./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 35987657 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-?-3598765 [2022-07-21 02:21:28,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:21:28,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:21:28,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:21:28,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:21:28,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:21:28,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:21:28,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:21:28,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:21:28,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:21:28,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:21:28,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:21:28,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:21:28,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:21:28,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:21:28,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:21:28,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:21:28,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:21:28,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:21:28,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:21:28,115 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:21:28,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:21:28,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:21:28,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:21:28,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:21:28,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:21:28,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:21:28,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:21:28,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:21:28,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:21:28,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:21:28,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:21:28,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:21:28,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:21:28,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:21:28,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:21:28,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:21:28,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:21:28,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:21:28,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:21:28,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:21:28,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:21:28,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:21:28,183 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:21:28,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:21:28,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:21:28,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:21:28,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:21:28,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:21:28,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:21:28,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:21:28,186 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:21:28,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:21:28,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:21:28,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:21:28,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:21:28,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:21:28,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:21:28,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:21:28,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:21:28,187 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:21:28,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:21:28,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:21:28,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:21:28,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:21:28,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:21:28,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:21:28,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:21:28,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:21:28,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:21:28,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:21:28,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:21:28,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:21:28,189 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:21:28,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:21:28,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:21:28,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f [2022-07-21 02:21:28,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:21:28,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:21:28,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:21:28,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:21:28,511 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:21:28,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/packet_filter.i [2022-07-21 02:21:28,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90dd72b04/bff42cd3ade64ef99e0643c5487be04e/FLAG85b134d36 [2022-07-21 02:21:29,003 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:21:29,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i [2022-07-21 02:21:29,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90dd72b04/bff42cd3ade64ef99e0643c5487be04e/FLAG85b134d36 [2022-07-21 02:21:29,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90dd72b04/bff42cd3ade64ef99e0643c5487be04e [2022-07-21 02:21:29,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:21:29,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:21:29,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:21:29,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:21:29,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:21:29,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5572e334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29, skipping insertion in model container [2022-07-21 02:21:29,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:21:29,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:21:29,309 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] [2022-07-21 02:21:29,319 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] [2022-07-21 02:21:29,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:21:29,333 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:21:29,367 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] [2022-07-21 02:21:29,373 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] [2022-07-21 02:21:29,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:21:29,407 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:21:29,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29 WrapperNode [2022-07-21 02:21:29,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:21:29,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:21:29,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:21:29,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:21:29,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,460 INFO L137 Inliner]: procedures = 130, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2022-07-21 02:21:29,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:21:29,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:21:29,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:21:29,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:21:29,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:21:29,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:21:29,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:21:29,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:21:29,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (1/1) ... [2022-07-21 02:21:29,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:21:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:21:29,533 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) [2022-07-21 02:21:29,536 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 [2022-07-21 02:21:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 02:21:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 02:21:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 02:21:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:21:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2022-07-21 02:21:29,565 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2022-07-21 02:21:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 02:21:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 02:21:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 02:21:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2022-07-21 02:21:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure send [2022-07-21 02:21:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2022-07-21 02:21:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 02:21:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 02:21:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:21:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:21:29,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:21:29,653 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:21:29,654 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:21:30,043 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:21:30,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:21:30,051 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 02:21:30,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:21:30 BoogieIcfgContainer [2022-07-21 02:21:30,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:21:30,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:21:30,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:21:30,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:21:30,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:21:29" (1/3) ... [2022-07-21 02:21:30,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6145d12d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:21:30, skipping insertion in model container [2022-07-21 02:21:30,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:21:29" (2/3) ... [2022-07-21 02:21:30,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6145d12d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:21:30, skipping insertion in model container [2022-07-21 02:21:30,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:21:30" (3/3) ... [2022-07-21 02:21:30,058 INFO L111 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2022-07-21 02:21:30,073 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:21:30,074 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 02:21:30,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:21:30,122 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@290a1e80, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@598a5d6d [2022-07-21 02:21:30,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 02:21:30,125 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) [2022-07-21 02:21:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 02:21:30,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:30,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:30,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1910004341, now seen corresponding path program 1 times [2022-07-21 02:21:30,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:30,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804740197] [2022-07-21 02:21:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:30,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:30,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804740197] [2022-07-21 02:21:30,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804740197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:21:30,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:21:30,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:21:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769336993] [2022-07-21 02:21:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:21:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:21:30,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:21:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:21:30,303 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) [2022-07-21 02:21:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:30,324 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-07-21 02:21:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:21:30,326 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 [2022-07-21 02:21:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:30,331 INFO L225 Difference]: With dead ends: 74 [2022-07-21 02:21:30,331 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 02:21:30,334 INFO L412 NwaCegarLoop]: 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 [2022-07-21 02:21:30,338 INFO L413 NwaCegarLoop]: 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 [2022-07-21 02:21:30,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:21:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 