./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array19_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/array-patterns/array19_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:09:59,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:09:59,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:09:59,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:09:59,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:09:59,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:09:59,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:09:59,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:09:59,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:09:59,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:09:59,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:09:59,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:09:59,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:09:59,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:09:59,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:09:59,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:09:59,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:09:59,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:09:59,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:09:59,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:09:59,636 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:09:59,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:09:59,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:09:59,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:09:59,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:09:59,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:09:59,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:09:59,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:09:59,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:09:59,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:09:59,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:09:59,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:09:59,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:09:59,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:09:59,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:09:59,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:09:59,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:09:59,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:09:59,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:09:59,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:09:59,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:09:59,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:09:59,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:09:59,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:09:59,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:09:59,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:09:59,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:09:59,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:09:59,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:09:59,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:09:59,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:09:59,693 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:09:59,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:09:59,694 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:09:59,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:09:59,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:09:59,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:09:59,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:09:59,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:09:59,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:09:59,696 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:09:59,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:09:59,697 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:09:59,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:09:59,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:09:59,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:09:59,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:09:59,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:09:59,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:09:59,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:09:59,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:09:59,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:09:59,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:09:59,699 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:09:59,699 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:09:59,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:09:59,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a [2022-07-19 10:09:59,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:09:59,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:09:59,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:09:59,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:09:59,944 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:09:59,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-19 10:10:00,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a03647eaf/31ac98172f42422399a11a97842d7675/FLAG327f52b84 [2022-07-19 10:10:00,348 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:10:00,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-19 10:10:00,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a03647eaf/31ac98172f42422399a11a97842d7675/FLAG327f52b84 [2022-07-19 10:10:00,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a03647eaf/31ac98172f42422399a11a97842d7675 [2022-07-19 10:10:00,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:10:00,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:10:00,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:10:00,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:10:00,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:10:00,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:00,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34de9e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00, skipping insertion in model container [2022-07-19 10:10:00,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:00,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:10:00,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:10:00,926 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/array-patterns/array19_pattern.c[1442,1455] [2022-07-19 10:10:00,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:10:00,952 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:10:00,962 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/array-patterns/array19_pattern.c[1442,1455] [2022-07-19 10:10:00,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:10:00,982 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:10:00,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00 WrapperNode [2022-07-19 10:10:00,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:10:00,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:10:00,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:10:00,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:10:00,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:00,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,018 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-07-19 10:10:01,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:10:01,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:10:01,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:10:01,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:10:01,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:10:01,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:10:01,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:10:01,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:10:01,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (1/1) ... [2022-07-19 10:10:01,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:10:01,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:10:01,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:10:01,075 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 [2022-07-19 10:10:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:10:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 10:10:01,111 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 10:10:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:10:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:10:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:10:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:10:01,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:10:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:10:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:10:01,164 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:10:01,165 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:10:01,326 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:10:01,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:10:01,331 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 10:10:01,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:10:01 BoogieIcfgContainer [2022-07-19 10:10:01,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:10:01,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:10:01,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:10:01,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:10:01,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:10:00" (1/3) ... [2022-07-19 10:10:01,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6502f1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:10:01, skipping insertion in model container [2022-07-19 10:10:01,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:00" (2/3) ... [2022-07-19 10:10:01,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6502f1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:10:01, skipping insertion in model container [2022-07-19 10:10:01,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:10:01" (3/3) ... [2022-07-19 10:10:01,341 INFO L111 eAbstractionObserver]: Analyzing ICFG array19_pattern.c [2022-07-19 10:10:01,353 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:10:01,354 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:10:01,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:10:01,399 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@3e090c67, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@21a01263 [2022-07-19 10:10:01,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:10:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:01,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 10:10:01,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:01,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:01,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2022-07-19 10:10:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:10:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672918365] [2022-07-19 10:10:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:01,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:10:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:01,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:10:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:10:01,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:10:01,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672918365] [2022-07-19 10:10:01,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672918365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:01,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:01,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:10:01,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755541703] [2022-07-19 10:10:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:10:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:10:01,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:10:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:10:01,579 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-07-19 10:10:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:01,604 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2022-07-19 10:10:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:10:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15 [2022-07-19 10:10:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:01,616 INFO L225 Difference]: With dead ends: 63 [2022-07-19 10:10:01,616 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 10:10:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:10:01,626 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2022-07-19 10:10:01,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:10:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 10:10:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 10:10:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-19 10:10:01,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2022-07-19 10:10:01,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:01,672 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-19 10:10:01,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-07-19 10:10:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-19 10:10:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:10:01,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:01,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:01,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:10:01,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2022-07-19 10:10:01,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:10:01,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604116713] [2022-07-19 