./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/byte_add_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/byte_add_2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:31:04,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:31:04,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:31:04,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:31:04,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:31:04,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:31:04,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:31:04,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:31:04,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:31:04,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:31:04,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:31:04,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:31:04,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:31:04,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:31:04,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:31:04,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:31:04,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:31:04,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:31:04,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:31:04,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:31:04,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:31:04,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:31:04,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:31:04,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:31:04,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:31:04,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:31:04,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:31:04,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:31:04,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:31:04,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:31:04,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:31:04,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:31:04,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:31:04,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:31:04,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:31:04,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:31:04,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:31:04,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:31:04,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:31:04,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:31:04,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:31:04,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:31:04,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:31:04,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:31:04,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:31:04,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:31:04,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:31:04,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:31:04,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:31:04,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:31:04,650 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:31:04,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:31:04,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:31:04,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:31:04,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:31:04,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:31:04,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:31:04,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:31:04,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:31:04,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:31:04,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:31:04,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:31:04,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:31:04,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:31:04,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:31:04,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:31:04,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:31:04,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:31:04,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:31:04,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:31:04,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:31:04,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:31:04,655 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:31:04,655 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:31:04,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:31:04,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:31:04,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba [2021-12-17 02:31:04,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:31:04,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:31:04,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:31:04,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:31:04,917 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:31:04,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-17 02:31:04,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0603a007e/8dd10b5885fb4966bd8fbe8812c7206f/FLAGe201f23cd [2021-12-17 02:31:05,355 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:31:05,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-17 02:31:05,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0603a007e/8dd10b5885fb4966bd8fbe8812c7206f/FLAGe201f23cd [2021-12-17 02:31:05,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0603a007e/8dd10b5885fb4966bd8fbe8812c7206f [2021-12-17 02:31:05,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:31:05,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:31:05,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:31:05,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:31:05,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:31:05,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:31:05" (1/1) ... [2021-12-17 02:31:05,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc41376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:05, skipping insertion in model container [2021-12-17 02:31:05,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:31:05" (1/1) ... [2021-12-17 02:31:05,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:31:05,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:31:05,923 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/bitvector/byte_add_2-2.i[1168,1181] [2021-12-17 02:31:05,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:31:05,958 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:31:05,968 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/bitvector/byte_add_2-2.i[1168,1181] [2021-12-17 02:31:05,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:31:06,000 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:31:06,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06 WrapperNode [2021-12-17 02:31:06,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:31:06,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:31:06,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:31:06,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:31:06,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,032 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-12-17 02:31:06,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:31:06,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:31:06,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:31:06,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:31:06,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:31:06,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:31:06,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:31:06,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:31:06,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (1/1) ... [2021-12-17 02:31:06,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:31:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:31:06,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 02:31:06,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 02:31:06,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:31:06,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:31:06,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:31:06,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:31:06,175 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:31:06,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:31:06,391 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:31:06,402 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:31:06,402 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 02:31:06,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:31:06 BoogieIcfgContainer [2021-12-17 02:31:06,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:31:06,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:31:06,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:31:06,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:31:06,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:31:05" (1/3) ... [2021-12-17 02:31:06,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281af506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:31:06, skipping insertion in model container [2021-12-17 02:31:06,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:06" (2/3) ... [2021-12-17 02:31:06,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281af506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:31:06, skipping insertion in model container [2021-12-17 02:31:06,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:31:06" (3/3) ... [2021-12-17 02:31:06,415 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-12-17 02:31:06,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:31:06,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:31:06,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:31:06,486 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 02:31:06,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:31:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 02:31:06,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:06,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:06,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-17 02:31:06,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:06,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57544735] [2021-12-17 02:31:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:06,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:06,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:06,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57544735] [2021-12-17 02:31:06,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57544735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:06,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:06,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 02:31:06,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854268163] [2021-12-17 02:31:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:06,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 02:31:06,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 02:31:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:31:06,715 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:06,737 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-17 02:31:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 02:31:06,739 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 02:31:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:06,748 INFO L225 Difference]: With dead ends: 57 [2021-12-17 02:31:06,748 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 02:31:06,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:31:06,755 INFO L933 BasicCegarLoop]: 68 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, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:06,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:31:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 02:31:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 02:31:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-17 02:31:06,789 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-17 02:31:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:06,789 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-17 02:31:06,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-17 02:31:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 02:31:06,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:06,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:06,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:31:06,793 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-17 02:31:06,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:06,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683487618] [2021-12-17 02:31:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:06,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:06,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:06,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683487618] [2021-12-17 02:31:06,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683487618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:06,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:06,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:31:06,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491262172] [2021-12-17 02:31:06,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:06,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:31:06,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:06,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:31:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:06,958 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:07,100 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-12-17 02:31:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:31:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 02:31:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:07,104 INFO L225 Difference]: With dead ends: 89 [2021-12-17 02:31:07,105 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 02:31:07,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:07,111 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:07,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 02:31:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-12-17 02:31:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-12-17 02:31:07,125 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-12-17 02:31:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:07,127 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-12-17 02:31:07,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-12-17 02:31:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 02:31:07,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:07,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:07,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:31:07,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-12-17 02:31:07,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973522632] [2021-12-17 02:31:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:07,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:31:07,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:07,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973522632] [2021-12-17 02:31:07,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973522632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:07,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:07,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:31:07,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460850640] [2021-12-17 02:31:07,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:07,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:31:07,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:07,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:31:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:07,258 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:07,446 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-12-17 02:31:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:31:07,447 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-17 02:31:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:07,448 INFO L225 Difference]: With dead ends: 143 [2021-12-17 02:31:07,448 INFO L226 Difference]: Without dead ends: 105 [2021-12-17 02:31:07,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:07,449 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:07,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-17 02:31:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-12-17 02:31:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-12-17 02:31:07,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-12-17 02:31:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:07,466 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-12-17 02:31:07,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-12-17 