02:21:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-21 02:21:30,370 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) [2022-07-21 02:21:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-07-21 02:21:30,374 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 8 [2022-07-21 02:21:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:30,375 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-07-21 02:21:30,376 INFO L496 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) [2022-07-21 02:21:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-07-21 02:21:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 02:21:30,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:30,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:30,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:21:30,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:30,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1345079117, now seen corresponding path program 1 times [2022-07-21 02:21:30,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:30,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390451938] [2022-07-21 02:21:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:30,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:30,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:30,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390451938] [2022-07-21 02:21:30,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390451938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:21:30,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:21:30,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 02:21:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876142296] [2022-07-21 02:21:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:21:30,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:21:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:21:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 02:21:30,462 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) [2022-07-21 02:21:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:30,527 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2022-07-21 02:21:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:21:30,527 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 [2022-07-21 02:21:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:30,529 INFO L225 Difference]: With dead ends: 77 [2022-07-21 02:21:30,529 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 02:21:30,529 INFO L412 NwaCegarLoop]: 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 [2022-07-21 02:21:30,530 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:21:30,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 122 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:21:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 02:21:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2022-07-21 02:21:30,536 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) [2022-07-21 02:21:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-07-21 02:21:30,537 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 9 [2022-07-21 02:21:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:30,537 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-07-21 02:21:30,538 INFO L496 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) [2022-07-21 02:21:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-07-21 02:21:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 02:21:30,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:30,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:30,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:21:30,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 124171370, now seen corresponding path program 1 times [2022-07-21 02:21:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:30,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166275168] [2022-07-21 02:21:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:30,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166275168] [2022-07-21 02:21:30,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166275168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:21:30,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:21:30,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 02:21:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203279158] [2022-07-21 02:21:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:21:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:21:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:21:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 02:21:30,587 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) [2022-07-21 02:21:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:30,667 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-07-21 02:21:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 02:21:30,668 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 [2022-07-21 02:21:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:30,668 INFO L225 Difference]: With dead ends: 61 [2022-07-21 02:21:30,669 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 02:21:30,669 INFO L412 NwaCegarLoop]: 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 [2022-07-21 02:21:30,670 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:21:30,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 136 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:21:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 02:21:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-21 02:21:30,674 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) [2022-07-21 02:21:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-07-21 02:21:30,677 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 11 [2022-07-21 02:21:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:30,677 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-07-21 02:21:30,677 INFO L496 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) [2022-07-21 02:21:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-07-21 02:21:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 02:21:30,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:30,678 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:30,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 02:21:30,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:30,679 INFO L85 PathProgramCache]: Analyzing trace with hash 959773065, now seen corresponding path program 1 times [2022-07-21 02:21:30,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:30,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944932940] [2022-07-21 02:21:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:30,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:30,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:30,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944932940] [2022-07-21 02:21:30,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944932940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:21:30,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940486362] [2022-07-21 02:21:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:30,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:30,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:21:30,866 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) [2022-07-21 02:21:30,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:21:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:30,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 02:21:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:21:31,050 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 02:21:31,051 INFO L390 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 [2022-07-21 02:21:31,116 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:21:31,117 INFO L390 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 [2022-07-21 02:21:31,126 INFO L390 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 [2022-07-21 02:21:31,154 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:21:31,155 INFO L390 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 [2022-07-21 02:21:31,175 INFO L390 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 [2022-07-21 02:21:31,189 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 02:21:31,195 INFO L390 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 [2022-07-21 02:21:31,232 INFO L390 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 [2022-07-21 02:21:31,238 INFO L390 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 [2022-07-21 02:21:31,271 INFO L390 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 [2022-07-21 02:21:31,274 INFO L390 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 [2022-07-21 02:21:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:31,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:21:31,308 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_84 (Array Int Int))) (= (select (select (store |c_#memory_$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 [2022-07-21 02:21:31,371 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_receive_~#packet~0#1.base_6| Int) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_11| Int)) (or (and (forall ((v_ArrVal_84 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_6| v_ArrVal_84) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (forall ((v_ArrVal_83 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_6| v_ArrVal_83) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_11| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_6|) 0)))) is different from false [2022-07-21 02:21:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 02:21:31,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940486362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:21:31,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:21:31,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-07-21 02:21:31,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797005977] [2022-07-21 02:21:31,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:21:31,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:21:31,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:21:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=21, Unknown=2, NotChecked=18, Total=56 [2022-07-21 02:21:31,458 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) [2022-07-21 02:21:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:31,599 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-07-21 02:21:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:21:31,599 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 [2022-07-21 02:21:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:31,600 INFO L225 Difference]: With dead ends: 90 [2022-07-21 02:21:31,600 INFO L226 Difference]: Without dead ends: 68 [2022-07-21 02:21:31,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=47, Unknown=2, NotChecked=30, Total=110 [2022-07-21 02:21:31,601 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 37 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:21:31,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 210 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2022-07-21 02:21:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-21 02:21:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2022-07-21 02:21:31,606 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) [2022-07-21 02:21:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-07-21 02:21:31,607 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 16 [2022-07-21 02:21:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:31,607 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-07-21 02:21:31,607 INFO L496 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) [2022-07-21 02:21:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-07-21 02:21:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 02:21:31,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:31,608 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:31,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:21:31,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:31,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1116006464, now seen corresponding path program 1 times [2022-07-21 02:21:31,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402290469] [2022-07-21 02:21:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:31,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:31,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:31,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402290469] [2022-07-21 02:21:31,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402290469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:21:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815722764] [2022-07-21 02:21:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:31,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:31,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:21:31,923 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) [2022-07-21 