10:10:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:01,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:10:01,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:10:01,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753044793] [2022-07-19 10:10:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:01,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:10:01,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:10:01,719 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) [2022-07-19 10:10:01,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:10:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:01,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 10:10:01,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:10:01,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:10:01,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:10:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604116713] [2022-07-19 10:10:01,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:10:01,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753044793] [2022-07-19 10:10:01,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753044793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:01,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:01,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:10:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665319027] [2022-07-19 10:10:01,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:01,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:10:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:10:01,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:10:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:10:01,878 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:01,900 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-07-19 10:10:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:10:01,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-19 10:10:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:01,902 INFO L225 Difference]: With dead ends: 36 [2022-07-19 10:10:01,902 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 10:10:01,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:10:01,904 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:10:01,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:10:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 10:10:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-19 10:10:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 10:10:01,910 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-07-19 10:10:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:01,911 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 10:10:01,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 10:10:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:10:01,913 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:01,913 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:01,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:02,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:10:02,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2022-07-19 10:10:02,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:10:02,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056180660] [2022-07-19 10:10:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:10:02,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:10:02,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929436506] [2022-07-19 10:10:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:02,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:10:02,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:10:02,147 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) [2022-07-19 10:10:02,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:10:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:10:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 10:10:02,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:10:02,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:10:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056180660] [2022-07-19 10:10:02,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:10:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929436506] [2022-07-19 10:10:02,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929436506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:02,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:02,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:10:02,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592934296] [2022-07-19 10:10:02,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:02,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:10:02,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:10:02,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:10:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:10:02,325 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:02,440 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2022-07-19 10:10:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:10:02,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-19 10:10:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:02,444 INFO L225 Difference]: With dead ends: 67 [2022-07-19 10:10:02,444 INFO L226 Difference]: Without dead ends: 42 [2022-07-19 10:10:02,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:10:02,446 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:10:02,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 80 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:10:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-19 10:10:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-07-19 10:10:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-19 10:10:02,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 35 [2022-07-19 10:10:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:02,456 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-19 10:10:02,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-19 10:10:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:10:02,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:02,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:02,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:02,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 10:10:02,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2022-07-19 10:10:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:10:02,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257802032] [2022-07-19 10:10:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:02,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:10:02,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:10:02,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846306258] [2022-07-19 10:10:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:02,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:10:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:10:02,689 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) [2022-07-19 10:10:02,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:10:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:10:02,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:10:02,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:10:02,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:10:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257802032] [2022-07-19 10:10:02,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:10:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846306258] [2022-07-19 10:10:02,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846306258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:02,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:02,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:10:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084713568] [2022-07-19 10:10:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:02,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:10:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:10:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:10:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:10:02,780 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:02,822 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-07-19 10:10:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:10:02,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-07-19 10:10:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:02,823 INFO L225 Difference]: With dead ends: 64 [2022-07-19 10:10:02,823 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 10:10:02,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:10:02,824 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:10:02,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:10:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 10:10:02,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-07-19 10:10:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-19 10:10:02,834 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 38 [2022-07-19 10:10:02,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:02,834 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-19 10:10:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-19 10:10:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 10:10:02,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:02,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:02,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:03,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:10:03,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2022-07-19 10:10:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:10:03,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057112630] [2022-07-19 10:10:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:03,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:10:03,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:10:03,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224457791] [2022-07-19 10:10:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:03,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:10:03,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:10:03,077 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) [2022-07-19 10:10:03,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:10:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:03,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 10:10:03,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:03,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40 [2022-07-19 10:10:03,288 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 [2022-07-19 10:10:03,302 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 [2022-07-19 10:10:03,807 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 316 treesize of output 297 [2022-07-19 10:10:04,581 INFO L356 Elim1Store]: treesize reduction 428, result has 1.2 percent of original size [2022-07-19 10:10:04,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 8 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 308 treesize of output 2651 [2022-07-19 10:10:04,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 10:10:05,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 10:10:05,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 10:10:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:10:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,639 INFO L244 Elim1Store]: Index analysis took 190 ms [2022-07-19 10:10:05,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:10:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057112630] [2022-07-19 10:10:05,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:10:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224457791] [2022-07-19 10:10:05,718 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-19 10:10:05,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:05,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:10:05,919 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.TermVariable cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.TermVariable and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @54e81b21) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.MultiDimensionalSelect.(MultiDimensionalSelect.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.constructNestedStoreUpdateConstraintForOnePosition(ArrayIndexEqualityManager.java:415) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.constructNestedStoreUpdateConstraint(ArrayIndexEqualityManager.java:449) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.constructWriteConstraints2(Elim1Store.java:995) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:314) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:611) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:529) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:269) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-19 10:10:05,922 INFO L158 Benchmark]: Toolchain (without parser) took 5149.60ms. Allocated memory was 90.2MB in the beginning and 142.6MB in the end (delta: 52.4MB). Free memory was 55.6MB in the beginning and 96.4MB in the end (delta: -40.8MB). Peak memory consumption was 50.7MB. Max. memory is 16.1GB. [2022-07-19 10:10:05,923 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory was 49.4MB in the beginning and 49.4MB in the end (delta: 39.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 10:10:05,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.83ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 55.3MB in the beginning and 91.2MB in the end (delta: -35.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 10:10:05,923 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.44ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 89.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 10:10:05,923 INFO L158 Benchmark]: Boogie Preprocessor took 23.32ms. Allocated memory is still 117.4MB. Free memory was 89.0MB in the beginning and 87.