02:31:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 02:31:07,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:07,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:07,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 02:31:07,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-12-17 02:31:07,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:07,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061556488] [2021-12-17 02:31:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:07,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:31:07,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061556488] [2021-12-17 02:31:07,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061556488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:07,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:07,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:31:07,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671667076] [2021-12-17 02:31:07,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:07,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:31:07,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:31:07,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:07,578 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:07,583 INFO L93 Difference]: Finished difference Result 104 states and 156 transitions. [2021-12-17 02:31:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:31:07,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 02:31:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:07,584 INFO L225 Difference]: With dead ends: 104 [2021-12-17 02:31:07,584 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 02:31:07,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:07,586 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 55 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:07,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:31:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 02:31:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-17 02:31:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 51 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 77 transitions. [2021-12-17 02:31:07,590 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 77 transitions. Word has length 19 [2021-12-17 02:31:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:07,590 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 77 transitions. [2021-12-17 02:31:07,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 77 transitions. [2021-12-17 02:31:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 02:31:07,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:07,592 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:07,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 02:31:07,592 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-12-17 02:31:07,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:07,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771970019] [2021-12-17 02:31:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:07,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:07,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:07,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771970019] [2021-12-17 02:31:07,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771970019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:07,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:07,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:31:07,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587609565] [2021-12-17 02:31:07,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:07,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:31:07,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:07,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:31:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:07,643 INFO L87 Difference]: Start difference. First operand 52 states and 77 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:07,653 INFO L93 Difference]: Finished difference Result 73 states and 107 transitions. [2021-12-17 02:31:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:31:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-17 02:31:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:07,655 INFO L225 Difference]: With dead ends: 73 [2021-12-17 02:31:07,655 INFO L226 Difference]: Without dead ends: 62 [2021-12-17 02:31:07,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:07,658 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:07,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:31:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-17 02:31:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-17 02:31:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2021-12-17 02:31:07,669 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 25 [2021-12-17 02:31:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:07,670 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2021-12-17 02:31:07,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2021-12-17 02:31:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 02:31:07,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:07,671 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:07,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 02:31:07,672 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1738293938, now seen corresponding path program 1 times [2021-12-17 02:31:07,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:07,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564479657] [2021-12-17 02:31:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:07,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:07,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564479657] [2021-12-17 02:31:07,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564479657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:07,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:07,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:31:07,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935039465] [2021-12-17 02:31:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:07,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:31:07,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:31:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:07,829 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:07,991 INFO L93 Difference]: Finished difference Result 169 states and 249 transitions. [2021-12-17 02:31:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:31:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-17 02:31:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:07,992 INFO L225 Difference]: With dead ends: 169 [2021-12-17 02:31:07,992 INFO L226 Difference]: Without dead ends: 121 [2021-12-17 02:31:07,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:07,994 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 82 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:07,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 150 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-17 02:31:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 67. [2021-12-17 02:31:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2021-12-17 02:31:07,999 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 25 [2021-12-17 02:31:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:08,000 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2021-12-17 02:31:08,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2021-12-17 02:31:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 02:31:08,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:08,001 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:08,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 02:31:08,001 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1125876944, now seen corresponding path program 1 times [2021-12-17 02:31:08,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:08,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706171944] [2021-12-17 02:31:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:08,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:08,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:08,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706171944] [2021-12-17 02:31:08,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706171944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:31:08,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225738157] [2021-12-17 02:31:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:08,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:31:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:31:08,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:31:08,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 02:31:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:08,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:31:08,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:08,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:08,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225738157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:08,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 02:31:08,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-17 02:31:08,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427424712] [2021-12-17 02:31:08,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:08,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:31:08,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:08,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:31:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:31:08,268 INFO L87 Difference]: Start difference. First operand 67 states and 96 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:08,426 INFO L93 Difference]: Finished difference Result 153 states and 251 transitions. [2021-12-17 02:31:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:31:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 02:31:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:08,428 INFO L225 Difference]: With dead ends: 153 [2021-12-17 02:31:08,428 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 02:31:08,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:31:08,429 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:08,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 59 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:31:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 02:31:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-12-17 02:31:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2021-12-17 02:31:08,434 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 26 [2021-12-17 02:31:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:08,434 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2021-12-17 02:31:08,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2021-12-17 02:31:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 02:31:08,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:08,435 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-12-17 02:31:08,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:08,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:31:08,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash 801426209, now seen corresponding path program 1 times [2021-12-17 02:31:08,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:08,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256135840] [2021-12-17 02:31:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:08,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:08,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:08,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256135840] [2021-12-17 02:31:08,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256135840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:31:08,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260842640] [2021-12-17 02:31:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:08,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:31:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:31:08,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:31:08,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 02:31:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:31:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 02:31:08,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:08,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260842640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:08,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 02:31:08,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 02:31:08,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551362482] [2021-12-17 02:31:08,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:08,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:31:08,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:31:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:08,990 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:09,079 INFO L93 Difference]: Finished difference Result 193 states and 267 transitions. [2021-12-17 02:31:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:09,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-17 02:31:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:09,080 INFO L225 Difference]: With dead ends: 193 [2021-12-17 02:31:09,080 INFO L226 Difference]: Without dead ends: 104 [2021-12-17 02:31:09,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:31:09,082 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:09,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 46 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-17 02:31:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2021-12-17 02:31:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3488372093023255) internal successors, (116), 86 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2021-12-17 02:31:09,086 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 32 [2021-12-17 02:31:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:09,086 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2021-12-17 02:31:09,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2021-12-17 02:31:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:31:09,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:09,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-12-17 02:31:09,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:09,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 02:31:09,293 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash 763937393, now seen corresponding path program 1 times [2021-12-17 02:31:09,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:09,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603838797] [2021-12-17 02:31:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:09,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 02:31:09,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603838797] [2021-12-17 02:31:09,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603838797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:09,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:09,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:31:09,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252842422] [2021-12-17 02:31:09,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:09,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:31:09,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:31:09,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:09,388 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:09,524 INFO L93 Difference]: Finished difference Result 253 states and 361 transitions. [2021-12-17 02:31:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:09,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 02:31:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:09,525 INFO L225 Difference]: With dead ends: 253 [2021-12-17 02:31:09,526 INFO L226 Difference]: Without dead ends: 181 [2021-12-17 02:31:09,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:09,527 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:09,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-17 02:31:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 121. [2021-12-17 02:31:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2021-12-17 02:31:09,532 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 39 [2021-12-17 02:31:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:09,532 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2021-12-17 02:31:09,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2021-12-17 02:31:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:31:09,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:09,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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] [2021-12-17 02:31:09,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 