29 16:35:07,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:35:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-29 16:35:20,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450318571] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:35:20,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:35:20,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 42 [2021-08-29 16:35:20,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117019112] [2021-08-29 16:35:20,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-29 16:35:20,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:20,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-29 16:35:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2021-08-29 16:35:20,683 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-08-29 16:35:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:20,931 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-08-29 16:35:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-29 16:35:20,932 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 112 [2021-08-29 16:35:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:20,933 INFO L225 Difference]: With dead ends: 70 [2021-08-29 16:35:20,933 INFO L226 Difference]: Without dead ends: 66 [2021-08-29 16:35:20,934 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 431.55ms TimeCoverageRelationStatistics Valid=1163, Invalid=2377, Unknown=0, NotChecked=0, Total=3540 [2021-08-29 16:35:20,934 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 157 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.92ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:20,934 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 3 Invalid, 317 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 113.92ms Time] [2021-08-29 16:35:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-29 16:35:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-29 16:35:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-08-29 16:35:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-08-29 16:35:20,937 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-08-29 16:35:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:20,937 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-08-29 16:35:20,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-08-29 16:35:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-08-29 16:35:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-29 16:35:20,938 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:20,938 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:35:20,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-29 16:35:21,150 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 [2021-08-29 16:35:21,151 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:35:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-08-29 16:35:21,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:21,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267561542] [2021-08-29 16:35:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:21,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-08-29 16:35:21,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:21,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267561542] [2021-08-29 16:35:21,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267561542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:35:21,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705865285] [2021-08-29 16:35:21,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:35:21,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:21,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:35:21,581 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) [2021-08-29 16:35:21,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-29 16:35:22,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-08-29 16:35:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:35:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-29 16:35:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:35:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-08-29 16:35:23,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:35:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-08-29 16:35:38,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705865285] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:35:38,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:35:38,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 44 [2021-08-29 16:35:38,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825212046] [2021-08-29 16:35:38,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-29 16:35:38,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:38,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-29 16:35:38,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1406, Unknown=0, NotChecked=0, Total=1892 [2021-08-29 16:35:38,883 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 22 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-08-29 16:35:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:39,154 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-08-29 16:35:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-29 16:35:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 22 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 118 [2021-08-29 16:35:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:39,156 INFO L225 Difference]: With dead ends: 73 [2021-08-29 16:35:39,156 INFO L226 Difference]: Without dead ends: 69 [2021-08-29 16:35:39,156 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 460.48ms TimeCoverageRelationStatistics Valid=1284, Invalid=2622, Unknown=0, NotChecked=0, Total=3906 [2021-08-29 16:35:39,157 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 86 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.98ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:39,157 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 3 Invalid, 295 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [24 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 130.98ms Time] [2021-08-29 16:35:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-29 16:35:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-29 16:35:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-08-29 16:35:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-08-29 16:35:39,160 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-08-29 16:35:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:39,160 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-08-29 16:35:39,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 22 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-08-29 16:35:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-08-29 16:35:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-29 16:35:39,161 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:39,161 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:35:39,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-29 16:35:39,361 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 [2021-08-29 16:35:39,361 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:35:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:39,362 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-08-29 16:35:39,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:39,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170805132] [2021-08-29 16:35:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:39,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-08-29 16:35:39,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:39,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170805132] [2021-08-29 16:35:39,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170805132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:35:39,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278318951] [2021-08-29 16:35:39,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:35:39,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:39,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:35:39,829 