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 10:10:05,924 INFO L158 Benchmark]: RCFGBuilder took 289.63ms. Allocated memory is still 117.4MB. Free memory was 87.8MB in the beginning and 75.4MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 10:10:05,924 INFO L158 Benchmark]: TraceAbstraction took 4586.97ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 75.0MB in the beginning and 96.4MB in the end (delta: -21.3MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. [2022-07-19 10:10:05,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory was 49.4MB in the beginning and 49.4MB in the end (delta: 39.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 206.83ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 55.3MB in the beginning and 91.2MB in the end (delta: -35.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.44ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 89.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.32ms. Allocated memory is still 117.4MB. Free memory was 89.0MB in the beginning and 87.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 289.63ms. Allocated memory is still 117.4MB. Free memory was 87.8MB in the beginning and 75.4MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4586.97ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 75.0MB in the beginning and 96.4MB in the end (delta: -21.3MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.TermVariable cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.TermVariable and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @54e81b21) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.TermVariable cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.TermVariable and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @54e81b21): de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.MultiDimensionalSelect.(MultiDimensionalSelect.java:103) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-19 10:10:05,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/array-patterns/array19_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:10:07,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:10:07,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:10:07,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:10:07,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:10:07,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:10:07,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:10:07,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:10:07,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:10:07,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:10:07,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:10:07,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:10:07,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:10:07,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:10:07,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:10:07,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:10:07,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:10:07,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:10:07,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:10:07,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:10:07,900 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:10:07,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:10:07,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:10:07,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:10:07,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:10:07,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:10:07,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:10:07,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:10:07,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:10:07,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:10:07,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:10:07,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:10:07,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:10:07,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:10:07,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:10:07,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:10:07,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:10:07,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:10:07,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:10:07,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:10:07,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:10:07,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:10:07,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-19 10:10:07,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:10:07,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:10:07,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:10:07,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:10:07,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:10:07,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:10:07,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:10:07,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:10:07,959 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:10:07,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:10:07,960 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:10:07,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:10:07,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:10:07,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:10:07,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:10:07,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:10:07,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 10:10:07,962 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 10:10:07,962 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 10:10:07,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:10:07,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:10:07,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:10:07,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:10:07,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:10:07,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:10:07,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:10:07,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:10:07,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:10:07,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:10:07,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:10:07,965 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 10:10:07,965 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 10:10:07,965 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:10:07,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:10:07,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:10:07,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 10:10:07,966 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a [2022-07-19 10:10:08,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:10:08,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:10:08,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:10:08,314 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:10:08,315 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:10:08,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-19 10:10:08,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097532361/448ce6b85c784ae8aa7a858d70e7dff4/FLAGc38615dcf [2022-07-19 10:10:08,803 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:10:08,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-19 10:10:08,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097532361/448ce6b85c784ae8aa7a858d70e7dff4/FLAGc38615dcf [2022-07-19 10:10:08,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097532361/448ce6b85c784ae8aa7a858d70e7dff4 [2022-07-19 10:10:08,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:10:08,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:10:08,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:10:08,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:10:08,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:10:08,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:10:08" (1/1) ... [2022-07-19 10:10:08,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1388884d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:08, skipping insertion in model container [2022-07-19 10:10:08,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:10:08" (1/1) ... [2022-07-19 10:10:08,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:10:08,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:10:09,029 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/array-patterns/array19_pattern.c[1442,1455] [2022-07-19 10:10:09,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:10:09,113 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:10:09,126 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/array-patterns/array19_pattern.c[1442,1455] [2022-07-19 10:10:09,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:10:09,173 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:10:09,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09 WrapperNode [2022-07-19 10:10:09,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:10:09,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:10:09,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:10:09,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:10:09,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,225 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-07-19 10:10:09,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:10:09,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:10:09,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:10:09,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:10:09,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:10:09,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:10:09,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:10:09,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:10:09,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (1/1) ... [2022-07-19 10:10:09,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:10:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:10:09,312 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) [2022-07-19 10:10:09,334 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 [2022-07-19 10:10:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:10:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 10:10:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 10:10:09,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 10:10:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:10:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-19 10:10:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:10:09,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:10:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:10:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-19 10:10:09,428 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:10:09,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:10:09,800 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:10:09,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:10:09,805 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 10:10:09,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:10:09 BoogieIcfgContainer [2022-07-19 10:10:09,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:10:09,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:10:09,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:10:09,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:10:09,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:10:08" (1/3) ... [2022-07-19 10:10:09,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8986ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:10:09, skipping insertion in model container [2022-07-19 10:10:09,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:10:09" (2/3) ... [2022-07-19 10:10:09,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8986ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:10:09, skipping insertion in model container [2022-07-19 10:10:09,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:10:09" (3/3) ... [2022-07-19 10:10:09,819 INFO L111 eAbstractionObserver]: Analyzing ICFG array19_pattern.c [2022-07-19 10:10:09,830 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:10:09,831 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:10:09,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:10:09,892 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@74013697, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@719079c1 [2022-07-19 10:10:09,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:10:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 10:10:09,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:09,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:09,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2022-07-19 10:10:09,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:10:09,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025515010] [2022-07-19 10:10:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:09,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:10:09,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:10:09,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:10:09,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 10:10:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 10:10:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:10:10,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:10:10,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:10:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025515010] [2022-07-19 