02:21:31,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:21:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:32,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 02:21:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:21:32,019 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:21:32,019 INFO L390 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 [2022-07-21 02:21:32,040 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:21:32,040 INFO L390 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 [2022-07-21 02:21:32,044 INFO L390 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 [2022-07-21 02:21:32,053 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 02:21:32,053 INFO L390 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 [2022-07-21 02:21:32,057 INFO L390 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 [2022-07-21 02:21:32,089 INFO L390 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 [2022-07-21 02:21:32,093 INFO L390 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 [2022-07-21 02:21:32,161 INFO L390 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 [2022-07-21 02:21:32,164 INFO L390 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 [2022-07-21 02:21:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:32,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:21:32,202 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_152 (Array Int Int))) (= (select (select (store |c_#memory_$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 [2022-07-21 02:21:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:32,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815722764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:21:32,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:21:32,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-07-21 02:21:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358629969] [2022-07-21 02:21:32,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:21:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 02:21:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 02:21:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=50, Unknown=2, NotChecked=14, Total=90 [2022-07-21 02:21:32,269 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) [2022-07-21 02:21:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:32,474 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2022-07-21 02:21:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:21:32,475 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 [2022-07-21 02:21:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:32,476 INFO L225 Difference]: With dead ends: 74 [2022-07-21 02:21:32,476 INFO L226 Difference]: Without dead ends: 58 [2022-07-21 02:21:32,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=88, Unknown=2, NotChecked=20, Total=156 [2022-07-21 02:21:32,476 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:21:32,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 315 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-07-21 02:21:32,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-21 02:21:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-07-21 02:21:32,480 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) [2022-07-21 02:21:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-07-21 02:21:32,481 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 18 [2022-07-21 02:21:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:32,481 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-07-21 02:21:32,481 INFO L496 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) [2022-07-21 02:21:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-07-21 02:21:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 02:21:32,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:32,482 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:32,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:21:32,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:32,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2078493544, now seen corresponding path program 1 times [2022-07-21 02:21:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:32,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592624527] [2022-07-21 02:21:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:32,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:32,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 02:21:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:32,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592624527] [2022-07-21 02:21:32,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592624527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:21:32,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:21:32,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 02:21:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512458164] [2022-07-21 02:21:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:21:32,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:21:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:21:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:21:32,807 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) [2022-07-21 02:21:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:33,010 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2022-07-21 02:21:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:21:33,010 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 [2022-07-21 02:21:33,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:33,011 INFO L225 Difference]: With dead ends: 132 [2022-07-21 02:21:33,011 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 02:21:33,011 INFO L412 NwaCegarLoop]: 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 [2022-07-21 02:21:33,012 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 35 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-21 02:21:33,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 354 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:21:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 02:21:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2022-07-21 02:21:33,017 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) [2022-07-21 02:21:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-07-21 02:21:33,017 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 22 [2022-07-21 02:21:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:33,018 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-07-21 02:21:33,018 INFO L496 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) [2022-07-21 02:21:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-07-21 02:21:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 02:21:33,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:33,019 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:33,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 02:21:33,019 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:33,019 INFO L85 PathProgramCache]: Analyzing trace with hash 222329046, now seen corresponding path program 1 times [2022-07-21 02:21:33,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:33,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61215901] [2022-07-21 02:21:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:33,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:33,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 02:21:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:33,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:33,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61215901] [2022-07-21 02:21:33,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61215901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:21:33,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176861402] [2022-07-21 02:21:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:33,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:33,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:21:33,235 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) [2022-07-21 02:21:33,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:21:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 02:21:33,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:21:33,433 INFO L390 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 [2022-07-21 02:21:33,518 INFO L356 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-07-21 02:21:33,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2022-07-21 02:21:33,555 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:21:33,555 INFO L390 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 74 [2022-07-21 02:21:33,597 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:21:33,598 INFO L390 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 74 [2022-07-21 02:21:33,606 INFO L390 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 [2022-07-21 02:21:33,639 INFO L356 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2022-07-21 02:21:33,640 INFO L390 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 55 treesize of output 80 [2022-07-21 02:21:33,651 INFO L390 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 [2022-07-21 02:21:33,659 INFO L390 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 [2022-07-21 02:21:33,667 INFO L390 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 [2022-07-21 02:21:33,733 INFO L390 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 [2022-07-21 02:21:33,763 INFO L390 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 [2022-07-21 02:21:33,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 15 [2022-07-21 02:21:33,830 INFO L390 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 [2022-07-21 02:21:33,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 19 [2022-07-21 02:21:33,850 INFO L390 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 [2022-07-21 02:21:34,074 INFO L390 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 [2022-07-21 02:21:34,078 INFO L390 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 [2022-07-21 02:21:34,103 INFO L390 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 [2022-07-21 02:21:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:34,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:21:34,375 INFO L356 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2022-07-21 02:21:34,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2022-07-21 02:21:34,383 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 02:21:34,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2022-07-21 02:21:34,387 INFO L390 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 [2022-07-21 02:21:34,472 INFO L356 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2022-07-21 02:21:34,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2022-07-21 02:21:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:34,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176861402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:21:34,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:21:34,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 25 [2022-07-21 02:21:34,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667684546] [2022-07-21 02:21:34,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:21:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 02:21:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 02:21:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-21 02:21:34,546 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) [2022-07-21 02:21:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:35,233 INFO L93 Difference]: Finished difference Result 187 states and 244 transitions. [2022-07-21 02:21:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 02:21:35,233 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 [2022-07-21 02:21:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:35,235 INFO L225 Difference]: With dead ends: 187 [2022-07-21 02:21:35,236 INFO L226 Difference]: Without dead ends: 142 [2022-07-21 02:21:35,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 02:21:35,237 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 184 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:21:35,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 880 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 572 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-07-21 02:21:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-21 02:21:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 79. [2022-07-21 02:21:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.289855072463768) internal successors, (89), 70 states have internal predecessors, (89), 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) [2022-07-21 02:21:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-07-21 02:21:35,255 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 22 [2022-07-21 02:21:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:35,256 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-07-21 02:21:35,256 INFO L496 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) [2022-07-21 02:21:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-07-21 02:21:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 