./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/packet_filter.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/heap-data/packet_filter.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:34:26,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:34:26,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:34:26,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:34:26,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:34:26,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:34:26,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:34:26,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:34:26,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:34:26,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:34:26,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:34:26,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:34:26,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:34:26,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:34:26,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:34:26,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:34:26,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:34:26,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:34:26,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:34:26,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:34:26,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:34:26,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:34:26,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:34:26,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:34:26,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:34:26,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:34:26,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:34:26,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:34:26,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:34:26,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:34:26,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:34:26,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:34:26,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:34:26,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:34:26,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:34:26,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:34:26,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:34:26,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:34:27,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:34:27,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:34:27,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:34:27,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:34:27,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:34:27,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:34:27,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:34:27,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:34:27,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:34:27,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:34:27,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:34:27,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:34:27,035 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:34:27,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:34:27,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:34:27,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:34:27,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:34:27,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:34:27,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:34:27,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:34:27,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:34:27,037 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:34:27,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:34:27,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:34:27,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:34:27,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:34:27,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:34:27,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:34:27,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:34:27,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:34:27,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:34:27,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:34:27,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:34:27,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:34:27,039 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:34:27,039 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:34:27,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:34:27,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:34:27,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f [2021-12-22 10:34:27,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:34:27,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:34:27,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:34:27,278 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:34:27,278 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:34:27,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/packet_filter.i [2021-12-22 10:34:27,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de287de2f/be0a8ed4f6a54eedb066e31b719bfb63/FLAGc1cb6695b [2021-12-22 10:34:27,740 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:34:27,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i [2021-12-22 10:34:27,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de287de2f/be0a8ed4f6a54eedb066e31b719bfb63/FLAGc1cb6695b [2021-12-22 10:34:27,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de287de2f/be0a8ed4f6a54eedb066e31b719bfb63 [2021-12-22 10:34:27,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:34:27,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:34:27,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:34:27,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:34:27,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:34:27,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:34:27" (1/1) ... [2021-12-22 10:34:27,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5039dba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:27, skipping insertion in model container [2021-12-22 10:34:27,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:34:27" (1/1) ... [2021-12-22 10:34:27,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:34:27,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:34:27,997 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/heap-data/packet_filter.i[23925,23938] [2021-12-22 10:34:28,001 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/heap-data/packet_filter.i[24159,24172] [2021-12-22 10:34:28,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:34:28,009 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:34:28,034 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/heap-data/packet_filter.i[23925,23938] [2021-12-22 10:34:28,036 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/heap-data/packet_filter.i[24159,24172] [2021-12-22 10:34:28,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:34:28,061 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:34:28,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28 WrapperNode [2021-12-22 10:34:28,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:34:28,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:34:28,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:34:28,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:34:28,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,108 INFO L137 Inliner]: procedures = 130, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2021-12-22 10:34:28,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:34:28,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:34:28,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:34:28,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:34:28,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:34:28,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:34:28,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:34:28,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:34:28,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (1/1) ... [2021-12-22 10:34:28,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:34:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:34:28,182 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) [2021-12-22 10:34:28,183 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 [2021-12-22 10:34:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 10:34:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 10:34:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 10:34:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:34:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2021-12-22 10:34:28,205 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2021-12-22 10:34:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 10:34:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 10:34:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 10:34:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2021-12-22 10:34:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure send [2021-12-22 10:34:28,205 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2021-12-22 10:34:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:34:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 10:34:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:34:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:34:28,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:34:28,329 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:34:28,336 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:34:28,644 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:34:28,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:34:28,656 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 10:34:28,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:34:28 BoogieIcfgContainer [2021-12-22 10:34:28,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:34:28,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:34:28,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:34:28,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:34:28,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:34:27" (1/3) ... [2021-12-22 10:34:28,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a8113d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:34:28, skipping insertion in model container [2021-12-22 10:34:28,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:34:28" (2/3) ... [2021-12-22 10:34:28,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a8113d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:34:28, skipping insertion in model container [2021-12-22 10:34:28,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:34:28" (3/3) ... [2021-12-22 10:34:28,664 INFO L111 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2021-12-22 10:34:28,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:34:28,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 10:34:28,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:34:28,714 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 [2021-12-22 10:34:28,715 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 10:34:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 39 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 10:34:28,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:28,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:28,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1910004341, now seen corresponding path program 1 times [2021-12-22 10:34:28,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:28,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082488663] [2021-12-22 10:34:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:28,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:28,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082488663] [2021-12-22 10:34:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082488663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:34:28,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:34:28,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:34:28,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252211786] [2021-12-22 