10:10:10,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025515010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:10,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:10,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:10:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518450068] [2022-07-19 10:10:10,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:10:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:10:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:10:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:10:10,045 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-07-19 10:10:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:10,073 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2022-07-19 10:10:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:10:10,075 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15 [2022-07-19 10:10:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:10,080 INFO L225 Difference]: With dead ends: 63 [2022-07-19 10:10:10,081 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 10:10:10,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:10:10,089 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2022-07-19 10:10:10,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:10:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 10:10:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 10:10:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-19 10:10:10,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2022-07-19 10:10:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:10,127 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-19 10:10:10,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-07-19 10:10:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-19 10:10:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:10:10,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:10,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:10,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:10,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:10:10,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2022-07-19 10:10:10,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:10:10,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118904442] [2022-07-19 10:10:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:10,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:10:10,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:10:10,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:10:10,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-19 10:10:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:10:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:10:10,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:10:10,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:10:10,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118904442] [2022-07-19 10:10:10,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118904442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:10,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:10,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:10:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44176548] [2022-07-19 10:10:10,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:10:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:10:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:10:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:10:10,563 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:10,608 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-07-19 10:10:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:10:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-19 10:10:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:10,610 INFO L225 Difference]: With dead ends: 36 [2022-07-19 10:10:10,610 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 10:10:10,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:10:10,612 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:10:10,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:10:10,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 10:10:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-19 10:10:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 10:10:10,619 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-07-19 10:10:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:10,620 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 10:10:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 10:10:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:10:10,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:10,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:10,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:10,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:10:10,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:10,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:10,834 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2022-07-19 10:10:10,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:10:10,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385291009] [2022-07-19 10:10:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:10,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:10:10,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:10:10,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:10:10,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-19 10:10:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:10,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:10:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:10:11,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:10:11,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:10:11,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385291009] [2022-07-19 10:10:11,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385291009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:11,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:11,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:10:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117095987] [2022-07-19 10:10:11,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:10:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:10:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:10:11,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:10:11,122 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:11,131 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-07-19 10:10:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:10:11,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-19 10:10:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:11,132 INFO L225 Difference]: With dead ends: 61 [2022-07-19 10:10:11,132 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:10:11,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:10:11,134 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:10:11,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 75 Unchecked, 0.0s Time] [2022-07-19 10:10:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:10:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-19 10:10:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-19 10:10:11,141 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 35 [2022-07-19 10:10:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:11,141 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-19 10:10:11,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-19 10:10:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:10:11,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:11,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:11,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:11,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:10:11,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2022-07-19 10:10:11,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:10:11,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331761068] [2022-07-19 10:10:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:11,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:10:11,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:10:11,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:10:11,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-19 10:10:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:10:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:10:11,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:10:11,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:10:11,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331761068] [2022-07-19 10:10:11,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331761068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:10:11,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:10:11,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:10:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712369731] [2022-07-19 10:10:11,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:10:11,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:10:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:10:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:10:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:10:11,625 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:10:11,637 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-07-19 10:10:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:10:11,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-07-19 10:10:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:10:11,639 INFO L225 Difference]: With dead ends: 66 [2022-07-19 10:10:11,640 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 10:10:11,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:10:11,643 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:10:11,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 92 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-07-19 10:10:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 10:10:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-19 10:10:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:10:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-07-19 10:10:11,654 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2022-07-19 10:10:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:10:11,655 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-07-19 10:10:11,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:10:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-07-19 10:10:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 10:10:11,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:10:11,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:10:11,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:10:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:10:11,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:10:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:10:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2022-07-19 10:10:11,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:10:11,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807323320] [2022-07-19 10:10:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:10:11,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:10:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:10:11,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:10:11,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-19 10:10:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:10:12,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 10:10:12,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:10:13,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2022-07-19 10:10:13,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:10:13,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:10:13,992 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 35 treesize of output 15 [2022-07-19 10:10:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:10:14,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:10:15,153 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 59 treesize of output 55 [2022-07-19 10:10:15,164 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 111 treesize of output 107 [2022-07-19 10:11:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 10:11:03,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:11:03,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807323320] [2022-07-19 10:11:03,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807323320] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:11:03,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:11:03,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2022-07-19 10:11:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163911879] [2022-07-19 10:11:03,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:11:03,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 10:11:03,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:11:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 10:11:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 10:11:03,971 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:11:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:11:26,077 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-07-19 10:11:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 10:11:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-07-19 10:11:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:11:26,080 INFO L225 Difference]: With dead ends: 128 [2022-07-19 10:11:26,080 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 10:11:26,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 10:11:26,082 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:11:26,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 429 