02:21:35,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:35,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:35,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:21:35,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:35,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash -749095909, now seen corresponding path program 1 times [2022-07-21 02:21:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722526565] [2022-07-21 02:21:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:35,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 02:21:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:21:35,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722526565] [2022-07-21 02:21:35,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722526565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:21:35,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460270492] [2022-07-21 02:21:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:35,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:35,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:21:35,778 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) [2022-07-21 02:21:35,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:21:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 02:21:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:21:36,030 INFO L390 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 [2022-07-21 02:21:36,105 INFO L356 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-07-21 02:21:36,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2022-07-21 02:21:36,132 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:21:36,133 INFO L390 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 74 [2022-07-21 02:21:36,156 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:21:36,156 INFO L390 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 74 [2022-07-21 02:21:36,164 INFO L390 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 [2022-07-21 02:21:36,216 INFO L356 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2022-07-21 02:21:36,217 INFO L390 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 55 treesize of output 80 [2022-07-21 02:21:36,226 INFO L390 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 [2022-07-21 02:21:36,233 INFO L390 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 [2022-07-21 02:21:36,241 INFO L390 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 [2022-07-21 02:21:36,322 INFO L390 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 [2022-07-21 02:21:36,340 INFO L390 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 [2022-07-21 02:21:36,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:21:36,393 INFO L390 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 0 case distinctions, treesize of input 47 treesize of output 5 [2022-07-21 02:21:36,395 INFO L390 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 [2022-07-21 02:21:36,539 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-07-21 02:21:36,539 INFO L390 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 69 [2022-07-21 02:21:36,542 INFO L390 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 57 treesize of output 41 [2022-07-21 02:21:37,133 INFO L390 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 [2022-07-21 02:21:37,184 INFO L390 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 [2022-07-21 02:21:37,569 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 02:21:37,570 INFO L390 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 193 treesize of output 152 [2022-07-21 02:21:37,574 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 02:21:37,574 INFO L390 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 168 treesize of output 148 [2022-07-21 02:21:37,582 INFO L390 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 31 treesize of output 25 [2022-07-21 02:21:37,585 INFO L390 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 7 [2022-07-21 02:21:37,612 INFO L390 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 [2022-07-21 02:21:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:37,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:21:38,046 INFO L356 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2022-07-21 02:21:38,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2022-07-21 02:21:38,053 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 02:21:38,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2022-07-21 02:21:38,058 INFO L390 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 [2022-07-21 02:21:38,149 INFO L356 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2022-07-21 02:21:38,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2022-07-21 02:21:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:21:38,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460270492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:21:38,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:21:38,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-07-21 02:21:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667780499] [2022-07-21 02:21:38,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:21:38,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 02:21:38,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:21:38,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 02:21:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=644, Unknown=2, NotChecked=0, Total=756 [2022-07-21 02:21:38,273 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 27 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) [2022-07-21 02:21:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:21:39,032 INFO L93 Difference]: Finished difference Result 125 states and 161 transitions. [2022-07-21 02:21:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 02:21:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 27 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 [2022-07-21 02:21:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:21:39,034 INFO L225 Difference]: With dead ends: 125 [2022-07-21 02:21:39,034 INFO L226 Difference]: Without dead ends: 123 [2022-07-21 02:21:39,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1208, Unknown=5, NotChecked=0, Total=1406 [2022-07-21 02:21:39,035 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 71 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:21:39,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 881 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 410 Invalid, 0 Unknown, 160 Unchecked, 0.4s Time] [2022-07-21 02:21:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-21 02:21:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2022-07-21 02:21:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 79 states have internal predecessors, (102), 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) [2022-07-21 02:21:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2022-07-21 02:21:39,047 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 23 [2022-07-21 02:21:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:21:39,048 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2022-07-21 02:21:39,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 27 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) [2022-07-21 02:21:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2022-07-21 02:21:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 02:21:39,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:21:39,050 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:21:39,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:21:39,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:21:39,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:21:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:21:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1903920603, now seen corresponding path program 1 times [2022-07-21 02:21:39,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:21:39,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129237479] [2022-07-21 02:21:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:21:39,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:21:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:39,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 02:21:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:21:59,083 WARN L233 SmtUtils]: Spent 8.39s 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) [2022-07-21 02:22:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129237479] [2022-07-21 02:22:10,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129237479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13602948] [2022-07-21 02:22:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:10,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:10,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:22:10,451 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) [2022-07-21 02:22:10,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:22:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 02:22:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:22:10,630 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 02:22:10,630 INFO L390 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 [2022-07-21 02:22:10,694 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-21 02:22:10,695 INFO L390 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 [2022-07-21 02:22:10,704 INFO L390 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 14 treesize of output 16 [2022-07-21 02:22:10,708 INFO L390 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 14 treesize of output 16 [2022-07-21 02:22:10,772 INFO L390 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 [2022-07-21 02:22:10,777 INFO L390 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 [2022-07-21 02:22:10,782 INFO L390 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 [2022-07-21 02:22:10,886 INFO L390 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 [2022-07-21 02:22:10,890 INFO L390 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 [2022-07-21 02:22:10,893 INFO L390 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 [2022-07-21 02:22:11,119 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1219 (Array Int Int)) (v_ArrVal_1218 (Array Int Int)) (v_ArrVal_1215 (Array Int Int)) (v_ArrVal_1214 (Array Int Int)) (v_ArrVal_1213 (Array Int Int)) (v_ArrVal_1223 (Array Int Int)) (|v_append_to_queue_~#p.base_31| Int) (append_to_queue_~node~0.base Int)) (and (= (store (store (store |c_old(#memory_$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 [2022-07-21 02:22:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:11,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:11,164 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-21 02:22:11,165 INFO L390 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 [2022-07-21 02:22:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:11,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:11,190 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-21 02:22:11,191 INFO L390 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 [2022-07-21 02:22:11,206 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 02:22:11,206 INFO L390 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 [2022-07-21 02:22:11,236 INFO L390 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 [2022-07-21 02:22:11,238 INFO L390 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 [2022-07-21 02:22:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:11,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:22:13,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13602948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:13,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:22:13,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-07-21 02:22:13,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344348915] [2022-07-21 02:22:13,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:22:13,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:22:13,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:22:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:22:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=136, Unknown=2, NotChecked=24, Total=210 [2022-07-21 02:22:13,394 INFO L87 Difference]: Start difference. First operand 89 states and 116 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) [2022-07-21 02:22:15,733 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (@diff |c_old(#memory_$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$.offset| .cse25) (= (select |c_old(#valid)| .cse24) 0) (<= (+ .cse24 1) |c_#StackHeapBarrier|)))))))))))))))) is different from true [2022-07-21 02:22:18,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 02:22:21,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 02:22:23,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 02:22:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:22:23,547 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2022-07-21 02:22:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 