./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/Addition03-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:47:34,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:47:34,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:47:35,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:47:35,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:47:35,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:47:35,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:47:35,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:47:35,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:47:35,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:47:35,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:47:35,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:47:35,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:47:35,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:47:35,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:47:35,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:47:35,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:47:35,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:47:35,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:47:35,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:47:35,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:47:35,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:47:35,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:47:35,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:47:35,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:47:35,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:47:35,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:47:35,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:47:35,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:47:35,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:47:35,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:47:35,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:47:35,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:47:35,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:47:35,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:47:35,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:47:35,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:47:35,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:47:35,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:47:35,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:47:35,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:47:35,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:47:35,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:47:35,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:47:35,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:47:35,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:47:35,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:47:35,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:47:35,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:47:35,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:47:35,089 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:47:35,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:47:35,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:47:35,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:47:35,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:47:35,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:47:35,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:47:35,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:47:35,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:47:35,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:47:35,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:47:35,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:47:35,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:47:35,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:47:35,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:47:35,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:47:35,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:47:35,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:47:35,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:47:35,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:47:35,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:47:35,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:47:35,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:47:35,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:47:35,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:47:35,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:47:35,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b [2021-12-14 14:47:35,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:47:35,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:47:35,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:47:35,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:47:35,309 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:47:35,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition03-1.c [2021-12-14 14:47:35,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562c19324/5a5afe302efa4f78a8c76b85b9aebfec/FLAGd0db0bb14 [2021-12-14 14:47:35,741 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:47:35,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c [2021-12-14 14:47:35,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562c19324/5a5afe302efa4f78a8c76b85b9aebfec/FLAGd0db0bb14 [2021-12-14 14:47:35,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562c19324/5a5afe302efa4f78a8c76b85b9aebfec [2021-12-14 14:47:35,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:47:35,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:47:35,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:47:35,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:47:35,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:47:35,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4661f312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35, skipping insertion in model container [2021-12-14 14:47:35,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:47:35,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:47:35,921 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c[840,853] [2021-12-14 14:47:35,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:47:35,930 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:47:35,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c[840,853] [2021-12-14 14:47:35,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:47:35,953 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:47:35,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35 WrapperNode [2021-12-14 14:47:35,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:47:35,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:47:35,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:47:35,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:47:35,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,975 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2021-12-14 14:47:35,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:47:35,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:47:35,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:47:35,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:47:35,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:35,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:47:36,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:47:36,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:47:36,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:47:36,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (1/1) ... [2021-12-14 14:47:36,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:47:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:36,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 14:47:36,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 14:47:36,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:47:36,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:47:36,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:47:36,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:47:36,051 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-12-14 14:47:36,051 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-12-14 14:47:36,092 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:47:36,093 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:47:36,206 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:47:36,210 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:47:36,210 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 14:47:36,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:47:36 BoogieIcfgContainer [2021-12-14 14:47:36,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:47:36,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:47:36,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:47:36,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:47:36,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:47:35" (1/3) ... [2021-12-14 14:47:36,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c656a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:47:36, skipping insertion in model container [2021-12-14 14:47:36,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:47:35" (2/3) ... [2021-12-14 14:47:36,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c656a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:47:36, skipping insertion in model container [2021-12-14 14:47:36,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:47:36" (3/3) ... [2021-12-14 14:47:36,231 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2021-12-14 14:47:36,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:47:36,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:47:36,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:47:36,294 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 14:47:36,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:47:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:47:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 14:47:36,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:36,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:36,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:36,320 INFO L85 PathProgramCache]: Analyzing trace with hash -100249854, now seen corresponding path program 1 times [2021-12-14 14:47:36,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:36,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471754466] [2021-12-14 14:47:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:36,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:47:36,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:36,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471754466] [2021-12-14 14:47:36,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471754466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:47:36,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:47:36,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:47:36,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207839224] [2021-12-14 14:47:36,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:47:36,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:47:36,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:47:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:47:36,553 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) 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) [2021-12-14 14:47:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:36,621 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-12-14 14:47:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:47:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 [2021-12-14 14:47:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:36,629 INFO L225 Difference]: With dead ends: 32 [2021-12-14 14:47:36,630 INFO L226 Difference]: Without dead ends: 19 [2021-12-14 14:47:36,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:47:36,635 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:36,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:47:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-14 14:47:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-14 14:47:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 14:47:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-14 14:47:36,666 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-12-14 14:47:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:36,667 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-14 14:47:36,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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) [2021-12-14 14:47:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-14 14:47:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 14:47:36,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:36,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:36,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:47:36,670 