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 347 Invalid, 0 Unknown, 377 Unchecked, 7.2s Time] [2022-07-19 10:11:26,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 10:11:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2022-07-19 10:11:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:11:26,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2022-07-19 10:11:26,103 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 40 [2022-07-19 10:11:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:11:26,104 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2022-07-19 10:11:26,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:11:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2022-07-19 10:11:26,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:11:26,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:11:26,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:11:26,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-19 10:11:26,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:11:26,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:11:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:11:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1706965193, now seen corresponding path program 2 times [2022-07-19 10:11:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:11:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469350289] [2022-07-19 10:11:26,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:11:26,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:11:26,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:11:26,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:11:26,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-19 10:11:26,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:11:26,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:11:26,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 10:11:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:11:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:11:49,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:11:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 10:11:49,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:11:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469350289] [2022-07-19 10:11:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469350289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:11:49,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:11:49,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2022-07-19 10:11:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099514573] [2022-07-19 10:11:49,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:11:49,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 10:11:49,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:11:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 10:11:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=359, Unknown=6, NotChecked=0, Total=462 [2022-07-19 10:11:49,997 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 22 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:11:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:11:50,384 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2022-07-19 10:11:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 10:11:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-07-19 10:11:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:11:50,387 INFO L225 Difference]: With dead ends: 126 [2022-07-19 10:11:50,387 INFO L226 Difference]: Without dead ends: 122 [2022-07-19 10:11:50,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=103, Invalid=397, Unknown=6, NotChecked=0, Total=506 [2022-07-19 10:11:50,389 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:11:50,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 137 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 63 Unchecked, 0.0s Time] [2022-07-19 10:11:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-19 10:11:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2022-07-19 10:11:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 85 states have internal predecessors, (113), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:11:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2022-07-19 10:11:50,417 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 42 [2022-07-19 10:11:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:11:50,418 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2022-07-19 10:11:50,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:11:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2022-07-19 10:11:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:11:50,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:11:50,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:11:50,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-19 10:11:50,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:11:50,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:11:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:11:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash 460196979, now seen corresponding path program 3 times [2022-07-19 10:11:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:11:50,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232480338] [2022-07-19 10:11:50,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:11:50,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:11:50,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:11:50,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:11:50,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-19 10:11:50,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:11:50,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:11:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 10:11:50,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:11:51,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 28 [2022-07-19 10:11:53,362 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:11:53,362 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 45 treesize of output 45 [2022-07-19 10:11:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 10:11:56,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:11:57,731 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 59 treesize of output 55 [2022-07-19 10:11:57,734 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 111 treesize of output 107 [2022-07-19 10:12:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 10:12:09,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:09,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232480338] [2022-07-19 10:12:09,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232480338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:12:09,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:12:09,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-07-19 10:12:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295118663] [2022-07-19 10:12:09,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:12:09,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 10:12:09,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 10:12:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:12:09,241 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:09,424 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2022-07-19 10:12:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:12:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-07-19 10:12:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:09,426 INFO L225 Difference]: With dead ends: 154 [2022-07-19 10:12:09,426 INFO L226 Difference]: Without dead ends: 150 [2022-07-19 10:12:09,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:12:09,427 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:09,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 189 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-07-19 10:12:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-19 10:12:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2022-07-19 10:12:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 77 states have internal predecessors, (101), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:12:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2022-07-19 10:12:09,455 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 42 [2022-07-19 10:12:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:09,456 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2022-07-19 10:12:09,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2022-07-19 10:12:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:12:09,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:09,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:09,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:09,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:09,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash -126609035, now seen corresponding path program 1 times [2022-07-19 10:12:09,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469163435] [2022-07-19 10:12:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:12:09,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:09,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:09,678 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:09,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-19 10:12:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:12:09,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 10:12:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 10:12:09,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:12:09,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:09,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469163435] [2022-07-19 10:12:09,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469163435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:12:09,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:12:09,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:12:09,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104971924] [2022-07-19 10:12:09,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:12:09,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:12:09,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:12:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:12:09,788 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:12:11,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 10:12:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:12,130 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2022-07-19 10:12:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:12:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-19 10:12:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:12,132 INFO L225 Difference]: With dead ends: 156 [2022-07-19 10:12:12,132 INFO L226 Difference]: Without dead ends: 124 [2022-07-19 10:12:12,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:12:12,133 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:12,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 10:12:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-19 10:12:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2022-07-19 10:12:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 81 states have internal predecessors, (105), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:12:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2022-07-19 10:12:12,150 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 42 [2022-07-19 10:12:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:12,150 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2022-07-19 10:12:12,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:12:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2022-07-19 10:12:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:12:12,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:12,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:12,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:12,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:12,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash -819666699, now seen corresponding path program 1 times [2022-07-19 10:12:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:12,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384117980] [2022-07-19 10:12:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:12:12,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:12,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:12,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:12,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-19 10:12:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:12:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 10:12:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 10:12:12,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:12:12,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384117980] [2022-07-19 10:12:12,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384117980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:12:12,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:12:12,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:12:12,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292055433] [2022-07-19 10:12:12,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:12:12,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:12:12,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:12,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:12:12,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:12:12,468 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:12:12,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:12,730 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2022-07-19 10:12:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:12:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-19 