02:31:09,534 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1940214352, now seen corresponding path program 1 times [2021-12-17 02:31:09,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:09,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337355307] [2021-12-17 02:31:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:09,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 02:31:09,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337355307] [2021-12-17 02:31:09,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337355307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:09,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:09,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:31:09,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387958846] [2021-12-17 02:31:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:09,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:31:09,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:31:09,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:09,591 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:09,707 INFO L93 Difference]: Finished difference Result 342 states and 498 transitions. [2021-12-17 02:31:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-17 02:31:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:09,712 INFO L225 Difference]: With dead ends: 342 [2021-12-17 02:31:09,712 INFO L226 Difference]: Without dead ends: 236 [2021-12-17 02:31:09,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:09,713 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:09,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 50 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-17 02:31:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 155. [2021-12-17 02:31:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4870129870129871) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 229 transitions. [2021-12-17 02:31:09,718 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 229 transitions. Word has length 52 [2021-12-17 02:31:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:09,719 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 229 transitions. [2021-12-17 02:31:09,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 229 transitions. [2021-12-17 02:31:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 02:31:09,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:09,720 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:09,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 02:31:09,721 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash -564670639, now seen corresponding path program 1 times [2021-12-17 02:31:09,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:09,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62274112] [2021-12-17 02:31:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:09,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 02:31:09,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:09,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62274112] [2021-12-17 02:31:09,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62274112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:09,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:09,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:31:09,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326991365] [2021-12-17 02:31:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:09,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:31:09,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:31:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:09,797 INFO L87 Difference]: Start difference. First operand 155 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:10,017 INFO L93 Difference]: Finished difference Result 607 states and 894 transitions. [2021-12-17 02:31:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:31:10,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-17 02:31:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:10,019 INFO L225 Difference]: With dead ends: 607 [2021-12-17 02:31:10,019 INFO L226 Difference]: Without dead ends: 468 [2021-12-17 02:31:10,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:10,020 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 147 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:10,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 222 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:31:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-17 02:31:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 155. [2021-12-17 02:31:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4870129870129871) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 229 transitions. [2021-12-17 02:31:10,026 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 229 transitions. Word has length 65 [2021-12-17 02:31:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:10,027 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 229 transitions. [2021-12-17 02:31:10,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 229 transitions. [2021-12-17 02:31:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 02:31:10,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:10,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:10,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 02:31:10,028 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1543642426, now seen corresponding path program 1 times [2021-12-17 02:31:10,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:10,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285782046] [2021-12-17 02:31:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:10,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 02:31:10,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:10,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285782046] [2021-12-17 02:31:10,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285782046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:10,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:10,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:31:10,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950056902] [2021-12-17 02:31:10,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:10,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:31:10,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:10,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:31:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:10,093 INFO L87 Difference]: Start difference. First operand 155 states and 229 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:10,171 INFO L93 Difference]: Finished difference Result 503 states and 745 transitions. [2021-12-17 02:31:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:10,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 02:31:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:10,173 INFO L225 Difference]: With dead ends: 503 [2021-12-17 02:31:10,173 INFO L226 Difference]: Without dead ends: 364 [2021-12-17 02:31:10,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:10,174 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 114 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:10,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 138 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-17 02:31:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 269. [2021-12-17 02:31:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5037313432835822) internal successors, (403), 268 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 403 transitions. [2021-12-17 02:31:10,183 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 403 transitions. Word has length 66 [2021-12-17 02:31:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:10,184 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 403 transitions. [2021-12-17 02:31:10,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 403 transitions. [2021-12-17 02:31:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 02:31:10,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:10,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:10,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 02:31:10,185 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1373754372, now seen corresponding path program 1 times [2021-12-17 02:31:10,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:10,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821576769] [2021-12-17 02:31:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:10,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 02:31:10,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821576769] [2021-12-17 02:31:10,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821576769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:10,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:10,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:31:10,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889823071] [2021-12-17 02:31:10,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:10,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:31:10,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:31:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:10,311 INFO L87 Difference]: Start difference. First operand 269 states and 403 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:10,767 INFO L93 Difference]: Finished difference Result 1362 states and 2021 transitions. [2021-12-17 02:31:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:31:10,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 02:31:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:10,773 INFO L225 Difference]: With dead ends: 1362 [2021-12-17 02:31:10,773 INFO L226 Difference]: Without dead ends: 1109 [2021-12-17 02:31:10,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:31:10,775 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 297 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:10,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 422 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:31:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-12-17 02:31:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 262. [2021-12-17 02:31:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5134099616858236) internal successors, (395), 261 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 395 transitions. [2021-12-17 02:31:10,788 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 395 transitions. Word has length 66 [2021-12-17 02:31:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:10,788 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 395 transitions. [2021-12-17 02:31:10,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 395 transitions. [2021-12-17 02:31:10,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 02:31:10,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:10,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:10,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 02:31:10,790 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:10,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1708732925, now seen corresponding path program 1 times [2021-12-17 02:31:10,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:10,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386705406] [2021-12-17 02:31:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:10,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 02:31:10,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386705406] [2021-12-17 02:31:10,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386705406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:31:10,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452243304] [2021-12-17 02:31:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:10,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:31:10,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:31:10,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:31:10,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 02:31:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 02:31:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 02:31:11,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-17 02:31:11,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452243304] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:11,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:31:11,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2021-12-17 02:31:11,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300170973] [2021-12-17 02:31:11,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:11,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:31:11,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:31:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:31:11,392 INFO L87 Difference]: Start difference. First operand 262 states and 395 transitions. Second operand has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:11,807 INFO L93 Difference]: Finished difference Result 1378 states and 2098 transitions. [2021-12-17 02:31:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:31:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-17 02:31:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:11,812 INFO L225 Difference]: With dead ends: 1378 [2021-12-17 02:31:11,812 INFO L226 Difference]: Without dead ends: 1115 [2021-12-17 02:31:11,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:31:11,813 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 294 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:11,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 141 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:31:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-12-17 02:31:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 937. [2021-12-17 02:31:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 1.4145299145299146) internal successors, (1324), 936 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1324 transitions. [2021-12-17 02:31:11,842 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1324 transitions. Word has length 68 [2021-12-17 02:31:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:11,842 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1324 transitions. [2021-12-17 02:31:11,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1324 transitions. [2021-12-17 02:31:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:31:11,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:11,845 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:11,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:12,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:31:12,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1373021230, now seen corresponding path program 1 times [2021-12-17 02:31:12,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:12,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027929799] [2021-12-17 02:31:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:12,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 02:31:12,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:31:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027929799] [2021-12-17 02:31:12,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027929799] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:31:12,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354342165] [2021-12-17 02:31:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:12,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:31:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:31:12,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:31:12,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 02:31:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:12,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 02:31:12,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 02:31:12,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 02:31:12,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354342165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:12,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:31:12,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-17 02:31:12,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824431550] [2021-12-17 02:31:12,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:12,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:31:12,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:31:12,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:31:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:31:12,814 INFO L87 Difference]: Start difference. First operand 937 states and 1324 transitions. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:13,097 INFO L93 Difference]: Finished difference Result 2110 states and 2922 transitions. [2021-12-17 02:31:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:31:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 02:31:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:13,102 INFO L225 Difference]: With dead ends: 2110 [2021-12-17 02:31:13,102 INFO L226 Difference]: Without dead ends: 1196 [2021-12-17 02:31:13,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:31:13,105 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 226 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:13,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 312 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:13,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-12-17 02:31:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 826. [2021-12-17 02:31:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.4084848484848485) internal successors, (1162), 825 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1162 transitions. [2021-12-17 02:31:13,132 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1162 transitions. Word has length 70 [2021-12-17 02:31:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:13,132 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1162 transitions. [2021-12-17 02:31:13,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1162 transitions. [2021-12-17 02:31:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:31:13,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:13,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:13,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:13,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 02:31:13,358 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 2 times [2021-12-17 02:31:13,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:31:13,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236354132] [2021-12-17 02:31:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:13,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:31:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 02:31:13,397 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 02:31:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 02:31:13,478 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 02:31:13,479 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 02:31:13,479 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 02:31:13,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 02:31:13,484 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:13,486 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 02:31:13,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 02:31:13 BoogieIcfgContainer [2021-12-17 02:31:13,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 02:31:13,566 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 02:31:13,566 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 02:31:13,566 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 02:31:13,567 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:31:06" (3/4) ... [2021-12-17 02:31:13,569 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 02:31:13,576 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 02:31:13,577 INFO L158 Benchmark]: Toolchain (without parser) took 7803.02ms. Allocated memory was 88.1MB in the beginning and 142.6MB in the end (delta: 54.5MB). Free memory was 58.5MB in the beginning and 62.9MB in the end (delta: -4.4MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. [2021-12-17 02:31:13,577 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 88.1MB. Free memory is still 56.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 02:31:13,577 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.72ms. Allocated memory is still 88.1MB. Free memory was 58.2MB in the beginning and 46.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 02:31:13,578 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.13ms. Allocated memory is still 88.1MB. Free memory was 46.7MB in the beginning and 44.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 02:31:13,578 INFO L158 Benchmark]: Boogie Preprocessor took 21.12ms. Allocated memory is still 88.1MB. Free memory was 44.9MB in the beginning and 43.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 02:31:13,578 INFO L158 Benchmark]: RCFGBuilder took 348.07ms. Allocated memory is still 88.1MB. Free memory was 43.5MB in the beginning and 31.2MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 02:31:13,578 INFO L158 Benchmark]: TraceAbstraction took 7155.94ms. Allocated memory was 88.1MB in the beginning and 142.6MB in the end (delta: 54.5MB). Free memory was 30.7MB in the beginning and 62.9MB in the end (delta: -32.2MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2021-12-17 02:31:13,579 INFO L158 Benchmark]: Witness Printer took 10.19ms. Allocated memory is still 142.6MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 02:31:13,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 88.1MB. Free memory is still 56.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.72ms. Allocated memory is still 88.1MB. Free memory was 58.2MB in the beginning and 46.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.13ms. Allocated memory is still 88.1MB. Free memory was 46.7MB in the beginning and 44.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.12ms. Allocated memory is still 88.1MB. Free memory was 44.9MB in the beginning and 43.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 348.07ms. Allocated memory is still 88.1MB. Free memory was 43.5MB in the beginning and 31.2MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7155.94ms. Allocated memory was 88.1MB in the beginning and 142.6MB in the end (delta: 54.5MB). Free memory was 30.7MB in the beginning and 62.9MB in the end (delta: -32.2MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. * Witness Printer took 10.19ms. Allocated memory is still 142.6MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L125] a = __VERIFIER_nondet_uint() [L127] b = 234770789 [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=1, nb=4] [L69] COND FALSE !(b3 == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=1, nb=4] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L95] COND TRUE partial_sum > ((unsigned char)255) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=1, na=1, nb=4, partial_sum=20838, r0=234770790] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L83] COND FALSE !(i < na) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L90] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L91] COND TRUE i == (unsigned char)1 [L91] partial_sum = partial_sum + b1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L83] COND FALSE !(i < na) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L90] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L92] COND TRUE i == (unsigned char)2 [L92] partial_sum = partial_sum + b2 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82, r2=254] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82, r2=254] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=254, r0=234770790, r1=82, r2=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L83] COND FALSE !(i < na) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L90] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L93] COND TRUE i == (unsigned char)3 [L93] partial_sum = partial_sum + b3 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=255, \old(b)=234770789, \result=3, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r=3, r0=234770790, r1=82, r2=254, r3=13] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.0s, OverallIterations: 16, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1591 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1591 mSDsluCounter, 2047 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1231 mSDsCounter, 218 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2043 IncrementalHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 218 mSolverCounterUnsat, 816 mSDtfsCounter, 2043 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 440 GetRequests, 360 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=937occurred in iteration=14, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 2071 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 908 ConstructedInterpolants, 0 QuantifiedInterpolants, 3186 SizeOfPredicates, 14 NumberOfNonLiveVariables, 587 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 21 InterpolantComputations, 13 PerfectInterpolantSequences, 780/805 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-17 02:31:13,600 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/bitvector/byte_add_2-2.i -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 de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:31:15,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:31:15,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:31:15,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:31:15,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:31:15,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:31:15,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:31:15,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:31:15,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:31:15,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:31:15,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:31:15,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:31:15,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:31:15,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:31:15,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:31:15,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:31:15,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:31:15,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:31:15,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:31:15,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:31:15,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:31:15,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:31:15,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:31:15,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:31:15,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:31:15,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:31:15,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:31:15,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:31:15,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:31:15,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:31:15,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:31:15,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:31:15,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:31:15,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:31:15,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:31:15,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:31:15,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:31:15,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:31:15,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:31:15,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:31:15,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:31:15,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 02:31:15,641 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:31:15,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:31:15,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:31:15,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:31:15,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:31:15,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:31:15,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:31:15,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:31:15,644 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:31:15,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:31:15,645 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:31:15,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:31:15,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:31:15,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:31:15,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:31:15,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:31:15,646 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 02:31:15,646 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 02:31:15,646 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 02:31:15,647 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:31:15,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:31:15,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:31:15,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:31:15,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:31:15,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:31:15,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:31:15,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:31:15,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:31:15,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:31:15,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:31:15,649 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 02:31:15,649 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 02:31:15,650 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:31:15,650 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:31:15,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:31:15,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:31:15,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 02:31:15,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba [2021-12-17 02:31:15,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:31:15,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:31:15,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:31:15,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:31:15,997 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:31:15,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-17 02:31:16,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674357d76/b2c87a915fd049abb5da0e7ac4024686/FLAG8e01d507f [2021-12-17 02:31:16,528 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:31:16,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-17 02:31:16,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674357d76/b2c87a915fd049abb5da0e7ac4024686/FLAG8e01d507f [2021-12-17 02:31:16,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674357d76/b2c87a915fd049abb5da0e7ac4024686 [2021-12-17 02:31:16,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:31:16,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:31:16,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:31:16,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:31:16,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:31:16,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261ce886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16, skipping insertion in model container [2021-12-17 02:31:16,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:31:16,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:31:16,726 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/bitvector/byte_add_2-2.i[1168,1181] [2021-12-17 02:31:16,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:31:16,822 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:31:16,832 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/bitvector/byte_add_2-2.i[1168,1181] [2021-12-17 02:31:16,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:31:16,859 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:31:16,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16 WrapperNode [2021-12-17 02:31:16,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:31:16,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:31:16,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:31:16,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:31:16,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,901 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-12-17 02:31:16,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:31:16,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:31:16,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:31:16,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:31:16,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:31:16,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:31:16,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:31:16,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:31:16,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (1/1) ... [2021-12-17 02:31:16,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:31:16,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:31:17,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 02:31:17,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 02:31:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:31:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 02:31:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:31:17,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:31:17,123 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:31:17,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:31:17,385 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:31:17,390 