02:22:23,551 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 [2022-07-21 02:22:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:22:23,552 INFO L225 Difference]: With dead ends: 130 [2022-07-21 02:22:23,552 INFO L226 Difference]: Without dead ends: 107 [2022-07-21 02:22:23,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=71, Invalid=206, Unknown=3, NotChecked=62, Total=342 [2022-07-21 02:22:23,552 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-07-21 02:22:23,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 233 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 3 Unknown, 94 Unchecked, 7.9s Time] [2022-07-21 02:22:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-21 02:22:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2022-07-21 02:22:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.302325581395349) internal successors, (112), 87 states have internal predecessors, (112), 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) [2022-07-21 02:22:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2022-07-21 02:22:23,558 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 23 [2022-07-21 02:22:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:22:23,558 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2022-07-21 02:22:23,558 INFO L496 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) [2022-07-21 02:22:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2022-07-21 02:22:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 02:22:23,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:22:23,564 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:22:23,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 02:22:23,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:23,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:22:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:22:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1306051597, now seen corresponding path program 2 times [2022-07-21 02:22:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:22:23,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588836283] [2022-07-21 02:22:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:23,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:22:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:22:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:23,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588836283] [2022-07-21 02:22:23,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588836283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:23,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044928376] [2022-07-21 02:22:23,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:22:23,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:23,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:22:23,902 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) [2022-07-21 02:22:23,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:22:24,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:22:24,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:22:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 02:22:24,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:22:24,063 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 02:22:24,063 INFO L390 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 [2022-07-21 02:22:24,097 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-21 02:22:24,097 INFO L390 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 [2022-07-21 02:22:24,106 INFO L390 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 [2022-07-21 02:22:24,109 INFO L390 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 [2022-07-21 02:22:24,149 INFO L390 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 [2022-07-21 02:22:24,154 INFO L390 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 [2022-07-21 02:22:24,159 INFO L390 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 [2022-07-21 02:22:24,205 INFO L390 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 [2022-07-21 02:22:24,223 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:22:24,223 INFO L390 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 [2022-07-21 02:22:24,228 INFO L390 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 [2022-07-21 02:22:24,241 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:22:24,241 INFO L390 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 [2022-07-21 02:22:24,246 INFO L390 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 [2022-07-21 02:22:24,263 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-21 02:22:24,263 INFO L390 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 [2022-07-21 02:22:24,278 INFO L390 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 [2022-07-21 02:22:24,280 INFO L390 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 [2022-07-21 02:22:24,301 INFO L390 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 [2022-07-21 02:22:24,302 INFO L390 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 [2022-07-21 02:22:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:22:24,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:22:24,329 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1378 (Array Int Int))) (= (select (select (store |c_#memory_$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 [2022-07-21 02:22:24,558 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1370 Int) (v_ArrVal_1366 (Array Int Int)) (|v_ULTIMATE.start_receive_~#packet~0#1.base_15| Int) (v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1369 Int) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_20| Int)) (let ((.cse0 (store (store |c_#valid| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_1369) |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_1370))) (or (and (forall ((v_ArrVal_1376 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_1365) |v_ULTIMATE.start_receive_~#packet~0#1.base_15| v_ArrVal_1376) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (forall ((v_ArrVal_1378 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_1366) |v_ULTIMATE.start_receive_~#packet~0#1.base_15| v_ArrVal_1378) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) (not (= (select .cse0 |v_ULTIMATE.start_main_~#new_packet~0#1.base_20|) 0)) (not (= (select (store .cse0 |v_ULTIMATE.start_main_~#new_packet~0#1.base_20| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_15|) 0))))) is different from false [2022-07-21 02:22:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 02:22:24,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044928376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:22:24,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:22:24,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2022-07-21 02:22:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686958492] [2022-07-21 02:22:24,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:22:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 02:22:24,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:22:24,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 02:22:24,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=100, Unknown=3, NotChecked=46, Total=210 [2022-07-21 02:22:24,840 INFO L87 Difference]: Start difference. First operand 98 states and 128 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) [2022-07-21 02:22:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:22:24,981 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2022-07-21 02:22:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:22:24,981 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 [2022-07-21 02:22:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:22:24,982 INFO L225 Difference]: With dead ends: 132 [2022-07-21 02:22:24,982 INFO L226 Difference]: Without dead ends: 109 [2022-07-21 02:22:24,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=119, Unknown=3, NotChecked=50, Total=240 [2022-07-21 02:22:24,983 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 46 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:22:24,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 335 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2022-07-21 02:22:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-21 02:22:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2022-07-21 02:22:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.302325581395349) internal successors, (112), 87 states have internal predecessors, (112), 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) [2022-07-21 02:22:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2022-07-21 02:22:24,988 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 23 [2022-07-21 02:22:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:22:24,989 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2022-07-21 02:22:24,989 INFO L496 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) [2022-07-21 02:22:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2022-07-21 02:22:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 02:22:24,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:22:24,989 INFO L195 NwaCegarLoop]: 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] [2022-07-21 02:22:25,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 02:22:25,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:25,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:22:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:22:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1130104883, now seen corresponding path program 1 times [2022-07-21 02:22:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:22:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398557789] [2022-07-21 02:22:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:22:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:25,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 02:22:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:25,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398557789] [2022-07-21 02:22:25,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398557789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:22:25,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:22:25,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 02:22:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912541412] [2022-07-21 02:22:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:22:25,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 02:22:25,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:22:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 02:22:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:22:25,295 INFO L87 Difference]: Start difference. First operand 98 states and 128 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) [2022-07-21 02:22:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:22:25,419 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2022-07-21 02:22:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:22:25,419 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 [2022-07-21 02:22:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:22:25,420 INFO L225 Difference]: With dead ends: 125 [2022-07-21 02:22:25,420 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 02:22:25,420 INFO L412 NwaCegarLoop]: 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 [2022-07-21 02:22:25,421 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:22:25,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 186 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:22:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 02:22:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2022-07-21 02:22:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 92 states have internal predecessors, (116), 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) [2022-07-21 02:22:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-07-21 02:22:25,425 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 24 [2022-07-21 02:22:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:22:25,426 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-07-21 02:22:25,426 INFO L496 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) [2022-07-21 02:22:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-07-21 02:22:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 02:22:25,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:22:25,426 INFO L195 NwaCegarLoop]: 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] [2022-07-21 02:22:25,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 02:22:25,426 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:22:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:22:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash -28321902, now seen corresponding path program 1 times [2022-07-21 02:22:25,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:22:25,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459068881] [2022-07-21 02:22:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:22:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 