10:12:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:12,733 INFO L225 Difference]: With dead ends: 157 [2022-07-19 10:12:12,733 INFO L226 Difference]: Without dead ends: 118 [2022-07-19 10:12:12,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:12:12,734 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:12,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 58 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:12:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-19 10:12:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 84. [2022-07-19 10:12:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:12:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-07-19 10:12:12,764 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 42 [2022-07-19 10:12:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:12,765 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-07-19 10:12:12,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:12:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-07-19 10:12:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:12:12,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:12,768 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:12,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:12,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:12,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1406472713, now seen corresponding path program 1 times [2022-07-19 10:12:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:12,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57047217] [2022-07-19 10:12:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:12:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:12,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:12,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-19 10:12:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:12:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:12:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:12:13,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:12:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 10:12:13,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57047217] [2022-07-19 10:12:13,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57047217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:12:13,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:12:13,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-07-19 10:12:13,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309330079] [2022-07-19 10:12:13,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:12:13,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:12:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:12:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:12:13,999 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:12:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:15,340 INFO L93 Difference]: Finished difference Result 152 states and 193 transitions. [2022-07-19 10:12:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:12:15,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-07-19 10:12:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:15,347 INFO L225 Difference]: With dead ends: 152 [2022-07-19 10:12:15,347 INFO L226 Difference]: Without dead ends: 103 [2022-07-19 10:12:15,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:12:15,348 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:15,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 155 Invalid, 0 Unknown, 161 Unchecked, 0.8s Time] [2022-07-19 10:12:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-19 10:12:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-07-19 10:12:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:12:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-07-19 10:12:15,371 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 42 [2022-07-19 10:12:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:15,371 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-07-19 10:12:15,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:12:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-07-19 10:12:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:12:15,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:15,373 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:15,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:15,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:15,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1439159703, now seen corresponding path program 4 times [2022-07-19 10:12:15,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:15,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249542031] [2022-07-19 10:12:15,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:12:15,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:15,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:15,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-19 10:12:15,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:12:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:12:15,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 10:12:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 10:12:16,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:12:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 10:12:16,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249542031] [2022-07-19 10:12:16,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249542031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:12:16,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:12:16,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-07-19 10:12:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248699869] [2022-07-19 10:12:16,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:12:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 10:12:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 10:12:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:12:16,258 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:16,765 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2022-07-19 10:12:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 10:12:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-07-19 10:12:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:16,767 INFO L225 Difference]: With dead ends: 132 [2022-07-19 10:12:16,767 INFO L226 Difference]: Without dead ends: 121 [2022-07-19 10:12:16,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:12:16,768 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 179 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:16,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 106 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 79 Invalid, 0 Unknown, 160 Unchecked, 0.4s Time] [2022-07-19 10:12:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-19 10:12:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 88. [2022-07-19 10:12:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.236842105263158) internal successors, (94), 76 states have internal predecessors, (94), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:12:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-07-19 10:12:16,783 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 43 [2022-07-19 10:12:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:16,783 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-07-19 10:12:16,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-07-19 10:12:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:12:16,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:16,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:16,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:16,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:16,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash -449271315, now seen corresponding path program 2 times [2022-07-19 10:12:16,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:16,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711872625] [2022-07-19 10:12:16,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:12:16,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:16,990 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:16,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-19 10:12:17,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:12:17,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:12:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 10:12:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 10:12:17,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:12:17,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:17,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711872625] [2022-07-19 10:12:17,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711872625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:12:17,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:12:17,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:12:17,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258327467] [2022-07-19 10:12:17,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:12:17,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:12:17,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:17,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:12:17,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:12:17,263 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:12:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:17,276 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2022-07-19 10:12:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:12:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-07-19 10:12:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:17,277 INFO L225 Difference]: With dead ends: 140 [2022-07-19 10:12:17,278 INFO L226 Difference]: Without dead ends: 89 [2022-07-19 10:12:17,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:12:17,279 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:17,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 55 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-07-19 10:12:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-19 10:12:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-19 10:12:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:12:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-07-19 10:12:17,293 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 43 [2022-07-19 10:12:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:17,293 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-07-19 10:12:17,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:12:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-07-19 10:12:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:12:17,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:17,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:17,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:17,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:17,505 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:17,505 INFO L85 PathProgramCache]: Analyzing trace with hash 822903975, now seen corresponding path program 5 times [2022-07-19 10:12:17,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081119903] [2022-07-19 10:12:17,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:12:17,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:17,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:17,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:17,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-19 10:12:17,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:12:17,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:12:17,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 10:12:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:27,566 WARN L233 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 27 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:12:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:12:39,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:12:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 10:12:39,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:39,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081119903] [2022-07-19 10:12:39,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081119903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:12:39,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:12:39,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2022-07-19 10:12:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507626578] [2022-07-19 10:12:39,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:12:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 10:12:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 10:12:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=403, Unknown=5, NotChecked=0, Total=506 [2022-07-19 10:12:39,712 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:40,188 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2022-07-19 10:12:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:12:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-07-19 10:12:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:40,190 INFO L225 Difference]: With dead ends: 138 [2022-07-19 10:12:40,190 INFO L226 Difference]: Without dead ends: 126 [2022-07-19 10:12:40,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=112, Invalid=483, Unknown=5, NotChecked=0, Total=600 [2022-07-19 10:12:40,191 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:40,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 211 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-07-19 10:12:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-19 10:12:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2022-07-19 10:12:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 