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:31:17,391 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 02:31:17,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:31:17 BoogieIcfgContainer [2021-12-17 02:31:17,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:31:17,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:31:17,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:31:17,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:31:17,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:31:16" (1/3) ... [2021-12-17 02:31:17,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245df07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:31:17, skipping insertion in model container [2021-12-17 02:31:17,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:16" (2/3) ... [2021-12-17 02:31:17,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245df07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:31:17, skipping insertion in model container [2021-12-17 02:31:17,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:31:17" (3/3) ... [2021-12-17 02:31:17,414 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-12-17 02:31:17,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:31:17,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:31:17,466 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:31:17,472 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 02:31:17,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:31:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 02:31:17,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:17,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:17,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-17 02:31:17,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700298500] [2021-12-17 02:31:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:17,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:17,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:17,515 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) [2021-12-17 02:31:17,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 02:31:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 02:31:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:17,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:17,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:17,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700298500] [2021-12-17 02:31:17,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700298500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:17,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:17,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 02:31:17,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727599628] [2021-12-17 02:31:17,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:17,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 02:31:17,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 02:31:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:31:17,701 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:17,716 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-17 02:31:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 02:31:17,718 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 02:31:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:17,725 INFO L225 Difference]: With dead ends: 57 [2021-12-17 02:31:17,725 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 02:31:17,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:31:17,730 INFO L933 BasicCegarLoop]: 68 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, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:17,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:31:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 02:31:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 02:31:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-17 02:31:17,759 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-17 02:31:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:17,759 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-17 02:31:17,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-17 02:31:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 02:31:17,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:17,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:17,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:17,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:17,971 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-17 02:31:17,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:17,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138544172] [2021-12-17 02:31:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:17,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:17,975 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) [2021-12-17 02:31:17,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 02:31:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 02:31:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:18,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:18,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138544172] [2021-12-17 02:31:18,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138544172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:18,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:18,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:31:18,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941280450] [2021-12-17 02:31:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:18,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:31:18,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:31:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:18,082 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:18,238 INFO L93 Difference]: Finished difference Result 116 states and 201 transitions. [2021-12-17 02:31:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:31:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 02:31:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:18,240 INFO L225 Difference]: With dead ends: 116 [2021-12-17 02:31:18,240 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 02:31:18,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:18,241 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:18,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 152 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 02:31:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-12-17 02:31:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-17 02:31:18,252 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 12 [2021-12-17 02:31:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:18,253 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-17 02:31:18,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-17 02:31:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 02:31:18,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:18,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:18,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:18,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:18,463 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:18,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1087802014, now seen corresponding path program 1 times [2021-12-17 02:31:18,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:18,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485412428] [2021-12-17 02:31:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:18,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:18,465 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) [2021-12-17 02:31:18,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 02:31:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:18,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 02:31:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:18,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:18,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:18,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485412428] [2021-12-17 02:31:18,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485412428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:18,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:18,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:31:18,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557270183] [2021-12-17 02:31:18,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:18,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:31:18,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:31:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:18,560 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:18,567 INFO L93 Difference]: Finished difference Result 86 states and 134 transitions. [2021-12-17 02:31:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:31:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 02:31:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:18,568 INFO L225 Difference]: With dead ends: 86 [2021-12-17 02:31:18,568 INFO L226 Difference]: Without dead ends: 55 [2021-12-17 02:31:18,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:18,570 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 55 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:18,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:31:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-17 02:31:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-17 02:31:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 54 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 80 transitions. [2021-12-17 02:31:18,577 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 80 transitions. Word has length 13 [2021-12-17 02:31:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:18,577 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 80 transitions. [2021-12-17 02:31:18,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 80 transitions. [2021-12-17 02:31:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 02:31:18,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:18,578 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:18,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:18,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:18,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-12-17 02:31:18,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:18,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737331935] [2021-12-17 02:31:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:18,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:18,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:18,790 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) [2021-12-17 02:31:18,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 02:31:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:18,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 02:31:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:18,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:18,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:18,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737331935] [2021-12-17 02:31:18,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737331935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:18,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:18,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:31:18,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103665540] [2021-12-17 02:31:18,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:18,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:31:18,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:18,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:31:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:18,885 INFO L87 Difference]: Start difference. First operand 55 states and 80 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:19,040 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2021-12-17 02:31:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:31:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-17 02:31:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:19,046 INFO L225 Difference]: With dead ends: 151 [2021-12-17 02:31:19,047 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 02:31:19,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:31:19,050 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 65 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:19,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 146 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 02:31:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 60. [2021-12-17 02:31:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2021-12-17 02:31:19,068 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 25 [2021-12-17 02:31:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:19,068 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2021-12-17 02:31:19,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2021-12-17 02:31:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 02:31:19,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:19,070 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:19,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:19,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:19,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1384042382, now seen corresponding path program 1 times [2021-12-17 02:31:19,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:19,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299075214] [2021-12-17 02:31:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:19,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:19,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:19,282 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) [2021-12-17 02:31:19,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 02:31:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:31:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:19,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:19,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:19,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299075214] [2021-12-17 02:31:19,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299075214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:19,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:19,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:31:19,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63127386] [2021-12-17 02:31:19,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:19,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:31:19,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:19,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:31:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:19,382 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:19,468 INFO L93 Difference]: Finished difference Result 201 states and 290 transitions. [2021-12-17 02:31:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:19,469 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 02:31:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:19,470 INFO L225 Difference]: With dead ends: 201 [2021-12-17 02:31:19,470 INFO L226 Difference]: Without dead ends: 157 [2021-12-17 02:31:19,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:19,471 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 140 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:19,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 295 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-17 02:31:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 60. [2021-12-17 02:31:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2021-12-17 02:31:19,479 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 26 [2021-12-17 02:31:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:19,479 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2021-12-17 02:31:19,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2021-12-17 02:31:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 02:31:19,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:19,481 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:19,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:19,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:19,690 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1985045161, now seen corresponding path program 1 times [2021-12-17 02:31:19,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:19,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892431579] [2021-12-17 02:31:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:19,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:19,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:19,692 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) [2021-12-17 02:31:19,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 