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2083914533, now seen corresponding path program 1 times [2021-12-14 14:47:36,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:36,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690122920] [2021-12-14 14:47:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:36,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:47:36,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690122920] [2021-12-14 14:47:36,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690122920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:47:36,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:47:36,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:47:36,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029433271] [2021-12-14 14:47:36,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:47:36,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:47:36,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:47:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:47:36,751 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 14:47:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:36,777 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-12-14 14:47:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:47:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-14 14:47:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:36,779 INFO L225 Difference]: With dead ends: 29 [2021-12-14 14:47:36,779 INFO L226 Difference]: Without dead ends: 21 [2021-12-14 14:47:36,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:47:36,783 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:36,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:47:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-14 14:47:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-12-14 14:47:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 14:47:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-14 14:47:36,793 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-12-14 14:47:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:36,796 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-14 14:47:36,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 14:47:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-14 14:47:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 14:47:36,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:36,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:36,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:47:36,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1402250658, now seen corresponding path program 1 times [2021-12-14 14:47:36,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490948918] [2021-12-14 14:47:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:36,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:47:36,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:36,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490948918] [2021-12-14 14:47:36,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490948918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311923542] [2021-12-14 14:47:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:36,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:36,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:36,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:47:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 14:47:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:47:37,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:47:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 14:47:37,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311923542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:47:37,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:47:37,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2021-12-14 14:47:37,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782690304] [2021-12-14 14:47:37,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:47:37,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 14:47:37,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 14:47:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:47:37,177 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 14:47:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:37,281 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-12-14 14:47:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 14:47:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2021-12-14 14:47:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:37,282 INFO L225 Difference]: With dead ends: 54 [2021-12-14 14:47:37,283 INFO L226 Difference]: Without dead ends: 34 [2021-12-14 14:47:37,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:47:37,284 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:37,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:47:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-14 14:47:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-14 14:47:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 14:47:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-14 14:47:37,296 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2021-12-14 14:47:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:37,296 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-14 14:47:37,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 14:47:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-14 14:47:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 14:47:37,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:37,298 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:37,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 14:47:37,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:37,499 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1901242716, now seen corresponding path program 2 times [2021-12-14 14:47:37,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:37,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947863696] [2021-12-14 14:47:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:37,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:37,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:37,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:37,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:37,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 14:47:37,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947863696] [2021-12-14 14:47:37,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947863696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462424744] [2021-12-14 14:47:37,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 14:47:37,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:37,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:37,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:37,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:47:37,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 14:47:37,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:47:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 14:47:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 14:47:37,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:47:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 14:47:38,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462424744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:47:38,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:47:38,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 16 [2021-12-14 14:47:38,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616330154] [2021-12-14 14:47:38,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:47:38,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 14:47:38,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:38,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 14:47:38,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:47:38,230 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-14 14:47:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:38,361 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-12-14 14:47:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 14:47:38,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 31 [2021-12-14 14:47:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:38,367 INFO L225 Difference]: With dead ends: 46 [2021-12-14 14:47:38,367 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 14:47:38,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-12-14 14:47:38,370 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:38,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:47:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 14:47:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-12-14 14:47:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 14:47:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-12-14 14:47:38,380 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 31 [2021-12-14 14:47:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:38,380 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-12-14 14:47:38,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-14 14:47:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-12-14 14:47:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 14:47:38,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:38,381 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:38,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 14:47:38,591 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,SelfDestructingSolverStorable3 [2021-12-14 14:47:38,592 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2146751834, now seen corresponding path program 3 times [2021-12-14 14:47:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396862602] [2021-12-14 14:47:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:38,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:38,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:38,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:38,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:38,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:38,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-14 14:47:38,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396862602] [2021-12-14 14:47:38,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396862602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654379816] [2021-12-14 14:47:38,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 14:47:38,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:38,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:38,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:47:38,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-14 14:47:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:47:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 14:47:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-14 14:47:38,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:47:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 14:47:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654379816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:47:39,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:47:39,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 20 [2021-12-14 14:47:39,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720712014] [2021-12-14 14:47:39,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:47:39,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 14:47:39,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:39,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 14:47:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-12-14 14:47:39,774 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-14 14:47:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:39,899 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-14 14:47:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:47:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 45 [2021-12-14 14:47:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:39,901 INFO L225 Difference]: With dead ends: 52 [2021-12-14 14:47:39,901 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 14:47:39,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-12-14 14:47:39,902 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:39,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 78 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:47:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 14:47:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-12-14 14:47:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (12), 9 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 14:47:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-14 14:47:39,908 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 45 [2021-12-14 14:47:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:39,908 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-14 14:47:39,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-14 14:47:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-14 