99 states have internal predecessors, (118), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:12:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2022-07-19 10:12:40,204 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 45 [2022-07-19 10:12:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:40,205 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2022-07-19 10:12:40,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2022-07-19 10:12:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:12:40,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:40,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:40,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:40,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1412646757, now seen corresponding path program 6 times [2022-07-19 10:12:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550096236] [2022-07-19 10:12:40,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:12:40,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:40,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:40,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-19 10:12:40,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 10:12:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:12:40,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:12:40,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 10:12:40,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:12:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 10:12:41,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550096236] [2022-07-19 10:12:41,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550096236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:12:41,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:12:41,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2022-07-19 10:12:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240145681] [2022-07-19 10:12:41,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:12:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 10:12:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:12:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 10:12:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:12:41,443 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:12:42,111 INFO L93 Difference]: Finished difference Result 191 states and 222 transitions. [2022-07-19 10:12:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:12:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2022-07-19 10:12:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:12:42,113 INFO L225 Difference]: With dead ends: 191 [2022-07-19 10:12:42,113 INFO L226 Difference]: Without dead ends: 157 [2022-07-19 10:12:42,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:12:42,114 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:12:42,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 178 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-07-19 10:12:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-19 10:12:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2022-07-19 10:12:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 129 states have (on average 1.193798449612403) internal successors, (154), 129 states have internal predecessors, (154), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 10:12:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2022-07-19 10:12:42,142 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 47 [2022-07-19 10:12:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:12:42,143 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2022-07-19 10:12:42,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:12:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2022-07-19 10:12:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:12:42,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:12:42,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:12:42,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-19 10:12:42,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:12:42,348 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:12:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:12:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2057551895, now seen corresponding path program 3 times [2022-07-19 10:12:42,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:12:42,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24579095] [2022-07-19 10:12:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:12:42,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:12:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:12:42,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:12:42,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-19 10:12:42,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:12:42,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:12:42,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:12:42,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:12:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 10:12:49,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:12:49,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:12:49,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24579095] [2022-07-19 10:12:49,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24579095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:12:49,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [411029800] [2022-07-19 10:12:49,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:12:49,869 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-19 10:12:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-19 10:12:49,870 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-19 10:12:49,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-19 10:12:49,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:12:49,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:12:49,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 10:12:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:13:06,559 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 27 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:13:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 10:13:07,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:13:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:13:07,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [411029800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:13:07,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:13:07,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 25 [2022-07-19 10:13:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101239261] [2022-07-19 10:13:07,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:13:07,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 10:13:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:13:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 10:13:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=512, Unknown=3, NotChecked=0, Total=650 [2022-07-19 10:13:07,875 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 25 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-19 10:13:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:13:13,197 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2022-07-19 10:13:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 10:13:13,198 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2022-07-19 10:13:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:13:13,199 INFO L225 Difference]: With dead ends: 207 [2022-07-19 10:13:13,200 INFO L226 Difference]: Without dead ends: 199 [2022-07-19 10:13:13,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=208, Invalid=781, Unknown=3, NotChecked=0, Total=992 [2022-07-19 10:13:13,201 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:13:13,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 271 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 279 Unchecked, 0.7s Time] [2022-07-19 10:13:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-19 10:13:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2022-07-19 10:13:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 143 states have internal predecessors, (171), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 10:13:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 197 transitions. [2022-07-19 10:13:13,227 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 197 transitions. Word has length 47 [2022-07-19 10:13:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:13:13,227 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 197 transitions. [2022-07-19 10:13:13,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-19 10:13:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 197 transitions. [2022-07-19 10:13:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:13:13,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:13:13,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:13:13,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-07-19 10:13:13,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-19 10:13:13,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:13:13,632 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:13:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:13:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2007296949, now seen corresponding path program 7 times [2022-07-19 10:13:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:13:13,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960543273] [2022-07-19 10:13:13,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:13:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:13:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:13:13,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:13:13,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-19 10:13:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:13:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:13:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:13:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 10:13:14,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:13:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 10:13:14,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:13:14,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960543273] [2022-07-19 10:13:14,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960543273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:13:14,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:13:14,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2022-07-19 10:13:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104011799] [2022-07-19 10:13:14,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:13:14,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 10:13:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:13:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 10:13:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:13:14,247 INFO L87 Difference]: Start difference. First operand 169 states and 197 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:13:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:13:15,031 INFO L93 Difference]: Finished difference Result 319 states and 371 transitions. [2022-07-19 10:13:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 10:13:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2022-07-19 10:13:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:13:15,032 INFO L225 Difference]: With dead ends: 319 [2022-07-19 10:13:15,032 INFO L226 Difference]: Without dead ends: 168 [2022-07-19 10:13:15,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-19 10:13:15,034 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:13:15,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 57 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 103 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2022-07-19 10:13:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-19 10:13:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-07-19 10:13:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 138 states have internal predecessors, (164), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 10:13:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2022-07-19 10:13:15,060 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 54 [2022-07-19 10:13:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:13:15,060 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2022-07-19 10:13:15,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:13:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2022-07-19 10:13:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:13:15,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:13:15,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:13:15,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-19 10:13:15,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:13:15,271 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:13:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:13:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2102203757, now seen corresponding path program 4 times [2022-07-19 10:13:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:13:15,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722204962] [2022-07-19 10:13:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:13:15,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:13:15,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:13:15,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:13:15,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-19 10:13:15,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:13:15,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:13:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:13:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:13:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 