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) [2021-08-29 16:35:39,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-29 16:35:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-29 16:35:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:35:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-08-29 16:35:41,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:36:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-29 16:36:00,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278318951] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:36:00,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:36:00,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 45 [2021-08-29 16:36:00,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726732302] [2021-08-29 16:36:00,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-29 16:36:00,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:36:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-29 16:36:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2021-08-29 16:36:00,277 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2021-08-29 16:36:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:36:00,563 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-08-29 16:36:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-29 16:36:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) Word has length 124 [2021-08-29 16:36:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:36:00,564 INFO L225 Difference]: With dead ends: 76 [2021-08-29 16:36:00,565 INFO L226 Difference]: Without dead ends: 72 [2021-08-29 16:36:00,566 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 477.43ms TimeCoverageRelationStatistics Valid=1408, Invalid=2752, Unknown=0, NotChecked=0, Total=4160 [2021-08-29 16:36:00,566 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 419 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.32ms IncrementalHoareTripleChecker+Time [2021-08-29 16:36:00,566 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 3 Invalid, 438 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [194 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 146.32ms Time] [2021-08-29 16:36:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-29 16:36:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-08-29 16:36:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-08-29 16:36:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-08-29 16:36:00,569 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-08-29 16:36:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:36:00,569 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-08-29 16:36:00,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2021-08-29 16:36:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-08-29 16:36:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-29 16:36:00,570 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:36:00,570 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:36:00,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-29 16:36:00,792 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 [2021-08-29 16:36:00,792 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:36:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:36:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-08-29 16:36:00,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:36:00,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778106555] [2021-08-29 16:36:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:36:00,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:36:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:00,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:00,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:01,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:02,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:02,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:02,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-08-29 16:36:02,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:36:02,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778106555] [2021-08-29 16:36:02,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778106555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:36:02,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953448247] [2021-08-29 16:36:02,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:36:02,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:36:02,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:36:02,202 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) [2021-08-29 16:36:02,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-29 16:36:03,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:36:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:36:03,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 177 conjunts are in the unsatisfiable core [2021-08-29 16:36:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:36:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2021-08-29 16:36:05,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:36:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2021-08-29 16:36:14,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953448247] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:36:14,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:36:14,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 99 [2021-08-29 16:36:14,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725954644] [2021-08-29 16:36:14,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-29 16:36:14,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:36:14,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-29 16:36:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=9105, Unknown=0, NotChecked=0, Total=9702 [2021-08-29 16:36:14,208 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 99 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 56 states have internal predecessors, (104), 7 states have call successors, (7), 1 states have call predecessors, (7), 42 states have return successors, (44), 43 states have call predecessors, (44), 7 states have call successors, (44) [2021-08-29 16:36:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:36:17,644 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-08-29 16:36:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-29 16:36:17,645 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 56 states have internal predecessors, (104), 7 states have call successors, (7), 1 states have call predecessors, (7), 42 states have return successors, (44), 43 states have call predecessors, (44), 7 states have call successors, (44) Word has length 130 [2021-08-29 16:36:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:36:17,645 INFO L225 Difference]: With dead ends: 75 [2021-08-29 16:36:17,646 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 16:36:17,649 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 228 SyntacticMatches, 22 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4824 ImplicationChecksByTransitivity, 5212.20ms TimeCoverageRelationStatistics Valid=1505, Invalid=19375, Unknown=0, NotChecked=0, Total=20880 [2021-08-29 16:36:17,650 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1111.