14:47:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 14:47:39,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:39,910 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:39,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 14:47:40,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:40,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:40,124 INFO L85 PathProgramCache]: Analyzing trace with hash -489684568, now seen corresponding path program 4 times [2021-12-14 14:47:40,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:40,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772122854] [2021-12-14 14:47:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:40,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-14 14:47:40,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772122854] [2021-12-14 14:47:40,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772122854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358683396] [2021-12-14 14:47:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 14:47:40,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:40,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:40,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 14:47:40,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 14:47:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:47:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 14:47:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-14 14:47:40,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:47:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 14:47:41,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358683396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:47:41,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:47:41,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 24 [2021-12-14 14:47:41,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273213520] [2021-12-14 14:47:41,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:47:41,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 14:47:41,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 14:47:41,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-12-14 14:47:41,983 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-14 14:47:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:42,164 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-12-14 14:47:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 14:47:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 59 [2021-12-14 14:47:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:42,165 INFO L225 Difference]: With dead ends: 58 [2021-12-14 14:47:42,165 INFO L226 Difference]: Without dead ends: 52 [2021-12-14 14:47:42,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=749, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 14:47:42,167 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 163 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:42,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 99 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:47:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-14 14:47:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-12-14 14:47:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-14 14:47:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-14 14:47:42,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 59 [2021-12-14 14:47:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:42,172 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-14 14:47:42,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-14 14:47:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-14 14:47:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 14:47:42,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:42,173 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:42,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 14:47:42,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:42,387 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1199719510, now seen corresponding path program 5 times [2021-12-14 14:47:42,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:42,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781423378] [2021-12-14 14:47:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:42,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-14 14:47:42,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:42,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781423378] [2021-12-14 14:47:42,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781423378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:42,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726792008] [2021-12-14 14:47:42,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 14:47:42,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:42,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:42,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 14:47:42,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-14 14:47:42,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:47:42,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 14:47:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-14 14:47:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:47:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 14:47:45,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726792008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:47:45,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:47:45,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 28 [2021-12-14 14:47:45,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213102922] [2021-12-14 14:47:45,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:47:45,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 14:47:45,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 14:47:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-12-14 14:47:45,516 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2021-12-14 14:47:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:45,679 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-12-14 14:47:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 14:47:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) Word has length 73 [2021-12-14 14:47:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:45,681 INFO L225 Difference]: With dead ends: 64 [2021-12-14 14:47:45,681 INFO L226 Difference]: Without dead ends: 58 [2021-12-14 14:47:45,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 14:47:45,682 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 184 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:45,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 104 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:47:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-14 14:47:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-12-14 14:47:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (16), 13 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-14 14:47:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-12-14 14:47:45,687 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 73 [2021-12-14 14:47:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:45,687 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-12-14 14:47:45,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2021-12-14 14:47:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-12-14 14:47:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 14:47:45,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:45,689 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:45,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 14:47:45,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:45,904 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:45,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1560921940, now seen corresponding path program 6 times [2021-12-14 14:47:45,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:45,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006023154] [2021-12-14 14:47:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:45,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:45,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:45,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:45,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-14 14:47:46,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:46,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006023154] [2021-12-14 14:47:46,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006023154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:46,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376972828] [2021-12-14 14:47:46,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 14:47:46,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:46,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:46,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:46,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 14:47:46,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-14 14:47:46,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:47:46,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 14:47:46,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-14 14:47:46,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:47:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 14:47:50,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376972828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:47:50,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:47:50,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 32 [2021-12-14 14:47:50,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120372543] [2021-12-14 14:47:50,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:47:50,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 14:47:50,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 14:47:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-12-14 14:47:50,530 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2021-12-14 14:47:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:50,764 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-14 14:47:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 14:47:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 87 [2021-12-14 14:47:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:50,767 INFO L225 Difference]: With dead ends: 70 [2021-12-14 14:47:50,767 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 14:47:50,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=689, Invalid=1381, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 14:47:50,771 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 231 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:50,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 120 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:47:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 14:47:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-12-14 14:47:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (18), 15 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-14 14:47:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-12-14 14:47:50,791 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 87 [2021-12-14 14:47:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:50,792 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-12-14 14:47:50,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2021-12-14 14:47:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-12-14 14:47:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:47:50,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:50,797 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:50,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 14:47:51,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:51,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1048271022, now seen corresponding path program 7 times [2021-12-14 14:47:51,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:51,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92471409] [2021-12-14 14:47:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:51,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-14 14:47:51,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92471409] [2021-12-14 14:47:51,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92471409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491279797] [2021-12-14 14:47:51,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 14:47:51,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:51,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:51,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:51,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 14:47:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:51,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-14 14:47:51,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-14 14:47:51,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:47:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-14 