02:31:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:31:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:19,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:19,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:19,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892431579] [2021-12-17 02:31:19,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892431579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:19,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:19,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:31:19,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470541635] [2021-12-17 02:31:19,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:19,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:31:19,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:31:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:19,857 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:19,989 INFO L93 Difference]: Finished difference Result 248 states and 355 transitions. [2021-12-17 02:31:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:31:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-17 02:31:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:19,991 INFO L225 Difference]: With dead ends: 248 [2021-12-17 02:31:19,991 INFO L226 Difference]: Without dead ends: 204 [2021-12-17 02:31:19,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:19,992 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 236 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:19,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 690 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-17 02:31:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 92. [2021-12-17 02:31:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 91 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 130 transitions. [2021-12-17 02:31:20,000 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 130 transitions. Word has length 27 [2021-12-17 02:31:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:20,001 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 130 transitions. [2021-12-17 02:31:20,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 130 transitions. [2021-12-17 02:31:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 02:31:20,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:20,002 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:20,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:20,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:20,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 179606827, now seen corresponding path program 1 times [2021-12-17 02:31:20,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:20,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134687888] [2021-12-17 02:31:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:20,214 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) [2021-12-17 02:31:20,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 02:31:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:20,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 02:31:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:20,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:20,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134687888] [2021-12-17 02:31:20,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134687888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:20,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:20,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:31:20,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83397183] [2021-12-17 02:31:20,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:20,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:31:20,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:31:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:31:20,337 INFO L87 Difference]: Start difference. First operand 92 states and 130 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:20,460 INFO L93 Difference]: Finished difference Result 247 states and 352 transitions. [2021-12-17 02:31:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:31:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-17 02:31:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:20,462 INFO L225 Difference]: With dead ends: 247 [2021-12-17 02:31:20,462 INFO L226 Difference]: Without dead ends: 203 [2021-12-17 02:31:20,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:31:20,463 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 192 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:20,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 392 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-17 02:31:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 87. [2021-12-17 02:31:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.441860465116279) internal successors, (124), 86 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2021-12-17 02:31:20,470 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 27 [2021-12-17 02:31:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:20,471 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2021-12-17 02:31:20,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2021-12-17 02:31:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 02:31:20,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:20,472 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:20,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:20,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:20,681 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash 221982208, now seen corresponding path program 1 times [2021-12-17 02:31:20,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:20,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575579150] [2021-12-17 02:31:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:20,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:20,683 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) [2021-12-17 02:31:20,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 02:31:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:20,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 02:31:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:20,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:20,773 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575579150] [2021-12-17 02:31:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575579150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:20,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:31:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078399130] [2021-12-17 02:31:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:20,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:31:20,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:31:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:20,776 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:20,788 INFO L93 Difference]: Finished difference Result 121 states and 172 transitions. [2021-12-17 02:31:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:31:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-17 02:31:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:20,789 INFO L225 Difference]: With dead ends: 121 [2021-12-17 02:31:20,789 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 02:31:20,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:31:20,790 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:20,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:31:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 02:31:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-17 02:31:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4339622641509433) internal successors, (152), 106 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 152 transitions. [2021-12-17 02:31:20,803 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 152 transitions. Word has length 29 [2021-12-17 02:31:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:20,803 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 152 transitions. [2021-12-17 02:31:20,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 152 transitions. [2021-12-17 02:31:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 02:31:20,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:20,804 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 02:31:20,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:21,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:21,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash 480147646, now seen corresponding path program 1 times [2021-12-17 02:31:21,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:21,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040049319] [2021-12-17 02:31:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:21,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:21,017 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) [2021-12-17 02:31:21,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 02:31:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:21,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:31:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:21,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:21,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:21,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040049319] [2021-12-17 02:31:21,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040049319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:21,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:21,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:31:21,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865135992] [2021-12-17 02:31:21,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:21,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:31:21,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:31:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:21,168 INFO L87 Difference]: Start difference. First operand 107 states and 152 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:21,241 INFO L93 Difference]: Finished difference Result 131 states and 182 transitions. [2021-12-17 02:31:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-17 02:31:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:21,244 INFO L225 Difference]: With dead ends: 131 [2021-12-17 02:31:21,244 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 02:31:21,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:21,247 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:21,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 65 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-17 02:31:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 02:31:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2021-12-17 02:31:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 144 transitions. [2021-12-17 02:31:21,259 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 144 transitions. Word has length 29 [2021-12-17 02:31:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:21,259 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 144 transitions. [2021-12-17 02:31:21,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 144 transitions. [2021-12-17 02:31:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 02:31:21,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:21,262 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-17 02:31:21,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:21,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:21,471 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1685904077, now seen corresponding path program 1 times [2021-12-17 02:31:21,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:21,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760871231] [2021-12-17 02:31:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:21,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:21,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:21,473 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) [2021-12-17 02:31:21,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 02:31:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:31:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:21,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:21,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:21,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760871231] [2021-12-17 02:31:21,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760871231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:21,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:21,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:31:21,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009764284] [2021-12-17 02:31:21,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:21,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:31:21,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:31:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:21,628 INFO L87 Difference]: Start difference. First operand 99 states and 144 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:21,661 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2021-12-17 02:31:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-17 02:31:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:21,662 INFO L225 Difference]: With dead ends: 182 [2021-12-17 02:31:21,662 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 02:31:21,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:31:21,663 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:21,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 102 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-12-17 02:31:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 02:31:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-17 02:31:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2021-12-17 02:31:21,668 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 38 [2021-12-17 02:31:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:21,668 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2021-12-17 02:31:21,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2021-12-17 02:31:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:31:21,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:21,669 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:21,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:21,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:21,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash -897635979, now seen corresponding path program 1 times [2021-12-17 02:31:21,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:21,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267060522] [2021-12-17 02:31:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:21,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:21,878 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) [2021-12-17 02:31:21,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 02:31:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 02:31:21,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:22,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:22,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:22,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267060522] [2021-12-17 02:31:22,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267060522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:22,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:22,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:31:22,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523590668] [2021-12-17 02:31:22,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:22,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:31:22,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:31:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:31:22,069 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:22,163 INFO L93 Difference]: Finished difference Result 245 states and 344 transitions. [2021-12-17 02:31:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:31:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 02:31:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:22,164 INFO L225 Difference]: With dead ends: 245 [2021-12-17 02:31:22,164 INFO L226 Difference]: Without dead ends: 195 [2021-12-17 02:31:22,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:31:22,165 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:22,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 174 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2021-12-17 02:31:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-17 02:31:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 145. [2021-12-17 02:31:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3402777777777777) internal successors, (193), 144 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 193 transitions. [2021-12-17 02:31:22,172 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 193 transitions. Word has length 39 [2021-12-17 02:31:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:22,172 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 