02:22:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459068881] [2022-07-21 02:22:25,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459068881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027285728] [2022-07-21 02:22:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:22:25,603 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) [2022-07-21 02:22:25,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 02:22:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:25,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 02:22:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:22:25,873 INFO L390 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 [2022-07-21 02:22:25,931 INFO L356 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-07-21 02:22:25,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2022-07-21 02:22:25,963 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:22:25,963 INFO L390 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 74 [2022-07-21 02:22:26,007 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:22:26,007 INFO L390 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 74 [2022-07-21 02:22:26,038 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-21 02:22:26,039 INFO L390 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 43 treesize of output 60 [2022-07-21 02:22:26,050 INFO L390 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 [2022-07-21 02:22:26,060 INFO L390 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 [2022-07-21 02:22:26,071 INFO L390 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 [2022-07-21 02:22:26,081 INFO L390 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 [2022-07-21 02:22:26,203 INFO L390 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 [2022-07-21 02:22:26,215 INFO L390 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 [2022-07-21 02:22:26,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 15 [2022-07-21 02:22:26,268 INFO L390 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 [2022-07-21 02:22:26,313 INFO L356 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-07-21 02:22:26,313 INFO L390 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 1 case distinctions, treesize of input 124 treesize of output 76 [2022-07-21 02:22:26,321 INFO L390 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 43 treesize of output 31 [2022-07-21 02:22:26,359 INFO L356 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-07-21 02:22:26,359 INFO L390 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 1 case distinctions, treesize of input 135 treesize of output 85 [2022-07-21 02:22:26,369 INFO L390 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 52 treesize of output 38 [2022-07-21 02:22:26,703 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 02:22:26,704 INFO L390 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 93 treesize of output 72 [2022-07-21 02:22:26,708 INFO L390 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 67 treesize of output 53 [2022-07-21 02:22:26,713 INFO L390 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 [2022-07-21 02:22:26,718 INFO L390 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 33 treesize of output 27 [2022-07-21 02:22:26,748 INFO L390 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 [2022-07-21 02:22:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:26,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:22:27,017 INFO L356 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2022-07-21 02:22:27,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 92 [2022-07-21 02:22:27,024 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 02:22:27,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 62 [2022-07-21 02:22:27,029 INFO L390 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 [2022-07-21 02:22:27,127 INFO L356 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2022-07-21 02:22:27,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 1 [2022-07-21 02:22:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:27,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027285728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:22:27,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:22:27,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 24 [2022-07-21 02:22:27,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070259907] [2022-07-21 02:22:27,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:22:27,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 02:22:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:22:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 02:22:27,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-07-21 02:22:27,253 INFO L87 Difference]: Start difference. First operand 103 states and 132 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) [2022-07-21 02:22:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:22:27,631 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2022-07-21 02:22:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:22:27,631 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 [2022-07-21 02:22:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:22:27,632 INFO L225 Difference]: With dead ends: 130 [2022-07-21 02:22:27,632 INFO L226 Difference]: Without dead ends: 128 [2022-07-21 02:22:27,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:22:27,633 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 43 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:22:27,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 458 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 223 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2022-07-21 02:22:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-21 02:22:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-07-21 02:22:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.2718446601941749) internal successors, (131), 104 states have internal predecessors, (131), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 02:22:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2022-07-21 02:22:27,642 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 25 [2022-07-21 02:22:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:22:27,644 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2022-07-21 02:22:27,644 INFO L496 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) [2022-07-21 02:22:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2022-07-21 02:22:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 02:22:27,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:22:27,645 INFO L195 NwaCegarLoop]: 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] [2022-07-21 02:22:27,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 02:22:27,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:27,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:22:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:22:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -28319980, now seen corresponding path program 1 times [2022-07-21 02:22:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:22:27,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119004445] [2022-07-21 02:22:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:27,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:22:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 02:22:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:28,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119004445] [2022-07-21 02:22:28,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119004445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636672946] [2022-07-21 02:22:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:28,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:28,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:22:28,014 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) [2022-07-21 02:22:28,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 02:22:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:28,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 02:22:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:22:28,321 INFO L390 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 [2022-07-21 02:22:28,536 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-21 02:22:28,537 INFO L390 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 [2022-07-21 02:22:28,619 INFO L356 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-07-21 02:22:28,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2022-07-21 02:22:28,651 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:22:28,651 INFO L390 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 74 [2022-07-21 02:22:28,682 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:22:28,682 INFO L390 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 74 [2022-07-21 02:22:28,719 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-21 02:22:28,720 INFO L390 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 43 treesize of output 60 [2022-07-21 02:22:28,730 INFO L390 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 [2022-07-21 02:22:28,738 INFO L390 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 [2022-07-21 02:22:28,748 INFO L390 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 [2022-07-21 02:22:28,757 INFO L390 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 [2022-07-21 02:22:28,858 INFO L390 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 [2022-07-21 02:22:28,889 INFO L390 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 [2022-07-21 02:22:28,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 15 [2022-07-21 02:22:28,992 INFO L390 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 [2022-07-21 02:22:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:22:29,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:22:29,027 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2022-07-21 02:22:29,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:29,504 INFO L390 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 24 treesize of output 16 [2022-07-21 02:22:29,507 INFO L390 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 [2022-07-21 02:22:29,509 INFO L390 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 17 treesize of output 13 [2022-07-21 02:22:29,511 INFO L390 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 15 treesize of output 11 [2022-07-21 02:22:29,528 INFO L390 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 [2022-07-21 02:22:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:29,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:22:29,937 INFO L356 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2022-07-21 02:22:29,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2022-07-21 02:22:29,955 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 02:22:29,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2022-07-21 02:22:29,959 INFO L390 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 [2022-07-21 02:22:30,072 INFO L356 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2022-07-21 02:22:30,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2022-07-21 02:22:30,256 INFO L390 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 307 treesize of output 289 [2022-07-21 02:22:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:30,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636672946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:22:30,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:22:30,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2022-07-21 02:22:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780384001] [2022-07-21 02:22:30,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:22:30,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 02:22:30,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:22:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 02:22:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:22:30,916 INFO L87 Difference]: Start difference. First operand 116 states and 149 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) [2022-07-21 02:22:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:22:31,332 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2022-07-21 02:22:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 02:22:31,333 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 [2022-07-21 02:22:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:22:31,334 INFO L225 Difference]: With dead ends: 160 [2022-07-21 02:22:31,334 INFO L226 Difference]: Without dead ends: 148 [2022-07-21 02:22:31,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 02:22:31,335 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 27 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:22:31,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 702 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 203 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-07-21 02:22:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-21 02:22:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2022-07-21 