10:13:15,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:13:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 10:13:16,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:13:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722204962] [2022-07-19 10:13:16,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722204962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:13:16,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:13:16,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-07-19 10:13:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51899787] [2022-07-19 10:13:16,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:13:16,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:13:16,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:13:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:13:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:13:16,216 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:13:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:13:17,519 INFO L93 Difference]: Finished difference Result 423 states and 506 transitions. [2022-07-19 10:13:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 10:13:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2022-07-19 10:13:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:13:17,528 INFO L225 Difference]: With dead ends: 423 [2022-07-19 10:13:17,528 INFO L226 Difference]: Without dead ends: 279 [2022-07-19 10:13:17,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2022-07-19 10:13:17,529 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 10:13:17,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 196 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 163 Invalid, 0 Unknown, 102 Unchecked, 0.9s Time] [2022-07-19 10:13:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-19 10:13:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 246. [2022-07-19 10:13:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 210 states have (on average 1.2190476190476192) internal successors, (256), 211 states have internal predecessors, (256), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 10:13:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 300 transitions. [2022-07-19 10:13:17,570 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 300 transitions. Word has length 54 [2022-07-19 10:13:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:13:17,570 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 300 transitions. [2022-07-19 10:13:17,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:13:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 300 transitions. [2022-07-19 10:13:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 10:13:17,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:13:17,573 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:13:17,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-19 10:13:17,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:13:17,785 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:13:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:13:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -413774097, now seen corresponding path program 8 times [2022-07-19 10:13:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:13:17,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411147563] [2022-07-19 10:13:17,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:13:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:13:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:13:17,787 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:13:17,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-19 10:13:17,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:13:17,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:13:17,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 10:13:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:13:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:13:18,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:13:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 10:13:19,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:13:19,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411147563] [2022-07-19 10:13:19,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411147563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:13:19,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:13:19,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2022-07-19 10:13:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240231567] [2022-07-19 10:13:19,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:13:19,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:13:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:13:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:13:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:13:19,240 INFO L87 Difference]: Start difference. First operand 246 states and 300 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:13:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:13:19,798 INFO L93 Difference]: Finished difference Result 411 states and 509 transitions. [2022-07-19 10:13:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 10:13:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2022-07-19 10:13:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:13:19,801 INFO L225 Difference]: With dead ends: 411 [2022-07-19 10:13:19,801 INFO L226 Difference]: Without dead ends: 405 [2022-07-19 10:13:19,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2022-07-19 10:13:19,802 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:13:19,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 238 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-07-19 10:13:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-19 10:13:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 348. [2022-07-19 10:13:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 300 states have (on average 1.2366666666666666) internal successors, (371), 301 states have internal predecessors, (371), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-19 10:13:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 431 transitions. [2022-07-19 10:13:19,865 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 431 transitions. Word has length 57 [2022-07-19 10:13:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:13:19,865 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 431 transitions. [2022-07-19 10:13:19,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 10:13:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 431 transitions. [2022-07-19 10:13:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 10:13:19,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:13:19,867 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:13:19,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-19 10:13:20,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:13:20,080 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:13:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:13:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash -328932885, now seen corresponding path program 5 times [2022-07-19 10:13:20,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:13:20,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974251740] [2022-07-19 10:13:20,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:13:20,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:13:20,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:13:20,082 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:13:20,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-19 10:13:20,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 10:13:20,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:13:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:13:20,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:13:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 10:13:20,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:13:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 10:13:21,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:13:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974251740] [2022-07-19 10:13:21,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974251740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:13:21,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:13:21,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2022-07-19 10:13:21,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802898254] [2022-07-19 10:13:21,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:13:21,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:13:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:13:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:13:21,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:13:21,290 INFO L87 Difference]: Start difference. First operand 348 states and 431 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 10:13:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:13:33,239 INFO L93 Difference]: Finished difference Result 1496 states and 1933 transitions. [2022-07-19 10:13:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-19 10:13:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2022-07-19 10:13:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:13:33,244 INFO L225 Difference]: With dead ends: 1496 [2022-07-19 10:13:33,244 INFO L226 Difference]: Without dead ends: 855 [2022-07-19 10:13:33,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3096 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1899, Invalid=7031, Unknown=0, NotChecked=0, Total=8930 [2022-07-19 10:13:33,248 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 639 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:13:33,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 361 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-19 10:13:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-19 10:13:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 425. [2022-07-19 10:13:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 377 states have (on average 1.2519893899204244) internal successors, (472), 378 states have internal predecessors, (472), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-19 10:13:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 532 transitions. [2022-07-19 10:13:33,366 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 532 transitions. Word has length 57 [2022-07-19 10:13:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:13:33,367 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 532 transitions. [2022-07-19 10:13:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 10:13:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 532 transitions. [2022-07-19 10:13:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 10:13:33,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:13:33,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:13:33,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-19 10:13:33,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:13:33,580 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:13:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:13:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1673343477, now seen corresponding path program 9 times [2022-07-19 10:13:33,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:13:33,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655910950] [2022-07-19 10:13:33,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:13:33,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:13:33,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:13:33,583 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:13:33,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-19 10:13:34,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-19 10:13:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:13:34,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-19 10:13:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:13:34,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2022-07-19 10:13:34,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:34,611 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 34 treesize of output 33 [2022-07-19 10:13:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:35,116 INFO L356 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2022-07-19 10:13:35,116 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 3 case distinctions, treesize of input 38 treesize of output 40 [2022-07-19 10:13:35,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:35,715 INFO L356 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2022-07-19 10:13:35,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 57 [2022-07-19 10:13:49,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:49,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:13:50,349 INFO L356 Elim1Store]: treesize reduction 180, result has 41.0 percent of original size [2022-07-19 10:13:50,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 156 [2022-07-19 10:14:01,543 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (bvadd (bvmul (bvmul (_ bv4 32) ((_ extract 31 0) ~ARR_SIZE~0)) ((_ extract 31 0) (bvadd (bvmul (_ bv18446744073709551615 64) |ULTIMATE.start_main_~index2~0#1|) ~ARR_SIZE~0 (_ bv18446744073709551615 64)))) |ULTIMATE.start_main_~#array~0#1.offset| (bvmul (_ bv4 32) ((_ extract 31 0) |ULTIMATE.start_main_~index2~0#1|))) (_ bv0 32)) [2022-07-19 10:14:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:14:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:14:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:14:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver