./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/compact.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/compact.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 d10d95a54341c7b47811ab25537e4a8b7826e1d784f7f9e824b4bec58f961228 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:25:08,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:25:08,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:25:08,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:25:08,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:25:08,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:25:08,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:25:08,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:25:08,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:25:08,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:25:08,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:25:08,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:25:08,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:25:08,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:25:08,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:25:08,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:25:08,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:25:08,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:25:08,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:25:08,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:25:08,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:25:08,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:25:08,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:25:08,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:25:09,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:25:09,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:25:09,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:25:09,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:25:09,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:25:09,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:25:09,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:25:09,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:25:09,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:25:09,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:25:09,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:25:09,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:25:09,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:25:09,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:25:09,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:25:09,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:25:09,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:25:09,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:25:09,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:25:09,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:25:09,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:25:09,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:25:09,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:25:09,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:25:09,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:25:09,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:25:09,051 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:25:09,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:25:09,052 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:25:09,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:25:09,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:25:09,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:25:09,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:25:09,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:25:09,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:25:09,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:25:09,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:25:09,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:25:09,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:25:09,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:25:09,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:25:09,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:25:09,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:25:09,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:25:09,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:25:09,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:25:09,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:25:09,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:25:09,058 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:25:09,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:25:09,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:25:09,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:25:09,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10d95a54341c7b47811ab25537e4a8b7826e1d784f7f9e824b4bec58f961228 [2021-12-17 09:25:09,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:25:09,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:25:09,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:25:09,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:25:09,345 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:25:09,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/compact.c [2021-12-17 09:25:09,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3910cbe3a/a05bbde7f44b49498f92fb21fb8cf5cf/FLAG1dade7f13 [2021-12-17 09:25:09,834 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:25:09,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/compact.c [2021-12-17 09:25:09,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3910cbe3a/a05bbde7f44b49498f92fb21fb8cf5cf/FLAG1dade7f13 [2021-12-17 09:25:09,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3910cbe3a/a05bbde7f44b49498f92fb21fb8cf5cf [2021-12-17 09:25:09,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:25:09,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:25:09,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:25:09,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:25:09,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:25:09,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:25:09" (1/1) ... [2021-12-17 09:25:09,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e9b9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:09, skipping insertion in model container [2021-12-17 09:25:09,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:25:09" (1/1) ... [2021-12-17 09:25:09,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:25:09,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:25:10,069 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/loops/compact.c[609,622] [2021-12-17 09:25:10,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:25:10,081 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:25:10,097 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/loops/compact.c[609,622] [2021-12-17 09:25:10,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:25:10,118 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:25:10,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10 WrapperNode [2021-12-17 09:25:10,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:25:10,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:25:10,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:25:10,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:25:10,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,152 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2021-12-17 09:25:10,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:25:10,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:25:10,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:25:10,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:25:10,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:25:10,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:25:10,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:25:10,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:25:10,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (1/1) ... [2021-12-17 09:25:10,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:25:10,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:25:10,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 09:25:10,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 09:25:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 09:25:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:25:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:25:10,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:25:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 09:25:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:25:10,326 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:25:10,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:25:10,419 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:25:10,424 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:25:10,424 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 09:25:10,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:25:10 BoogieIcfgContainer [2021-12-17 09:25:10,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:25:10,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:25:10,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:25:10,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:25:10,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:25:09" (1/3) ... [2021-12-17 09:25:10,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b19bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:25:10, skipping insertion in model container [2021-12-17 09:25:10,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:25:10" (2/3) ... [2021-12-17 09:25:10,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b19bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:25:10, skipping insertion in model container [2021-12-17 09:25:10,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:25:10" (3/3) ... [2021-12-17 09:25:10,433 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.c [2021-12-17 09:25:10,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:25:10,438 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:25:10,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:25:10,478 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 09:25:10,478 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:25:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:25:10,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:25:10,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:25:10,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:25:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:25:10,515 INFO L85 PathProgramCache]: Analyzing trace with hash 889605485, now seen corresponding path program 1 times [2021-12-17 09:25:10,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:25:10,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273831255] [2021-12-17 09:25:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:25:10,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:25:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:25:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:25:10,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:25:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273831255] [2021-12-17 09:25:10,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273831255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:25:10,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:25:10,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:25:10,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343464963] [2021-12-17 09:25:10,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:25:10,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:25:10,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:25:10,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:25:10,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:25:10,741 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:25:10,753 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-12-17 09:25:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:25:10,756 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 09:25:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:25:10,763 INFO L225 Difference]: With dead ends: 22 [2021-12-17 09:25:10,770 INFO L226 Difference]: Without dead ends: 10 [2021-12-17 09:25:10,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:25:10,778 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:25:10,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:25:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-17 09:25:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-17 09:25:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-17 09:25:10,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-17 09:25:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:25:10,806 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-17 09:25:10,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-17 09:25:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:25:10,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:25:10,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:25:10,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:25:10,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:25:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:25:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash 889605144, now seen corresponding path program 1 times [2021-12-17 09:25:10,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:25:10,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291145595] [2021-12-17 09:25:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:25:10,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:25:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:25:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:25:10,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:25:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291145595] [2021-12-17 09:25:10,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291145595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:25:10,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:25:10,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:25:10,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423745625] [2021-12-17 09:25:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:25:10,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:25:10,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:25:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:25:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:25:10,899 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:25:10,936 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-17 09:25:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:25:10,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 09:25:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:25:10,939 INFO L225 Difference]: With dead ends: 21 [2021-12-17 09:25:10,939 INFO L226 Difference]: Without dead ends: 15 [2021-12-17 09:25:10,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:25:10,941 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:25:10,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:25:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-17 09:25:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-12-17 09:25:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-17 09:25:10,948 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2021-12-17 09:25:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:25:10,949 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-17 09:25:10,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-17 09:25:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 09:25:10,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:25:10,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:25:10,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:25:10,950 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:25:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:25:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1566455322, now seen corresponding path program 1 times [2021-12-17 09:25:10,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:25:10,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364139283] [2021-12-17 09:25:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:25:10,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:25:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:25:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:25:11,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:25:11,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364139283] [2021-12-17 09:25:11,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364139283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:25:11,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863842816] [2021-12-17 09:25:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:25:11,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:25:11,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:25:11,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:25:11,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:25:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:25:11,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 09:25:11,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:25:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:25:11,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:25:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:25:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863842816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:25:11,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:25:11,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 09:25:11,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821101922] [2021-12-17 09:25:11,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:25:11,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:25:11,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:25:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:25:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:25:11,249 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:25:11,361 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-12-17 09:25:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 09:25:11,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 09:25:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:25:11,363 INFO L225 Difference]: With dead ends: 34 [2021-12-17 09:25:11,363 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 09:25:11,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-17 09:25:11,367 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:25:11,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:25:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 09:25:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 09:25:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-17 09:25:11,380 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 11 [2021-12-17 09:25:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:25:11,380 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-17 09:25:11,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-17 09:25:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 09:25:11,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:25:11,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 09:25:11,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:25:11,599 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 [2021-12-17 09:25:11,600 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:25:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:25:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash -463491552, now seen corresponding path program 2 times [2021-12-17 09:25:11,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:25:11,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193185756] [2021-12-17 09:25:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:25:11,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:25:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:25:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 09:25:11,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:25:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193185756] [2021-12-17 09:25:11,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193185756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:25:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561101456] [2021-12-17 09:25:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:25:11,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:25:11,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:25:11,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:25:11,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:25:11,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:25:11,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:25:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 09:25:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:25:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:25:11,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:25:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 09:25:12,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561101456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:25:12,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:25:12,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-17 09:25:12,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919397240] [2021-12-17 09:25:12,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:25:12,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:25:12,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:25:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:25:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:25:12,131 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:25:12,506 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-12-17 09:25:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 09:25:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 09:25:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:25:12,508 INFO L225 Difference]: With dead ends: 73 [2021-12-17 09:25:12,508 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 09:25:12,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-12-17 09:25:12,510 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:25:12,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 48 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:25:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 09:25:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-17 09:25:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-12-17 09:25:12,516 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 26 [2021-12-17 09:25:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:25:12,517 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-12-17 09:25:12,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-12-17 09:25:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 09:25:12,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:25:12,518 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-17 09:25:12,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:25:12,727 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 [2021-12-17 09:25:12,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:25:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:25:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash -719637204, now seen corresponding path program 3 times [2021-12-17 09:25:12,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:25:12,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128112718] [2021-12-17 09:25:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:25:12,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:25:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:25:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 09:25:13,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:25:13,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128112718] [2021-12-17 09:25:13,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128112718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:25:13,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605397686] [2021-12-17 09:25:13,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:25:13,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:25:13,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:25:13,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:25:13,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:25:14,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-17 09:25:14,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:25:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 09:25:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:25:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 09:25:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:25:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 09:25:15,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605397686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:25:15,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:25:15,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-17 09:25:15,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241239650] [2021-12-17 09:25:15,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:25:15,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 09:25:15,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:25:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 09:25:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-12-17 09:25:15,146 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:25:19,877 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2021-12-17 09:25:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 09:25:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-17 09:25:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:25:19,880 INFO L225 Difference]: With dead ends: 151 [2021-12-17 09:25:19,881 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 09:25:19,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 09:25:19,882 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 270 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 09:25:19,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 168 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 09:25:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 09:25:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-17 09:25:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-12-17 09:25:19,894 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 56 [2021-12-17 09:25:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:25:19,895 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-12-17 09:25:19,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:25:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-12-17 09:25:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 09:25:19,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:25:19,898 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-17 09:25:19,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 09:25:20,103 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 [2021-12-17 09:25:20,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:25:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:25:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -604959932, now seen corresponding path program 4 times [2021-12-17 09:25:20,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:25:20,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177774650] [2021-12-17 09:25:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:25:20,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:25:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:25:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-17 09:25:20,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:25:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177774650] [2021-12-17 09:25:20,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177774650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:25:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670535513] [2021-12-17 09:25:20,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:25:20,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:25:20,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:25:20,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:25:20,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 09:26:26,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:26:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:26:26,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 09:26:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:26:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-17 09:26:27,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:26:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-17 09:26:28,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670535513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:26:28,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:26:28,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-17 09:26:28,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569302068] [2021-12-17 09:26:28,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:26:28,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 09:26:28,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:26:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 09:26:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 09:26:28,275 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:27:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:27:51,571 INFO L93 Difference]: Finished difference Result 307 states and 356 transitions. [2021-12-17 09:27:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 09:27:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-17 09:27:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:27:51,573 INFO L225 Difference]: With dead ends: 307 [2021-12-17 09:27:51,573 INFO L226 Difference]: Without dead ends: 237 [2021-12-17 09:27:51,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 82.3s TimeCoverageRelationStatistics Valid=1746, Invalid=3222, Unknown=2, NotChecked=0, Total=4970 [2021-12-17 09:27:51,576 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 683 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:27:51,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 615 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 09:27:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-17 09:27:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-12-17 09:27:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:27:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-12-17 09:27:51,592 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 116 [2021-12-17 09:27:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:27:51,592 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-12-17 09:27:51,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:27:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-12-17 09:27:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-17 09:27:51,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:27:51,598 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-12-17 09:27:51,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 09:27:51,815 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 [2021-12-17 09:27:51,816 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:27:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:27:51,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1658529932, now seen corresponding path program 5 times [2021-12-17 09:27:51,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:27:51,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81142652] [2021-12-17 09:27:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:27:51,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:27:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:27:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-17 09:27:53,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:27:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81142652] [2021-12-17 09:27:53,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81142652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:27:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16283715] [2021-12-17 09:27:53,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 09:27:53,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:27:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:27:53,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:27:53,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15