02:22:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 116 states have (on average 1.2672413793103448) internal successors, (147), 117 states have internal predecessors, (147), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 02:22:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 167 transitions. [2022-07-21 02:22:31,342 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 167 transitions. Word has length 25 [2022-07-21 02:22:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:22:31,342 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 167 transitions. [2022-07-21 02:22:31,342 INFO L496 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) [2022-07-21 02:22:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 167 transitions. [2022-07-21 02:22:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 02:22:31,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:22:31,343 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:22:31,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 02:22:31,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 02:22:31,544 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:22:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:22:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1025087574, now seen corresponding path program 2 times [2022-07-21 02:22:31,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:22:31,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626342584] [2022-07-21 02:22:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:31,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:22:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:31,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:31,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626342584] [2022-07-21 02:22:31,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626342584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:31,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981463151] [2022-07-21 02:22:31,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:22:31,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:31,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:22:31,654 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) [2022-07-21 02:22:31,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 02:22:31,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:22:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:22:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 02:22:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:22:31,894 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:22:31,895 INFO L390 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 [2022-07-21 02:22:31,923 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-21 02:22:31,923 INFO L390 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 [2022-07-21 02:22:31,930 INFO L390 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 [2022-07-21 02:22:31,933 INFO L390 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 [2022-07-21 02:22:31,966 INFO L390 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 [2022-07-21 02:22:31,969 INFO L390 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 [2022-07-21 02:22:31,972 INFO L390 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 [2022-07-21 02:22:32,000 INFO L390 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 [2022-07-21 02:22:32,018 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:22:32,018 INFO L390 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 [2022-07-21 02:22:32,022 INFO L390 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 [2022-07-21 02:22:32,033 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:22:32,034 INFO L390 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 [2022-07-21 02:22:32,037 INFO L390 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 [2022-07-21 02:22:32,050 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-21 02:22:32,051 INFO L390 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 [2022-07-21 02:22:32,066 INFO L390 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 [2022-07-21 02:22:32,068 INFO L390 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 [2022-07-21 02:22:32,088 INFO L390 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 [2022-07-21 02:22:32,089 INFO L390 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 [2022-07-21 02:22:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:22:32,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:22:32,120 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_$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 [2022-07-21 02:22:32,394 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_receive_~#packet~0#1.base_23| Int) (v_ArrVal_2285 Int) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_28| Int) (v_ArrVal_2289 Int) (v_ArrVal_2288 (Array Int Int)) (v_ArrVal_2287 (Array Int Int))) (let ((.cse0 (store (store |c_#valid| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2285) |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_2289))) (or (not (= (select .cse0 |v_ULTIMATE.start_main_~#new_packet~0#1.base_28|) 0)) (and (forall ((v_ArrVal_2294 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2287) |v_ULTIMATE.start_receive_~#packet~0#1.base_23| v_ArrVal_2294) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)) (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2288) |v_ULTIMATE.start_receive_~#packet~0#1.base_23| v_ArrVal_2297) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0))) (not (= (select (store .cse0 |v_ULTIMATE.start_main_~#new_packet~0#1.base_28| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_23|) 0))))) is different from false [2022-07-21 02:22:32,501 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2285 Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_23| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_24| Int) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_28| Int) (v_ArrVal_2289 Int) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_29| Int)) (let ((.cse1 (store |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_29| 1))) (let ((.cse0 (store (store .cse1 |v_ULTIMATE.start_receive_~#packet~0#1.base_24| v_ArrVal_2285) |v_ULTIMATE.start_main_~#new_packet~0#1.base_29| v_ArrVal_2289))) (or (not (= (select (store .cse0 |v_ULTIMATE.start_main_~#new_packet~0#1.base_28| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_23|) 0)) (and (forall ((v_ArrVal_2287 (Array Int Int)) (v_ArrVal_2294 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_24| v_ArrVal_2287) |v_ULTIMATE.start_receive_~#packet~0#1.base_23| v_ArrVal_2294) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)) (forall ((v_ArrVal_2288 (Array Int Int)) (v_ArrVal_2297 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_24| v_ArrVal_2288) |v_ULTIMATE.start_receive_~#packet~0#1.base_23| v_ArrVal_2297) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0))) (not (= (select .cse1 |v_ULTIMATE.start_receive_~#packet~0#1.base_24|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_29|) 0)) (not (= (select .cse0 |v_ULTIMATE.start_main_~#new_packet~0#1.base_28|) 0)))))) is different from false [2022-07-21 02:22:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-21 02:22:32,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981463151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:22:32,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:22:32,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2022-07-21 02:22:32,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168626543] [2022-07-21 02:22:32,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:22:32,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 02:22:32,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:22:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 02:22:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=103, Unknown=4, NotChecked=72, Total=240 [2022-07-21 02:22:32,589 INFO L87 Difference]: Start difference. First operand 130 states and 167 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) [2022-07-21 02:22:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:22:32,753 INFO L93 Difference]: Finished difference Result 144 states and 182 transitions. [2022-07-21 02:22:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:22:32,753 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 [2022-07-21 02:22:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:22:32,754 INFO L225 Difference]: With dead ends: 144 [2022-07-21 02:22:32,754 INFO L226 Difference]: Without dead ends: 128 [2022-07-21 02:22:32,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=122, Unknown=4, NotChecked=78, Total=272 [2022-07-21 02:22:32,755 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:22:32,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 385 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2022-07-21 02:22:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-21 02:22:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2022-07-21 02:22:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 108 states have (on average 1.2685185185185186) internal successors, (137), 109 states have internal predecessors, (137), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 02:22:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 157 transitions. [2022-07-21 02:22:32,762 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 157 transitions. Word has length 25 [2022-07-21 02:22:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:22:32,762 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 157 transitions. [2022-07-21 02:22:32,762 INFO L496 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) [2022-07-21 02:22:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 157 transitions. [2022-07-21 02:22:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 02:22:32,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:22:32,763 INFO L195 NwaCegarLoop]: 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] [2022-07-21 02:22:32,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 02:22:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 02:22:32,964 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:22:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:22:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1069112326, now seen corresponding path program 1 times [2022-07-21 02:22:32,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:22:32,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930913437] [2022-07-21 02:22:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:32,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:22:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 02:22:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:33,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:33,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930913437] [2022-07-21 02:22:33,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930913437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:33,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880324077] [2022-07-21 02:22:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:33,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:22:33,436 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) [2022-07-21 02:22:33,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 02:22:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-21 02:22:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:22:33,685 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 02:22:33,686 INFO L390 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 [2022-07-21 02:22:33,736 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-21 02:22:33,737 INFO L390 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 [2022-07-21 02:22:33,788 INFO L390 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 [2022-07-21 02:22:33,888 INFO L390 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 [2022-07-21 02:22:33,925 INFO L390 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 [2022-07-21 02:22:33,979 INFO L356 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-07-21 02:22:33,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2022-07-21 02:22:34,006 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:22:34,006 INFO L390 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 74 [2022-07-21 02:22:34,039 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-21 02:22:34,040 INFO L390 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 43 treesize of output 60 [2022-07-21 02:22:34,049 INFO L390 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 [2022-07-21 02:22:34,077 INFO L356 Elim1Store]: treesize reduction 42, result has 45.5 percent of original size [2022-07-21 02:22:34,077 INFO L390 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 52 treesize of output 114 [2022-07-21 02:22:34,086 INFO L390 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 [2022-07-21 02:22:34,094 INFO L390 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 [2022-07-21 02:22:34,103 INFO L390 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 [2022-07-21 02:22:34,146 INFO L390 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 [2022-07-21 02:22:34,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-21 02:22:34,203 INFO L390 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 [2022-07-21 02:22:34,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 19 [2022-07-21 02:22:34,251 INFO L390 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 [2022-07-21 02:22:34,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:34,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 15 [2022-07-21 02:22:34,294 INFO L390 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 [2022-07-21 02:22:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:35,265 INFO L356 Elim1Store]: treesize reduction 70, result has 38.6 percent of original size [2022-07-21 02:22:35,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 58 [2022-07-21 02:22:35,407 INFO L390 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 [2022-07-21 02:22:35,508 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:22:35,509 INFO L390 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 42 treesize of output 44 [2022-07-21 02:22:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:35,514 INFO L390 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 22 treesize of output 24 [2022-07-21 02:22:35,517 INFO L390 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 30 treesize of output 24 [2022-07-21 02:22:35,559 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 02:22:35,559 INFO L390 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 [2022-07-21 02:22:35,565 INFO L390 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 [2022-07-21 02:22:35,577 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 02:22:35,577 INFO L390 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 [2022-07-21 02:22:35,655 INFO L390 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 [2022-07-21 02:22:35,660 INFO L390 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 [2022-07-21 02:22:35,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:35,666 INFO L390 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 [2022-07-21 02:22:35,743 INFO L390 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 [2022-07-21 02:22:35,746 INFO L390 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 [2022-07-21 02:22:35,780 INFO L390 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 [2022-07-21 02:22:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:35,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:22:35,882 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2637 (Array Int Int)) (v_ArrVal_2640 (Array Int Int)) (v_ArrVal_2639 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_2637) (select (select (store |c_#memory_$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 [2022-07-21 02:22:35,898 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2637 (Array Int Int)) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_32| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_27| Int) (v_ArrVal_2640 (Array Int Int)) (v_ArrVal_2639 (Array Int Int))) (or (not (< |c_#StackHeapBarrier| |v_ULTIMATE.start_receive_~#packet~0#1.base_27|)) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_32| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_27|) 0)) (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_receive_~#packet~0#1.base_27| v_ArrVal_2637) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_27| v_ArrVal_2639) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_27| 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 [2022-07-21 02:22:35,918 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2637 (Array Int Int)) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_32| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_27| Int) (v_ArrVal_2640 (Array Int Int)) (v_ArrVal_2631 Int) (v_ArrVal_2639 (Array Int Int))) (or (not (< |c_#StackHeapBarrier| |v_ULTIMATE.start_receive_~#packet~0#1.base_27|)) (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_2631) |v_ULTIMATE.start_main_~#new_packet~0#1.base_32| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_27|) 0)) (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_receive_~#packet~0#1.base_27| v_ArrVal_2637) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_27| v_ArrVal_2639) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_27| 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 [2022-07-21 02:22:36,286 INFO L356 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2022-07-21 02:22:36,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 104 treesize of output 126 [2022-07-21 02:22:36,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:22:36,445 INFO L356 Elim1Store]: treesize reduction 82, result has 57.5 percent of original size [2022-07-21 02:22:36,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 488 treesize of output 538 [2022-07-21 02:22:36,475 INFO L390 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 482 treesize of output 456 [2022-07-21 02:22:36,494 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:22:36,494 INFO L390 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 388 treesize of output 380 [2022-07-21 02:22:36,504 INFO L390 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 373 treesize of output 307 [2022-07-21 02:22:36,524 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:22:36,524 INFO L390 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 [2022-07-21 02:22:37,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880324077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:37,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:22:37,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-07-21 02:22:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587618255] [2022-07-21 02:22:37,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:22:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 02:22:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:22:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 02:22:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=887, Unknown=3, NotChecked=186, Total=1190 [2022-07-21 02:22:37,588 INFO L87 Difference]: Start difference. First operand 122 states and 157 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) [2022-07-21 02:22:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:22:39,544 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2022-07-21 02:22:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 02:22:39,545 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 [2022-07-21 02:22:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:22:39,546 INFO L225 Difference]: With dead ends: 244 [2022-07-21 02:22:39,546 INFO L226 Difference]: Without dead ends: 182 [2022-07-21 02:22:39,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=360, Invalid=2199, Unknown=3, NotChecked=300, Total=2862 [2022-07-21 02:22:39,547 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 140 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:22:39,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 677 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 937 Invalid, 0 Unknown, 34 Unchecked, 1.0s Time] [2022-07-21 02:22:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-21 02:22:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 134. [2022-07-21 02:22:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 120 states have (on average 1.2833333333333334) internal successors, (154), 121 states have internal predecessors, (154), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 02:22:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2022-07-21 02:22:39,555 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 29 [2022-07-21 02:22:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:22:39,556 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2022-07-21 02:22:39,556 INFO L496 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) [2022-07-21 02:22:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2022-07-21 02:22:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 02:22:39,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:22:39,556 INFO L195 NwaCegarLoop]: 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] [2022-07-21 02:22:39,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 02:22:39,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 02:22:39,767 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:22:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:22:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 8968481, now seen corresponding path program 1 times [2022-07-21 02:22:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:22:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452216548] [2022-07-21 02:22:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:22:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:40,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 02:22:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:22:40,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:22:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452216548] [2022-07-21 02:22:40,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452216548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:22:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768614215] [2022-07-21 02:22:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:22:40,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:22:40,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:22:40,235 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) [2022-07-21 02:22:40,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 02:22:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:22:40,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-21 02:22:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:22:40,510 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 02:22:40,510 INFO L390 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 [2022-07-21 02:22:40,585 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-21 02:22:40,585 INFO L390 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 [2022-07-21 02:22:40,628 INFO L390 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 [2022-07-21 02:22:40,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 12 [2022-07-21 02:22:40,831 INFO L390 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 [2022-07-21 02:22:40,885 INFO L356 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-07-21 02:22:40,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2022-07-21 02:22:40,911 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:22:40,911 INFO L390 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 74 [2022-07-21 02:22:40,918 INFO L390 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 [2022-07-21 02:22:40,944 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-21 02:22:40,944 INFO L390 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 74 [2022-07-21 02:22:40,951 INFO L390 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 [2022-07-21 02:22:40,959 INFO L390 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 [2022-07-21 02:22:40,991 INFO L356 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2022-07-21 02:22:40,991 INFO L390 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 55 treesize of output 80 [2022-07-21 02:22:41,000 INFO L390 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 [2022-07-21 02:22:41,073 INFO L390 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 [2022-07-21 02:22:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:22:41,156 INFO L390 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 0 case distinctions, treesize of input 47 treesize of output 5 [2022-07-21 02:22:41,160 INFO L390 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 [2022-07-21 02:22:41,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:41,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 19 [2022-07-21 02:22:41,208 INFO L390 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 [2022-07-21 02:22:42,304 INFO L356 Elim1Store]: treesize reduction 360, result has 23.2 percent of original size [2022-07-21 02:22:42,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 299 treesize of output 613 [2022-07-21 02:22:42,453 INFO L390 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 203 treesize of output 181 [2022-07-21 02:22:42,467 INFO L390 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 293 treesize of output 263 [2022-07-21 02:22:48,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:22:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:23:14,056 WARN L233 SmtUtils]: Spent 25.17s on a formula simplification. DAG size of input: 366 DAG size of output: 108 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-07-21 02:23:14,057 INFO L356 Elim1Store]: treesize reduction 1885, result has 18.1 percent of original size [2022-07-21 02:23:14,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 10 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 12 new quantified variables, introduced 56 case distinctions, treesize of input 65847 treesize of output 19153