10:34:28,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:34:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:34:28,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:34:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:34:28,893 INFO L87 Difference]: Start difference. First operand has 47 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 39 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-22 10:34:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:28,914 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2021-12-22 10:34:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:34:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-12-22 10:34:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:28,924 INFO L225 Difference]: With dead ends: 74 [2021-12-22 10:34:28,925 INFO L226 Difference]: Without dead ends: 43 [2021-12-22 10:34:28,928 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 [2021-12-22 10:34:28,931 INFO L933 BasicCegarLoop]: 58 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, 58 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 [2021-12-22 10:34:28,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:34:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-22 10:34:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-22 10:34:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 35 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-12-22 10:34:28,962 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 8 [2021-12-22 10:34:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:28,963 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-12-22 10:34:28,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-22 10:34:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-12-22 10:34:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 10:34:28,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:28,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:28,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:34:28,965 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1345079117, now seen corresponding path program 1 times [2021-12-22 10:34:28,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:28,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39301980] [2021-12-22 10:34:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:28,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:29,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:29,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39301980] [2021-12-22 10:34:29,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39301980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:34:29,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:34:29,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:34:29,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991352112] [2021-12-22 10:34:29,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:34:29,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:34:29,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:29,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:34:29,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:34:29,069 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-22 10:34:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:29,150 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2021-12-22 10:34:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:34:29,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-12-22 10:34:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:29,154 INFO L225 Difference]: With dead ends: 77 [2021-12-22 10:34:29,154 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 10:34:29,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:34:29,159 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:34:29,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 124 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:34:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 10:34:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2021-12-22 10:34:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 39 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-12-22 10:34:29,173 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 9 [2021-12-22 10:34:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:29,173 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-12-22 10:34:29,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-22 10:34:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-12-22 10:34:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 10:34:29,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:29,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:29,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:34:29,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 124171370, now seen corresponding path program 1 times [2021-12-22 10:34:29,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721583947] [2021-12-22 10:34:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:29,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:29,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721583947] [2021-12-22 10:34:29,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721583947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:34:29,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:34:29,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:34:29,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761389641] [2021-12-22 10:34:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:34:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:34:29,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:34:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:34:29,239 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-12-22 10:34:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:29,303 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-12-22 10:34:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:34:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) Word has length 11 [2021-12-22 10:34:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:29,304 INFO L225 Difference]: With dead ends: 61 [2021-12-22 10:34:29,304 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 10:34:29,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:34:29,309 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:34:29,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 137 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:34:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 10:34:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-22 10:34:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-12-22 10:34:29,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 11 [2021-12-22 10:34:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:29,321 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-12-22 10:34:29,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-12-22 10:34:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-12-22 10:34:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 10:34:29,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:29,322 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:29,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:34:29,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 959773065, now seen corresponding path program 1 times [2021-12-22 10:34:29,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:29,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913496639] [2021-12-22 10:34:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:29,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:29,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913496639] [2021-12-22 10:34:29,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913496639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:34:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137393939] [2021-12-22 10:34:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:29,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:34:29,465 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) [2021-12-22 10:34:29,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:34:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:29,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-22 10:34:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:34:29,616 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:34:29,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 10:34:29,659 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:34:29,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:34:29,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:34:29,682 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:34:29,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:34:29,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:34:29,701 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:34:29,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 10:34:29,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:34:29,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:34:29,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:34:29,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:34:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:29,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:34:29,889 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_84 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_84) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (forall ((v_ArrVal_83 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_83) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) is different from false [2021-12-22 10:34:29,971 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_12| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_7| Int)) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_12| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_7|) 0)) (and (forall ((v_ArrVal_84 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_7| v_ArrVal_84) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (forall ((v_ArrVal_83 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_7| v_ArrVal_83) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))))) is different from false [2021-12-22 10:34:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-22 10:34:30,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137393939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:34:30,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:34:30,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2021-12-22 10:34:30,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462769830] [2021-12-22 10:34:30,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:34:30,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 10:34:30,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 10:34:30,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=21, Unknown=2, NotChecked=18, Total=56 [2021-12-22 10:34:30,033 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-12-22 10:34:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:30,200 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2021-12-22 10:34:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 10:34:30,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 16 [2021-12-22 10:34:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:30,202 INFO L225 Difference]: With dead ends: 90 [2021-12-22 10:34:30,202 INFO L226 Difference]: Without dead ends: 68 [2021-12-22 10:34:30,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=47, Unknown=3, NotChecked=30, Total=110 [2021-12-22 10:34:30,202 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 37 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:34:30,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 216 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2021-12-22 10:34:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-22 10:34:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-12-22 10:34:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2021-12-22 10:34:30,207 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 