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 3946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.99ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1342.16ms IncrementalHoareTripleChecker+Time [2021-08-29 16:36:17,650 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 7 Invalid, 3946 Unknown, 0 Unchecked, 10.99ms Time], IncrementalHoareTripleChecker [92 Valid, 3854 Invalid, 0 Unknown, 0 Unchecked, 1342.16ms Time] [2021-08-29 16:36:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 16:36:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 16:36:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 16:36:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 16:36:17,651 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2021-08-29 16:36:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:36:17,651 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 16:36:17,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 56 states have internal predecessors, (104), 7 states have call successors, (7), 1 states have call predecessors, (7), 42 states have return successors, (44), 43 states have call predecessors, (44), 7 states have call successors, (44) [2021-08-29 16:36:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 16:36:17,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 16:36:17,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:36:17,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-29 16:36:17,860 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 [2021-08-29 16:36:17,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 16:36:17,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:36:17,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:36:17,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:36:17,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:36:17,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-08-29 16:36:17,879 INFO L854 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 0) (= ULTIMATE.start_main_~a~0 20)) [2021-08-29 16:36:17,879 INFO L858 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-08-29 16:36:17,880 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-08-29 16:36:17,880 INFO L858 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2021-08-29 16:36:17,880 INFO L854 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 sum_~n)) [2021-08-29 16:36:17,880 INFO L858 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2021-08-29 16:36:17,880 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2021-08-29 16:36:17,880 INFO L858 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2021-08-29 16:36:17,880 INFO L861 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-08-29 16:36:17,883 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:36:17,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:36:17 BoogieIcfgContainer [2021-08-29 16:36:17,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:36:17,885 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:36:17,885 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:36:17,886 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:36:17,886 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:57" (3/4) ... [2021-08-29 16:36:17,888 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 16:36:17,892 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2021-08-29 16:36:17,894 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-29 16:36:17,894 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-29 16:36:17,895 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:36:17,895 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:36:17,911 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:36:17,911 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:36:17,912 INFO L158 Benchmark]: Toolchain (without parser) took 141078.80ms. Allocated memory was 69.2MB in the beginning and 337.6MB in the end (delta: 268.4MB). Free memory was 51.7MB in the beginning and 147.3MB in the end (delta: -95.6MB). Peak memory consumption was 171.9MB. Max. memory is 16.1GB. [2021-08-29 16:36:17,912 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 50.6MB in the beginning and 50.6MB in the end (delta: 54.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:36:17,912 INFO L158 Benchmark]: CACSL2BoogieTranslator took 148.49ms. Allocated memory is still 69.2MB. Free memory was 51.3MB in the beginning and 42.2MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:36:17,912 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.72ms. Allocated memory is still 69.2MB. Free memory was 42.2MB in the beginning and 40.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:36:17,912 INFO L158 Benchmark]: Boogie Preprocessor took 42.68ms. Allocated memory is still 69.2MB. Free memory was 40.9MB in the beginning and 52.2MB in the end (delta: -11.3MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2021-08-29 16:36:17,913 INFO L158 Benchmark]: RCFGBuilder took 166.37ms. Allocated memory is still 69.2MB. Free memory was 52.2MB in the beginning and 44.1MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:36:17,913 INFO L158 Benchmark]: TraceAbstraction took 140669.81ms. Allocated memory was 69.2MB in the beginning and 337.6MB in the end (delta: 268.4MB). Free memory was 43.6MB in the beginning and 149.4MB in the end (delta: -105.8MB). Peak memory consumption was 162.8MB. Max. memory is 16.1GB. [2021-08-29 16:36:17,913 INFO L158 Benchmark]: Witness Printer took 25.98ms. Allocated memory is still 337.6MB. Free memory was 149.4MB in the beginning and 147.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:36:17,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 50.6MB in the beginning and 50.6MB in the end (delta: 54.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 148.49ms. Allocated memory is still 69.2MB. Free memory was 51.3MB in the beginning and 42.2MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.72ms. Allocated memory is still 69.2MB. Free memory was 42.2MB in the beginning and 40.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.68ms. Allocated memory is still 69.2MB. Free memory was 40.9MB in the beginning and 52.2MB in the end (delta: -11.3MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * RCFGBuilder took 166.37ms. Allocated memory is still 69.2MB. Free memory was 52.2MB in the beginning and 44.1MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 140669.81ms. Allocated memory was 69.2MB in the beginning and 337.6MB in the end (delta: 268.4MB). Free memory was 43.6MB in the beginning and 149.4MB in the end (delta: -105.8MB). Peak memory consumption was 162.8MB. Max. memory is 16.1GB. * Witness Printer took 25.98ms. Allocated memory is still 337.6MB. Free memory was 149.4MB in the beginning and 147.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 140626.63ms, OverallIterations: 21, TraceHistogramMax: 21, EmptinessCheckTime: 25.93ms, AutomataDifference: 6845.67ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 17.69ms, InitialAbstractionConstructionTime: 7.99ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3162 SdHoareTripleChecker+Valid, 3175.70ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2890 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 2596.32ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2769 mSDsCounter, 1307 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7003 IncrementalHoareTripleChecker+Invalid, 8310 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1307 mSolverCounterUnsat, 42 mSDtfsCounter, 7003 mSolverCounterSat, 42.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3915 GetRequests, 3042 SyntacticMatches, 24 SemanticMatches, 849 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13202 ImplicationChecksByTransitivity, 9658.12ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, InterpolantAutomatonStates: 340, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 90.50ms AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 5.33ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 7.04ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 188.07ms SsaConstructionTime, 701.27ms SatisfiabilityAnalysisTime, 119973.69ms InterpolantComputationTime, 2930 NumberOfCodeBlocks, 2930 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 4329 ConstructedInterpolants, 0 QuantifiedInterpolants, 14477 SizeOfPredicates, 237 NumberOfNonLiveVariables, 4920 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 61 InterpolantComputations, 1 PerfectInterpolantSequences, 11291/26460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-29 16:36:17,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...