193 transitions. [2021-12-17 02:31:22,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 193 transitions. [2021-12-17 02:31:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 02:31:22,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:22,174 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:31:22,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:22,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:22,382 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1414100834, now seen corresponding path program 1 times [2021-12-17 02:31:22,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:22,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963050531] [2021-12-17 02:31:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:22,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:22,384 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) [2021-12-17 02:31:22,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 02:31:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:31:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:22,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:22,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963050531] [2021-12-17 02:31:22,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963050531] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:22,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:22,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 02:31:22,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198406988] [2021-12-17 02:31:22,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:22,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:31:22,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:22,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:31:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:31:22,669 INFO L87 Difference]: Start difference. First operand 145 states and 193 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:22,887 INFO L93 Difference]: Finished difference Result 381 states and 582 transitions. [2021-12-17 02:31:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:31:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-17 02:31:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:22,889 INFO L225 Difference]: With dead ends: 381 [2021-12-17 02:31:22,889 INFO L226 Difference]: Without dead ends: 280 [2021-12-17 02:31:22,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:31:22,890 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 257 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:22,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 67 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:31:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-17 02:31:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 225. [2021-12-17 02:31:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4285714285714286) internal successors, (320), 224 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:22,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 320 transitions. [2021-12-17 02:31:22,898 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 320 transitions. Word has length 40 [2021-12-17 02:31:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:22,898 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 320 transitions. [2021-12-17 02:31:22,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 320 transitions. [2021-12-17 02:31:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:31:22,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:22,899 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:22,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:23,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:23,108 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1373021230, now seen corresponding path program 1 times [2021-12-17 02:31:23,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140151231] [2021-12-17 02:31:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:23,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:23,111 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) [2021-12-17 02:31:23,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 02:31:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 02:31:23,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 02:31:23,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 02:31:23,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:23,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140151231] [2021-12-17 02:31:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140151231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:23,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:23,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 02:31:23,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803382945] [2021-12-17 02:31:23,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:23,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:31:23,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:31:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:31:23,489 INFO L87 Difference]: Start difference. First operand 225 states and 320 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:23,717 INFO L93 Difference]: Finished difference Result 678 states and 958 transitions. [2021-12-17 02:31:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:31:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 02:31:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:23,719 INFO L225 Difference]: With dead ends: 678 [2021-12-17 02:31:23,719 INFO L226 Difference]: Without dead ends: 491 [2021-12-17 02:31:23,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:31:23,720 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 293 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:23,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 343 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-17 02:31:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 304. [2021-12-17 02:31:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.4554455445544554) internal successors, (441), 303 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 441 transitions. [2021-12-17 02:31:23,732 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 441 transitions. Word has length 70 [2021-12-17 02:31:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:23,732 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 441 transitions. [2021-12-17 02:31:23,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 441 transitions. [2021-12-17 02:31:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:31:23,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:23,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:23,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:23,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:23,942 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash 343661932, now seen corresponding path program 2 times [2021-12-17 02:31:23,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418509969] [2021-12-17 02:31:23,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:31:23,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:23,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:23,944 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) [2021-12-17 02:31:23,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 02:31:23,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:31:23,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:31:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 02:31:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 66 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 02:31:24,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 02:31:24,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:24,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418509969] [2021-12-17 02:31:24,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418509969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:24,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:24,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-12-17 02:31:24,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609190567] [2021-12-17 02:31:24,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:24,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:31:24,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:24,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:31:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:31:24,340 INFO L87 Difference]: Start difference. First operand 304 states and 441 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:24,515 INFO L93 Difference]: Finished difference Result 743 states and 1038 transitions. [2021-12-17 02:31:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:31:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 02:31:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:24,518 INFO L225 Difference]: With dead ends: 743 [2021-12-17 02:31:24,518 INFO L226 Difference]: Without dead ends: 477 [2021-12-17 02:31:24,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:31:24,519 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 207 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:24,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 293 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:31:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-12-17 02:31:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 282. [2021-12-17 02:31:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.4092526690391458) internal successors, (396), 281 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 396 transitions. [2021-12-17 02:31:24,543 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 396 transitions. Word has length 70 [2021-12-17 02:31:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:24,545 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 396 transitions. [2021-12-17 02:31:24,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 396 transitions. [2021-12-17 02:31:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:31:24,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:24,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:24,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:24,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:24,756 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 3 times [2021-12-17 02:31:24,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:24,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121571504] [2021-12-17 02:31:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:31:24,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:24,758 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) [2021-12-17 02:31:24,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 02:31:24,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 02:31:24,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:31:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 02:31:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:27,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:30,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121571504] [2021-12-17 02:31:30,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121571504] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:30,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:30,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-12-17 02:31:30,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180415188] [2021-12-17 02:31:30,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:30,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 02:31:30,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 02:31:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 02:31:30,122 INFO L87 Difference]: Start difference. First operand 282 states and 396 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:43,295 INFO L93 Difference]: Finished difference Result 1658 states and 2264 transitions. [2021-12-17 02:31:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 02:31:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 02:31:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:43,301 INFO L225 Difference]: With dead ends: 1658 [2021-12-17 02:31:43,302 INFO L226 Difference]: Without dead ends: 1552 [2021-12-17 02:31:43,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2492, Invalid=12028, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 02:31:43,307 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 2569 mSDsluCounter, 7453 mSDsCounter, 0 mSdLazyCounter, 4632 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 7866 SdHoareTripleChecker+Invalid, 4983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 4632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:43,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2569 Valid, 7866 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 4632 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-17 02:31:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-12-17 02:31:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 628. [2021-12-17 02:31:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.4322169059011165) internal successors, (898), 627 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 898 transitions. [2021-12-17 02:31:43,344 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 898 transitions. Word has length 70 [2021-12-17 02:31:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:43,345 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 898 transitions. [2021-12-17 02:31:43,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 898 transitions. [2021-12-17 02:31:43,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:31:43,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:43,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:43,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:43,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:43,556 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash 703065260, now seen corresponding path program 1 times [2021-12-17 02:31:43,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:43,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966702070] [2021-12-17 02:31:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:43,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:43,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:31:43,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 02:31:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:43,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:31:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 02:31:43,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 02:31:43,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:43,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966702070] [2021-12-17 02:31:43,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966702070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:43,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:43,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-12-17 02:31:43,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979439426] [2021-12-17 02:31:43,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:43,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:31:43,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:43,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:31:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:43,911 INFO L87 Difference]: Start difference. First operand 628 states and 898 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:44,083 INFO L93 Difference]: Finished difference Result 1259 states and 1812 transitions. [2021-12-17 02:31:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:31:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 02:31:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:44,086 INFO L225 Difference]: With dead ends: 1259 [2021-12-17 02:31:44,086 INFO L226 Difference]: Without dead ends: 664 [2021-12-17 02:31:44,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:44,087 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:44,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 186 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-12-17 02:31:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-17 02:31:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 527. [2021-12-17 02:31:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3954372623574145) internal successors, (734), 526 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 734 transitions. [2021-12-17 02:31:44,111 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 734 transitions. Word has length 70 [2021-12-17 02:31:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:44,111 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 734 transitions. [2021-12-17 02:31:44,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 734 transitions. [2021-12-17 