14:47:58,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491279797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:47:58,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:47:58,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 36 [2021-12-14 14:47:58,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457599475] [2021-12-14 14:47:58,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:47:58,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 14:47:58,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:47:58,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 14:47:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 14:47:58,045 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2021-12-14 14:47:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:47:58,297 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-12-14 14:47:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 14:47:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) Word has length 101 [2021-12-14 14:47:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:47:58,298 INFO L225 Difference]: With dead ends: 76 [2021-12-14 14:47:58,299 INFO L226 Difference]: Without dead ends: 70 [2021-12-14 14:47:58,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=883, Invalid=1769, Unknown=0, NotChecked=0, Total=2652 [2021-12-14 14:47:58,301 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:47:58,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 135 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:47:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-14 14:47:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-12-14 14:47:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (20), 17 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-14 14:47:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-12-14 14:47:58,315 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 101 [2021-12-14 14:47:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:47:58,315 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-12-14 14:47:58,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2021-12-14 14:47:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-12-14 14:47:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-14 14:47:58,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:47:58,318 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:47:58,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 14:47:58,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:58,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:47:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:47:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2075065264, now seen corresponding path program 8 times [2021-12-14 14:47:58,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:47:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479645886] [2021-12-14 14:47:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:47:58,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:47:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:47:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:47:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:47:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-12-14 14:47:58,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:47:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479645886] [2021-12-14 14:47:58,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479645886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:47:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767902296] [2021-12-14 14:47:58,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 14:47:58,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:47:58,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:47:58,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:47:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 14:47:59,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 14:47:59,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:47:59,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 14:47:59,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:47:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-12-14 14:47:59,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:48:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-14 14:48:09,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767902296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:48:09,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:48:09,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 40 [2021-12-14 14:48:09,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446659318] [2021-12-14 14:48:09,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:48:09,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-14 14:48:09,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:48:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-14 14:48:09,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 14:48:09,045 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2021-12-14 14:48:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:48:09,326 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-12-14 14:48:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 14:48:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) Word has length 115 [2021-12-14 14:48:09,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:48:09,329 INFO L225 Difference]: With dead ends: 82 [2021-12-14 14:48:09,329 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 14:48:09,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1101, Invalid=2205, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 14:48:09,331 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 315 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:48:09,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 148 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:48:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 14:48:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-12-14 14:48:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (22), 19 states have call predecessors, (22), 4 states have call successors, (22) [2021-12-14 14:48:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-12-14 14:48:09,345 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 115 [2021-12-14 14:48:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:48:09,346 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-12-14 14:48:09,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2021-12-14 14:48:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-12-14 14:48:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 14:48:09,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:48:09,348 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:48:09,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 14:48:09,565 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,SelfDestructingSolverStorable9 [2021-12-14 14:48:09,566 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:48:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:48:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -107806286, now seen corresponding path program 9 times [2021-12-14 14:48:09,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:48:09,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259758753] [2021-12-14 14:48:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:48:09,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:48:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:48:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-12-14 14:48:09,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:48:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259758753] [2021-12-14 14:48:09,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259758753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:48:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713788126] [2021-12-14 14:48:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 14:48:09,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:48:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:48:09,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:48:09,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 14:48:10,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-14 14:48:10,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:48:10,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 14:48:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:48:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-12-14 14:48:10,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:48:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-14 14:48:24,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713788126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:48:24,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:48:24,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 44 [2021-12-14 14:48:24,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612700399] [2021-12-14 14:48:24,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:48:24,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-14 14:48:24,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:48:24,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-14 14:48:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 14:48:24,390 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2021-12-14 14:48:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:48:24,693 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-12-14 14:48:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 14:48:24,693 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) Word has length 129 [2021-12-14 14:48:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:48:24,694 INFO L225 Difference]: With dead ends: 88 [2021-12-14 14:48:24,694 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 14:48:24,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1343, Invalid=2689, Unknown=0, NotChecked=0, Total=4032 [2021-12-14 14:48:24,695 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 389 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:48:24,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 174 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:48:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 14:48:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-12-14 14:48:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (24), 21 states have call predecessors, (24), 4 states have call successors, (24) [2021-12-14 14:48:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-12-14 14:48:24,699 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 129 [2021-12-14 14:48:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:48:24,702 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-12-14 14:48:24,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2021-12-14 14:48:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-12-14 14:48:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-14 14:48:24,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:48:24,705 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:48:24,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-14 14:48:24,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:48:24,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:48:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:48:24,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1602833076, now seen corresponding path program 10 times [2021-12-14 14:48:24,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:48:24,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116410870] [2021-12-14 14:48:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:48:24,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:48:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:24,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:48:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:48:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:48:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-12-14 14:48:25,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:48:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116410870] [2021-12-14 14:48:25,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116410870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:48:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930438829] [2021-12-14 14:48:25,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 14:48:25,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:48:25,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:48:25,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:48:25,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 14:48:26,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 14:48:26,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:48:26,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-14 14:48:26,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:48:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-12-14 14:48:26,411 INFO L328 TraceCheckSpWp]: Computing backward predicates...