16 [2021-12-22 10:34:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:30,207 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2021-12-22 10:34:30,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-12-22 10:34:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2021-12-22 10:34:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 10:34:30,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:30,208 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:30,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:34:30,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:30,410 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1116006464, now seen corresponding path program 1 times [2021-12-22 10:34:30,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:30,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74971753] [2021-12-22 10:34:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:30,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:30,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74971753] [2021-12-22 10:34:30,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74971753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:34:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591219635] [2021-12-22 10:34:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:30,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:34:30,511 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) [2021-12-22 10:34:30,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:34:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:30,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 10:34:30,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:34:30,604 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:34:30,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 10:34:30,640 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:34:30,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 10:34:30,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:34:30,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:34:30,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:34:30,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:34:30,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:34:30,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:34:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:30,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:34:30,781 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_152 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_152) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)) (forall ((v_ArrVal_150 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_150) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0))) is different from false [2021-12-22 10:34:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:30,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591219635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:34:30,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:34:30,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2021-12-22 10:34:30,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924472462] [2021-12-22 10:34:30,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:34:30,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 10:34:30,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:30,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 10:34:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=51, Unknown=1, NotChecked=14, Total=90 [2021-12-22 10:34:30,860 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-12-22 10:34:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:31,074 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-12-22 10:34:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 10:34:31,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 18 [2021-12-22 10:34:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:31,075 INFO L225 Difference]: With dead ends: 74 [2021-12-22 10:34:31,076 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 10:34:31,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=89, Unknown=1, NotChecked=20, Total=156 [2021-12-22 10:34:31,076 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:34:31,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 316 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-12-22 10:34:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 10:34:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-12-22 10:34:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-12-22 10:34:31,080 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 18 [2021-12-22 10:34:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:31,080 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-12-22 10:34:31,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-12-22 10:34:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-12-22 10:34:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 10:34:31,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:31,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:31,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:34:31,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:31,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2078493544, now seen corresponding path program 1 times [2021-12-22 10:34:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:31,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843921683] [2021-12-22 10:34:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:31,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:34:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:31,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:31,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843921683] [2021-12-22 10:34:31,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843921683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:34:31,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:34:31,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 10:34:31,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033472759] [2021-12-22 10:34:31,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:34:31,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:34:31,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:34:31,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:34:31,429 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-12-22 10:34:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:31,611 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2021-12-22 10:34:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:34:31,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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 22 [2021-12-22 10:34:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:31,612 INFO L225 Difference]: With dead ends: 132 [2021-12-22 10:34:31,612 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 10:34:31,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:34:31,613 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 35 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:34:31,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 354 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:34:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 10:34:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2021-12-22 10:34:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.28) internal successors, (64), 51 states have internal predecessors, (64), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-12-22 10:34:31,618 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 22 [2021-12-22 10:34:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:31,618 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-12-22 10:34:31,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-12-22 10:34:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-12-22 10:34:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 10:34:31,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:31,620 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:31,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 10:34:31,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash 222329046, now seen corresponding path program 1 times [2021-12-22 10:34:31,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:31,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274594152] [2021-12-22 10:34:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:31,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:34:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:31,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274594152] [2021-12-22 10:34:31,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274594152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:34:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046337082] [2021-12-22 10:34:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:31,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:31,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:34:31,851 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) [2021-12-22 10:34:31,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:34:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:32,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-22 10:34:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:34:32,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 10:34:32,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-12-22 10:34:32,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 45 [2021-12-22 10:34:32,186 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:34:32,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 45 [2021-12-22 10:34:32,218 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:34:32,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:34:32,241 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:34:32,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:34:32,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:34:32,277 INFO L353 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2021-12-22 10:34:32,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 54 [2021-12-22 10:34:32,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:34:32,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:34:32,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 10:34:32,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:34:32,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:34:32,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-22 10:34:32,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-22 10:34:32,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-22 10:34:32,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:34:32,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:34:32,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-22 10:34:32,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2021-12-22 10:34:32,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-22 10:34:32,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:34:32,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-22 10:34:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:32,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:34:32,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:34:32,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 56 [2021-12-22 10:34:32,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:34:32,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 54 [2021-12-22 10:34:32,989 INFO L353 Elim1Store]: treesize reduction 17, result has 70.7 percent of original size [2021-12-22 10:34:32,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 57 [2021-12-22 10:34:32,995 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:34:32,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-12-22 10:34:32,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 10:34:33,111 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-22 10:34:33,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 1 [2021-12-22 10:34:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:33,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046337082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:34:33,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:34:33,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 25 [2021-12-22 10:34:33,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840632924] [2021-12-22 10:34:33,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:34:33,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 10:34:33,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:33,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 10:34:33,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-22 10:34:33,199 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:34:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:33,980 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-12-22 10:34:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 10:34:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-12-22 10:34:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:33,981 INFO L225 Difference]: With dead ends: 149 [2021-12-22 10:34:33,981 INFO L226 Difference]: Without dead ends: 104 [2021-12-22 10:34:33,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 10:34:33,982 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 240 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:34:33,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 503 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:34:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-22 10:34:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2021-12-22 10:34:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.263157894736842) internal successors, (72), 58 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-12-22 10:34:33,987 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 22 [2021-12-22 10:34:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:33,988 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-12-22 10:34:33,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:34:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-12-22 10:34:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 10:34:33,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:33,988 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:34,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:34:34,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:34,197 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:34,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:34,198 INFO L85 PathProgramCache]: Analyzing trace with hash -749095909, now seen corresponding path program 1 times [2021-12-22 10:34:34,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:34,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090422983] [2021-12-22 10:34:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:34,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:34:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:34,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:34:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090422983] [2021-12-22 10:34:34,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090422983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:34:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013193001] [2021-12-22 10:34:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:34,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:34,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:34:34,431 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) [2021-12-22 10:34:34,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:34:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-22 10:34:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:34:34,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-22 10:34:34,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-12-22 10:34:34,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 45 [2021-12-22 10:34:34,736 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:34:34,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 45 [2021-12-22 10:34:34,800 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:34:34,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:34:34,828 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:34:34,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:34:34,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:34:34,869 INFO L353 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2021-12-22 10:34:34,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 54 [2021-12-22 10:34:34,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 10:34:34,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:34:34,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:34:34,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 10:34:35,027 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:34:35,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 51 [2021-12-22 10:34:35,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-22 10:34:35,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:34:35,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:34:35,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:34:35,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-22 10:34:35,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:34:35,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-12-22 10:34:35,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:34:35,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-12-22 10:34:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:35,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:34:35,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:34:35,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 56 [2021-12-22 10:34:35,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:34:35,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 54 [2021-12-22 10:34:35,694 INFO L353 Elim1Store]: treesize reduction 17, result has 70.7 percent of original size [2021-12-22 10:34:35,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 57 [2021-12-22 10:34:35,700 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:34:35,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-12-22 10:34:35,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 10:34:35,788 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-22 10:34:35,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 1 [2021-12-22 10:34:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:34:35,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013193001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:34:35,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:34:35,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 27 [2021-12-22 10:34:35,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871983904] [2021-12-22 10:34:35,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:34:35,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 10:34:35,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:34:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 10:34:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-12-22 10:34:35,916 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 27 states, 24 states have (on average 2.375) internal successors, (57), 26 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:34:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:34:36,782 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-12-22 10:34:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 10:34:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.375) internal successors, (57), 26 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2021-12-22 10:34:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:34:36,783 INFO L225 Difference]: With dead ends: 87 [2021-12-22 10:34:36,783 INFO L226 Difference]: Without dead ends: 85 [2021-12-22 10:34:36,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 10:34:36,784 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 199 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:34:36,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 471 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 555 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2021-12-22 10:34:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-22 10:34:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-12-22 10:34:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 64 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:34:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-12-22 10:34:36,790 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 23 [2021-12-22 10:34:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:34:36,790 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-12-22 10:34:36,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.375) internal successors, (57), 26 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:34:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-12-22 10:34:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 10:34:36,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:34:36,791 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:34:36,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:34:36,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:34:36,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:34:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:34:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1903920603, now seen corresponding path program 1 times [2021-12-22 10:34:36,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:34:36,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914017428] [2021-12-22 10:34:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:34:36,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:34:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:37,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:34:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:34:56,790 WARN L227 SmtUtils]: Spent 9.33s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-22 10:35:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:06,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914017428] [2021-12-22 10:35:06,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914017428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658155474] [2021-12-22 10:35:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:06,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:06,219 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) [2021-12-22 10:35:06,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:35:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-22 10:35:06,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:06,388 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:35:06,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 10:35:06,449 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:06,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:06,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:06,469 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:06,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:06,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:06,503 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-22 10:35:06,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-22 10:35:06,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-12-22 10:35:06,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:06,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:06,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:35:06,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:35:06,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 10:35:06,851 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1219 (Array Int Int)) (v_ArrVal_1218 (Array Int Int)) (v_ArrVal_1215 (Array Int Int)) (v_ArrVal_1214 (Array Int Int)) (v_ArrVal_1213 (Array Int Int)) (v_ArrVal_1223 (Array Int Int)) (|v_append_to_queue_~#p.base_31| Int) (append_to_queue_~node~0.base Int)) (and (= (store (store (store |c_old(#memory_$Pointer$.base)| |v_append_to_queue_~#p.base_31| v_ArrVal_1218) append_to_queue_~node~0.base v_ArrVal_1213) |c_append_to_queue_#in~q.base| v_ArrVal_1219) |c_#memory_$Pointer$.base|) (< append_to_queue_~node~0.base |c_#StackHeapBarrier|) (= (store (store (store |c_old(#memory_$Pointer$.offset)| |v_append_to_queue_~#p.base_31| v_ArrVal_1215) append_to_queue_~node~0.base v_ArrVal_1223) |c_append_to_queue_#in~q.base| v_ArrVal_1214) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |v_append_to_queue_~#p.base_31|) 0))) is different from true [2021-12-22 10:35:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:06,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:06,930 INFO L353 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-22 10:35:06,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 37 [2021-12-22 10:35:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:06,956 INFO L353 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-22 10:35:06,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 37 [2021-12-22 10:35:06,971 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-22 10:35:06,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 10:35:07,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:07,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:07,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:09,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658155474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:09,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:35:09,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-12-22 10:35:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279748950] [2021-12-22 10:35:09,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:09,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 10:35:09,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 10:35:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=136, Unknown=2, NotChecked=24, Total=210 [2021-12-22 10:35:09,315 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:35:11,667 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (@diff |c_old(#memory_$Pointer$.offset)| |c_#memory_$Pointer$.offset|)) (.cse13 (@diff |c_old(#memory_$Pointer$.base)| |c_#memory_$Pointer$.base|))) (let ((.cse6 (store |c_old(#memory_$Pointer$.base)| .cse13 (select |c_#memory_$Pointer$.base| .cse13))) (.cse25 (store |c_old(#memory_$Pointer$.offset)| .cse4 (select |c_#memory_$Pointer$.offset| .cse4)))) (let ((.cse24 (@diff .cse25 |c_#memory_$Pointer$.offset|)) (.cse5 (@diff .cse6 |c_#memory_$Pointer$.base|))) (let ((.cse7 (store .cse6 .cse5 (select |c_#memory_$Pointer$.base| .cse5))) (.cse3 (store .cse25 .cse24 (select |c_#memory_$Pointer$.offset| .cse24)))) (let ((.cse2 (@diff .cse3 |c_#memory_$Pointer$.offset|)) (.cse8 (@diff .cse7 |c_#memory_$Pointer$.base|))) (let ((.cse15 (store .cse7 .cse8 (select |c_#memory_$Pointer$.base| .cse8))) (.cse23 (store .cse3 .cse2 (select |c_#memory_$Pointer$.offset| .cse2)))) (let ((.cse22 (@diff .cse23 |c_#memory_$Pointer$.offset|)) (.cse14 (@diff .cse15 |c_#memory_$Pointer$.base|))) (let ((.cse1 (store .cse15 .cse14 (select |c_#memory_$Pointer$.base| .cse14))) (.cse21 (store .cse23 .cse22 (select |c_#memory_$Pointer$.offset| .cse22)))) (let ((.cse20 (@diff .cse21 |c_#memory_$Pointer$.offset|)) (.cse0 (@diff .cse1 |c_#memory_$Pointer$.base|))) (let ((.cse10 (store .cse1 .cse0 (select |c_#memory_$Pointer$.base| .cse0))) (.cse11 (store .cse21 .cse20 (select |c_#memory_$Pointer$.offset| .cse20)))) (let ((.cse12 (@diff .cse11 |c_#memory_$Pointer$.offset|)) (.cse9 (@diff .cse10 |c_#memory_$Pointer$.base|))) (let ((.cse18 (store .cse10 .cse9 (select |c_#memory_$Pointer$.base| .cse9))) (.cse16 (store .cse11 .cse12 (select |c_#memory_$Pointer$.offset| .cse12)))) (let ((.cse17 (@diff .cse16 |c_#memory_$Pointer$.offset|)) (.cse19 (@diff .cse18 |c_#memory_$Pointer$.base|))) (and (exists ((v_ArrVal_1219 (Array Int Int)) (v_ArrVal_1218 (Array Int Int)) (v_ArrVal_1215 (Array Int Int)) (v_ArrVal_1214 (Array Int Int)) (v_ArrVal_1213 (Array Int Int)) (v_ArrVal_1223 (Array Int Int)) (|v_append_to_queue_~#p.base_31| Int) (append_to_queue_~node~0.base Int)) (and (= (store (store (store |c_old(#memory_$Pointer$.base)| |v_append_to_queue_~#p.base_31| v_ArrVal_1218) append_to_queue_~node~0.base v_ArrVal_1213) |c_append_to_queue_#in~q.base| v_ArrVal_1219) |c_#memory_$Pointer$.base|) (< append_to_queue_~node~0.base |c_#StackHeapBarrier|) (= (store (store (store |c_old(#memory_$Pointer$.offset)| |v_append_to_queue_~#p.base_31| v_ArrVal_1215) append_to_queue_~node~0.base v_ArrVal_1223) |c_append_to_queue_#in~q.base| v_ArrVal_1214) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |v_append_to_queue_~#p.base_31|) 0))) (or (= (select |c_old(#valid)| .cse0) 0) (= .cse0 |c_append_to_queue_#in~q.base|) (= |c_#memory_$Pointer$.base| .cse1) (<= (+ .cse0 1) |c_#StackHeapBarrier|)) (or (<= (+ .cse2 1) |c_#StackHeapBarrier|) (= .cse2 |c_append_to_queue_#in~q.base|) (= |c_#memory_$Pointer$.offset| .cse3) (= (select |c_old(#valid)| .cse2) 0)) (or (= (select |c_old(#valid)| .cse4) 0) (= .cse4 |c_append_to_queue_#in~q.base|) (= |c_#memory_$Pointer$.offset| |c_old(#memory_$Pointer$.offset)|) (<= (+ .cse4 1) |c_#StackHeapBarrier|)) (or (= (select |c_old(#valid)| .cse5) 0) (= |c_#memory_$Pointer$.base| .cse6) (= .cse5 |c_append_to_queue_#in~q.base|) (<= (+ .cse5 1) |c_#StackHeapBarrier|)) (or (= |c_#memory_$Pointer$.base| .cse7) (<= (+ .cse8 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| .cse8) 0) (= .cse8 |c_append_to_queue_#in~q.base|)) (or (= (select |c_old(#valid)| .cse9) 0) (= .cse10 |c_#memory_$Pointer$.base|) (<= (+ .cse9 1) |c_#StackHeapBarrier|) (= .cse9 |c_append_to_queue_#in~q.base|)) (or (= .cse11 |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| .cse12) 0) (<= (+ .cse12 1) |c_#StackHeapBarrier|) (= .cse12 |c_append_to_queue_#in~q.base|)) (or (= |c_#memory_$Pointer$.base| |c_old(#memory_$Pointer$.base)|) (= (select |c_old(#valid)| .cse13) 0) (= .cse13 |c_append_to_queue_#in~q.base|) (<= (+ .cse13 1) |c_#StackHeapBarrier|)) (or (= (select |c_old(#valid)| .cse14) 0) (= |c_#memory_$Pointer$.base| .cse15) (= .cse14 |c_append_to_queue_#in~q.base|) (<= (+ .cse14 1) |c_#StackHeapBarrier|)) (= |c_#memory_$Pointer$.offset| (store .cse16 .cse17 (select |c_#memory_$Pointer$.offset| .cse17))) (or (= (select |c_old(#valid)| .cse17) 0) (= .cse17 |c_append_to_queue_#in~q.base|) (<= (+ .cse17 1) |c_#StackHeapBarrier|) (= .cse16 |c_#memory_$Pointer$.offset|)) (= |c_#memory_$Pointer$.base| (store .cse18 .cse19 (select |c_#memory_$Pointer$.base| .cse19))) (or (= (select |c_old(#valid)| .cse20) 0) (<= (+ .cse20 1) |c_#StackHeapBarrier|) (= .cse21 |c_#memory_$Pointer$.offset|) (= .cse20 |c_append_to_queue_#in~q.base|)) (or (= .cse22 |c_append_to_queue_#in~q.base|) (= |c_#memory_$Pointer$.offset| .cse23) (= (select |c_old(#valid)| .cse22) 0) (<= (+ .cse22 1) |c_#StackHeapBarrier|)) (or (= |c_#memory_$Pointer$.base| .cse18) (<= (+ .cse19 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| .cse19) 0) (= |c_append_to_queue_#in~q.base| .cse19)) (or (= .cse24 |c_append_to_queue_#in~q.base|) (= |c_#memory_$Pointer$.offset| .cse25) (= (select |c_old(#valid)| .cse24) 0) (<= (+ .cse24 1) |c_#StackHeapBarrier|)))))))))))))))) is different from true [2021-12-22 10:35:13,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 10:35:16,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 10:35:18,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 10:35:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:18,623 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2021-12-22 10:35:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 10:35:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-22 10:35:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:18,626 INFO L225 Difference]: With dead ends: 113 [2021-12-22 10:35:18,627 INFO L226 Difference]: Without dead ends: 90 [2021-12-22 10:35:18,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=71, Invalid=206, Unknown=3, NotChecked=62, Total=342 [2021-12-22 10:35:18,627 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 33 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:18,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 221 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 69 Invalid, 3 Unknown, 97 Unchecked, 7.1s Time] [2021-12-22 10:35:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-22 10:35:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2021-12-22 10:35:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 72 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 10:35:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2021-12-22 10:35:18,636 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 23 [2021-12-22 10:35:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:18,636 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2021-12-22 10:35:18,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:35:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2021-12-22 10:35:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 10:35:18,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:18,637 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:18,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:18,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:18,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1306051597, now seen corresponding path program 2 times [2021-12-22 10:35:18,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063424322] [2021-12-22 10:35:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:18,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:35:18,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:18,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063424322] [2021-12-22 10:35:18,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063424322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:18,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500540006] [2021-12-22 10:35:18,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:35:18,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:18,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:18,948 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) [2021-12-22 10:35:18,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 10:35:19,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:35:19,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-22 10:35:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:19,103 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:35:19,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 10:35:19,127 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:19,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:19,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:19,145 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:19,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:19,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:19,180 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-22 10:35:19,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-22 10:35:19,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:19,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:19,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-12-22 10:35:19,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-22 10:35:19,310 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:19,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:19,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:19,328 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 10:35:19,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 10:35:19,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:19,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:19,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:19,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:19,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:35:19,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:19,432 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1378 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_1378) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (forall ((v_ArrVal_1376 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_1376) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) is different from false [2021-12-22 10:35:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-22 10:35:20,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500540006] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:20,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:20,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2021-12-22 10:35:20,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961453942] [2021-12-22 10:35:20,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:20,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 10:35:20,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 10:35:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=115, Unknown=10, NotChecked=24, Total=210 [2021-12-22 10:35:20,513 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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) [2021-12-22 10:35:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:20,679 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2021-12-22 10:35:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:35:20,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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 23 [2021-12-22 10:35:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:20,680 INFO L225 Difference]: With dead ends: 130 [2021-12-22 10:35:20,680 INFO L226 Difference]: Without dead ends: 107 [2021-12-22 10:35:20,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=136, Unknown=10, NotChecked=26, Total=240 [2021-12-22 10:35:20,681 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 31 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:20,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 370 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2021-12-22 10:35:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-22 10:35:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-12-22 10:35:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 82 states have internal predecessors, (105), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 10:35:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2021-12-22 10:35:20,687 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 23 [2021-12-22 10:35:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:20,687 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2021-12-22 10:35:20,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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) [2021-12-22 10:35:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2021-12-22 10:35:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 10:35:20,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:20,694 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:20,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:20,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:20,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1130104883, now seen corresponding path program 1 times [2021-12-22 10:35:20,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256231307] [2021-12-22 10:35:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:20,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:35:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:20,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:20,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256231307] [2021-12-22 10:35:20,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256231307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:20,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:20,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:35:20,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846596436] [2021-12-22 10:35:20,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:20,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:35:20,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:35:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:35:20,987 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-12-22 10:35:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:21,100 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2021-12-22 10:35:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:35:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 24 [2021-12-22 10:35:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:21,101 INFO L225 Difference]: With dead ends: 109 [2021-12-22 10:35:21,101 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 10:35:21,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:35:21,101 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:21,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 182 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:35:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 10:35:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-12-22 10:35:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 81 states have (on average 1.271604938271605) internal successors, (103), 82 states have internal predecessors, (103), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 10:35:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2021-12-22 10:35:21,106 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 24 [2021-12-22 10:35:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:21,106 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2021-12-22 10:35:21,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-12-22 10:35:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2021-12-22 10:35:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 10:35:21,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:21,107 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:21,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 10:35:21,107 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -28321902, now seen corresponding path program 1 times [2021-12-22 10:35:21,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382316969] [2021-12-22 10:35:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:21,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:21,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:35:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:21,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:21,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382316969] [2021-12-22 10:35:21,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382316969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:21,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506606250] [2021-12-22 10:35:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:21,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:21,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:21,284 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) [2021-12-22 10:35:21,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 10:35:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-22 10:35:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:21,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-22 10:35:21,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-12-22 10:35:21,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 45 [2021-12-22 10:35:21,635 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:35:21,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 45 [2021-12-22 10:35:21,669 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:35:21,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:35:21,690 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:35:21,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:35:21,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:21,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:21,730 INFO L353 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2021-12-22 10:35:21,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 54 [2021-12-22 10:35:21,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:21,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 10:35:21,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:21,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-22 10:35:21,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-22 10:35:21,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-22 10:35:21,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-12-22 10:35:21,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:35:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:22,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-22 10:35:22,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:22,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-12-22 10:35:22,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:22,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2021-12-22 10:35:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:22,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:22,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:22,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 97 [2021-12-22 10:35:22,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:22,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 84 [2021-12-22 10:35:22,563 INFO L353 Elim1Store]: treesize reduction 17, result has 70.7 percent of original size [2021-12-22 10:35:22,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 70 [2021-12-22 10:35:22,571 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:35:22,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 44 [2021-12-22 10:35:22,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-22 10:35:22,684 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-22 10:35:22,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 1 [2021-12-22 10:35:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:22,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506606250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:22,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:22,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 24 [2021-12-22 10:35:22,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751273570] [2021-12-22 10:35:22,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:22,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 10:35:22,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 10:35:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-12-22 10:35:22,800 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 24 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:35:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:23,371 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2021-12-22 10:35:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 10:35:23,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-12-22 10:35:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:23,373 INFO L225 Difference]: With dead ends: 116 [2021-12-22 10:35:23,373 INFO L226 Difference]: Without dead ends: 114 [2021-12-22 10:35:23,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-12-22 10:35:23,374 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:23,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 354 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 320 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2021-12-22 10:35:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-22 10:35:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2021-12-22 10:35:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 93 states have internal predecessors, (117), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 10:35:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2021-12-22 10:35:23,383 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 25 [2021-12-22 10:35:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:23,383 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2021-12-22 10:35:23,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:35:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2021-12-22 10:35:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 10:35:23,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:23,384 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:23,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:23,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:23,584 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash -28319980, now seen corresponding path program 1 times [2021-12-22 10:35:23,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433907074] [2021-12-22 10:35:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:23,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:35:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:23,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433907074] [2021-12-22 10:35:23,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433907074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326031688] [2021-12-22 10:35:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:23,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:23,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:23,753 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) [2021-12-22 10:35:23,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 10:35:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:23,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-22 10:35:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:24,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-22 10:35:24,153 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-22 10:35:24,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2021-12-22 10:35:24,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-12-22 10:35:24,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 45 [2021-12-22 10:35:24,203 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:35:24,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 45 [2021-12-22 10:35:24,230 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:35:24,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:35:24,252 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:35:24,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:35:24,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:24,286 INFO L353 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2021-12-22 10:35:24,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 54 [2021-12-22 10:35:24,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:24,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 10:35:24,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:24,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-22 10:35:24,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-22 10:35:24,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:24,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2021-12-22 10:35:24,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2021-12-22 10:35:24,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:24,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:35:24,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-22 10:35:24,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:24,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-22 10:35:24,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:24,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-22 10:35:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:24,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:25,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:25,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 56 [2021-12-22 10:35:25,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:25,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 54 [2021-12-22 10:35:25,084 INFO L353 Elim1Store]: treesize reduction 17, result has 70.7 percent of original size [2021-12-22 10:35:25,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 57 [2021-12-22 10:35:25,091 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:35:25,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-12-22 10:35:25,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 10:35:25,200 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-22 10:35:25,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 1 [2021-12-22 10:35:25,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:25,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 377 treesize of output 371 [2021-12-22 10:35:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:35:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:35:25,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 205 [2021-12-22 10:35:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:25,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326031688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:25,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:25,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2021-12-22 10:35:25,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342798080] [2021-12-22 10:35:25,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:25,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 10:35:25,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 10:35:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-12-22 10:35:25,745 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 32 states, 29 states have (on average 2.103448275862069) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:35:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:26,522 INFO L93 Difference]: Finished difference Result 166 states and 209 transitions. [2021-12-22 10:35:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 10:35:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.103448275862069) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-12-22 10:35:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:26,523 INFO L225 Difference]: With dead ends: 166 [2021-12-22 10:35:26,523 INFO L226 Difference]: Without dead ends: 154 [2021-12-22 10:35:26,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 10:35:26,524 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 97 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:26,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 918 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 582 Invalid, 0 Unknown, 79 Unchecked, 0.6s Time] [2021-12-22 10:35:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-22 10:35:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 118. [2021-12-22 10:35:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 107 states have (on average 1.280373831775701) internal successors, (137), 108 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 10:35:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 151 transitions. [2021-12-22 10:35:26,535 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 151 transitions. Word has length 25 [2021-12-22 10:35:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:26,535 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 151 transitions. [2021-12-22 10:35:26,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.103448275862069) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 10:35:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 151 transitions. [2021-12-22 10:35:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 10:35:26,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:26,537 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:26,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 10:35:26,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 10:35:26,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1025087574, now seen corresponding path program 2 times [2021-12-22 10:35:26,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:26,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783294467] [2021-12-22 10:35:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:26,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:26,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:26,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783294467] [2021-12-22 10:35:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783294467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:26,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251943230] [2021-12-22 10:35:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:35:26,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:26,892 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) [2021-12-22 10:35:26,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 10:35:27,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:35:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 10:35:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:27,073 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:27,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 10:35:27,094 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:27,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:27,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:27,124 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-22 10:35:27,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-22 10:35:27,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:27,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:27,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-12-22 10:35:27,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:27,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-22 10:35:27,259 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:27,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:27,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:27,274 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:35:27,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:35:27,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:27,308 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 10:35:27,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 10:35:27,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:27,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:27,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:27,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:35:27,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:27,411 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)) (forall ((v_ArrVal_2294 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2294) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0))) is different from false [2021-12-22 10:35:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-22 10:35:28,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251943230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:28,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:28,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2021-12-22 10:35:28,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891993995] [2021-12-22 10:35:28,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:28,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 10:35:28,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 10:35:28,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=136, Unknown=8, NotChecked=26, Total=240 [2021-12-22 10:35:28,454 INFO L87 Difference]: Start difference. First operand 118 states and 151 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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) [2021-12-22 10:35:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:28,567 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2021-12-22 10:35:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:35:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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 25 [2021-12-22 10:35:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:28,568 INFO L225 Difference]: With dead ends: 138 [2021-12-22 10:35:28,568 INFO L226 Difference]: Without dead ends: 122 [2021-12-22 10:35:28,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=159, Unknown=8, NotChecked=28, Total=272 [2021-12-22 10:35:28,569 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:28,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 385 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2021-12-22 10:35:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-22 10:35:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-12-22 10:35:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 100 states have internal predecessors, (127), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 10:35:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2021-12-22 10:35:28,579 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 25 [2021-12-22 10:35:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:28,580 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2021-12-22 10:35:28,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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) [2021-12-22 10:35:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2021-12-22 10:35:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 10:35:28,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:28,580 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:28,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-22 10:35:28,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 10:35:28,796 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:28,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1069112326, now seen corresponding path program 1 times [2021-12-22 10:35:28,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:28,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037038298] [2021-12-22 10:35:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:28,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:29,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:35:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:29,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037038298] [2021-12-22 10:35:29,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037038298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306308433] [2021-12-22 10:35:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:29,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:29,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:29,214 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) [2021-12-22 10:35:29,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 10:35:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-22 10:35:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:29,447 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:35:29,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 10:35:29,497 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-22 10:35:29,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-22 10:35:29,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-12-22 10:35:29,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 10:35:29,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 10:35:29,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-12-22 10:35:29,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 45 [2021-12-22 10:35:29,733 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:35:29,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 45 [2021-12-22 10:35:29,755 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:35:29,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:35:29,787 INFO L353 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-22 10:35:29,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2021-12-22 10:35:29,809 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-22 10:35:29,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-22 10:35:29,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:29,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:29,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:35:29,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 10:35:29,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:29,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-22 10:35:29,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-22 10:35:29,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:35:29,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-22 10:35:29,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:30,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:35:30,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2021-12-22 10:35:30,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-12-22 10:35:30,586 INFO L353 Elim1Store]: treesize reduction 266, result has 30.0 percent of original size [2021-12-22 10:35:30,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 133 treesize of output 216 [2021-12-22 10:35:30,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 10:35:30,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-22 10:35:30,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-12-22 10:35:30,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 10:35:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:30,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:30,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-12-22 10:35:30,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-12-22 10:35:31,006 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:35:31,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 10:35:31,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2021-12-22 10:35:31,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:31,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-22 10:35:31,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:31,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2021-12-22 10:35:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:31,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-22 10:35:31,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:35:31,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-22 10:35:31,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:35:31,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-22 10:35:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:31,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:31,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2637 (Array Int Int)) (v_ArrVal_2640 (Array Int Int)) (v_ArrVal_2639 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2637) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2639) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2640) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 4)) 4294967296) 1)) is different from false [2021-12-22 10:35:31,325 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2637 (Array Int Int)) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_44| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_38| Int) (v_ArrVal_2640 (Array Int Int)) (v_ArrVal_2639 (Array Int Int))) (or (not (= 0 (select (store |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_44| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_38|))) (not (< |c_#StackHeapBarrier| |v_ULTIMATE.start_receive_~#packet~0#1.base_38|)) (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_2637) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_2639) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_2640) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 4)) 4294967296) 1))) is different from false [2021-12-22 10:35:31,374 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2637 (Array Int Int)) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_44| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_38| Int) (v_ArrVal_2640 (Array Int Int)) (v_ArrVal_2631 Int) (v_ArrVal_2639 (Array Int Int))) (or (not (< |c_#StackHeapBarrier| |v_ULTIMATE.start_receive_~#packet~0#1.base_38|)) (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_2631) |v_ULTIMATE.start_main_~#new_packet~0#1.base_44| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_38|) 0)) (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_2637) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_2639) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_2640) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 4)) 4294967296) 1))) is different from false [2021-12-22 10:35:31,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:31,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 103 [2021-12-22 10:35:31,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:31,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 101 [2021-12-22 10:35:31,705 INFO L353 Elim1Store]: treesize reduction 17, result has 70.7 percent of original size [2021-12-22 10:35:31,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 104 [2021-12-22 10:35:31,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:35:31,800 INFO L353 Elim1Store]: treesize reduction 78, result has 39.5 percent of original size [2021-12-22 10:35:31,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 462 treesize of output 460 [2021-12-22 10:35:31,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 369 treesize of output 307 [2021-12-22 10:35:31,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 348 [2021-12-22 10:35:31,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:31,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 324 [2021-12-22 10:35:31,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:31,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 258 treesize of output 245 [2021-12-22 10:35:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306308433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:32,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:35:32,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-12-22 10:35:32,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020420866] [2021-12-22 10:35:32,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:32,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 10:35:32,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 10:35:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=887, Unknown=3, NotChecked=186, Total=1190 [2021-12-22 10:35:32,337 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand has 29 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:35:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:35,029 INFO L93 Difference]: Finished difference Result 200 states and 258 transitions. [2021-12-22 10:35:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 10:35:35,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-22 10:35:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:35,031 INFO L225 Difference]: With dead ends: 200 [2021-12-22 10:35:35,031 INFO L226 Difference]: Without dead ends: 177 [2021-12-22 10:35:35,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=360, Invalid=2199, Unknown=3, NotChecked=300, Total=2862 [2021-12-22 10:35:35,032 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 146 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:35,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 739 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1022 Invalid, 0 Unknown, 32 Unchecked, 1.8s Time] [2021-12-22 10:35:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-22 10:35:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 128. [2021-12-22 10:35:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.293103448275862) internal successors, (150), 117 states have internal predecessors, (150), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 10:35:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2021-12-22 10:35:35,042 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 29 [2021-12-22 10:35:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:35,042 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2021-12-22 10:35:35,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:35:35,043 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2021-12-22 10:35:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 10:35:35,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:35,043 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:35,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:35,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 10:35:35,262 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:35,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:35,262 INFO L85 PathProgramCache]: Analyzing trace with hash 8968481, now seen corresponding path program 1 times [2021-12-22 10:35:35,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:35,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592871262] [2021-12-22 10:35:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:35,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:35:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:35,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592871262] [2021-12-22 10:35:35,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592871262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256482087] [2021-12-22 10:35:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:35,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:35,696 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:35,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process