02:31:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:31:44,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:44,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:31:44,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-17 02:31:44,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:44,322 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash -247756884, now seen corresponding path program 1 times [2021-12-17 02:31:44,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:44,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485694188] [2021-12-17 02:31:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:44,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:44,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:44,324 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) [2021-12-17 02:31:44,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 02:31:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:31:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-17 02:31:44,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:31:44,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485694188] [2021-12-17 02:31:44,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485694188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:31:44,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:31:44,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:31:44,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714755323] [2021-12-17 02:31:44,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:31:44,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:31:44,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:44,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:31:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:44,518 INFO L87 Difference]: Start difference. First operand 527 states and 734 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:44,693 INFO L93 Difference]: Finished difference Result 1088 states and 1520 transitions. [2021-12-17 02:31:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:31:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 02:31:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:44,696 INFO L225 Difference]: With dead ends: 1088 [2021-12-17 02:31:44,697 INFO L226 Difference]: Without dead ends: 914 [2021-12-17 02:31:44,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:31:44,698 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 117 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:44,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 341 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-12-17 02:31:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-12-17 02:31:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 521. [2021-12-17 02:31:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.4) internal successors, (728), 520 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 728 transitions. [2021-12-17 02:31:44,720 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 728 transitions. Word has length 70 [2021-12-17 02:31:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:44,720 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 728 transitions. [2021-12-17 02:31:44,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 728 transitions. [2021-12-17 02:31:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 02:31:44,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:44,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1] [2021-12-17 02:31:44,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-17 02:31:44,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:44,931 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash 946149333, now seen corresponding path program 1 times [2021-12-17 02:31:44,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:44,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958007192] [2021-12-17 02:31:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:44,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:44,933 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) [2021-12-17 02:31:44,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 02:31:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:44,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 02:31:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 63 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:31:45,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:31:45,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:45,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958007192] [2021-12-17 02:31:45,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958007192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:45,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:45,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 02:31:45,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767120512] [2021-12-17 02:31:45,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:45,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:31:45,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:45,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:31:45,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:31:45,449 INFO L87 Difference]: Start difference. First operand 521 states and 728 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:45,598 INFO L93 Difference]: Finished difference Result 767 states and 1055 transitions. [2021-12-17 02:31:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:31:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-17 02:31:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:45,605 INFO L225 Difference]: With dead ends: 767 [2021-12-17 02:31:45,606 INFO L226 Difference]: Without dead ends: 593 [2021-12-17 02:31:45,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:31:45,607 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 78 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:45,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 145 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2021-12-17 02:31:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-17 02:31:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 584. [2021-12-17 02:31:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.3619210977701544) internal successors, (794), 583 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 794 transitions. [2021-12-17 02:31:45,637 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 794 transitions. Word has length 72 [2021-12-17 02:31:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:45,638 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 794 transitions. [2021-12-17 02:31:45,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 794 transitions. [2021-12-17 02:31:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 02:31:45,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:45,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1] [2021-12-17 02:31:45,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:45,848 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1891529833, now seen corresponding path program 1 times [2021-12-17 02:31:45,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:45,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190869750] [2021-12-17 02:31:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:45,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:45,850 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) [2021-12-17 02:31:45,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-17 02:31:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:45,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:31:45,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 63 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:31:46,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:31:46,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:46,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190869750] [2021-12-17 02:31:46,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190869750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:46,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:46,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-17 02:31:46,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331975860] [2021-12-17 02:31:46,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:46,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:31:46,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:31:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:31:46,430 INFO L87 Difference]: Start difference. First operand 584 states and 794 transitions. Second operand has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:31:46,627 INFO L93 Difference]: Finished difference Result 859 states and 1173 transitions. [2021-12-17 02:31:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:31:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-17 02:31:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:31:46,630 INFO L225 Difference]: With dead ends: 859 [2021-12-17 02:31:46,630 INFO L226 Difference]: Without dead ends: 685 [2021-12-17 02:31:46,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:31:46,631 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 186 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:31:46,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 195 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 284 Invalid, 0 Unknown, 270 Unchecked, 0.2s Time] [2021-12-17 02:31:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-12-17 02:31:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 623. [2021-12-17 02:31:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.342443729903537) internal successors, (835), 622 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 835 transitions. [2021-12-17 02:31:46,676 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 835 transitions. Word has length 73 [2021-12-17 02:31:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:31:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 835 transitions. [2021-12-17 02:31:46,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:31:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 835 transitions. [2021-12-17 02:31:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 02:31:46,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:31:46,678 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2021-12-17 02:31:46,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-17 02:31:46,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:31:46,887 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:31:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:31:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1135042114, now seen corresponding path program 1 times [2021-12-17 02:31:46,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:31:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517787727] [2021-12-17 02:31:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:31:46,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:31:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:31:46,889 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) [2021-12-17 02:31:46,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-17 02:31:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:31:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 02:31:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:31:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:49,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:31:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:31:52,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:31:52,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517787727] [2021-12-17 02:31:52,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517787727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:31:52,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:31:52,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-12-17 02:31:52,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821703434] [2021-12-17 02:31:52,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:31:52,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 02:31:52,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:31:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 02:31:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 02:31:52,168 INFO L87 Difference]: Start difference. First operand 623 states and 835 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:32:33,389 INFO L93 Difference]: Finished difference Result 3653 states and 4842 transitions. [2021-12-17 02:32:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-12-17 02:32:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-17 02:32:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:32:33,399 INFO L225 Difference]: With dead ends: 3653 [2021-12-17 02:32:33,399 INFO L226 Difference]: Without dead ends: 3455 [2021-12-17 02:32:33,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18996 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=7889, Invalid=52381, Unknown=0, NotChecked=0, Total=60270 [2021-12-17 02:32:33,411 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 2686 mSDsluCounter, 15922 mSDsCounter, 0 mSdLazyCounter, 9999 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2686 SdHoareTripleChecker+Valid, 16645 SdHoareTripleChecker+Invalid, 10694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 9999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:32:33,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2686 Valid, 16645 Invalid, 10694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 9999 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-12-17 02:32:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2021-12-17 02:32:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 1678. [2021-12-17 02:32:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 1.3953488372093024) internal successors, (2340), 1677 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2340 transitions. [2021-12-17 02:32:33,495 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2340 transitions. Word has length 74 [2021-12-17 02:32:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:32:33,495 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 2340 transitions. [2021-12-17 02:32:33,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2340 transitions. [2021-12-17 02:32:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 02:32:33,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:32:33,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:32:33,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-17 02:32:33,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:32:33,707 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:32:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:32:33,709 INFO L85 PathProgramCache]: Analyzing trace with hash -777616002, now seen corresponding path program 1 times [2021-12-17 02:32:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:32:33,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288850416] [2021-12-17 02:32:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:32:33,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:32:33,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:32:33,711 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) [2021-12-17 02:32:33,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-17 02:32:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:32:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 02:32:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:32:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:32:36,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:32:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:32:38,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:32:38,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288850416] [2021-12-17 02:32:38,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288850416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:32:38,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:32:38,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-12-17 02:32:38,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518426697] [2021-12-17 02:32:38,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:32:38,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 02:32:38,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:32:38,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 02:32:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 02:32:38,569 INFO L87 Difference]: Start difference. First operand 1678 states and 2340 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:32:57,762 INFO L93 Difference]: Finished difference Result 4586 states and 6285 transitions. [2021-12-17 02:32:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-17 02:32:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-17 02:32:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:32:57,772 INFO L225 Difference]: With dead ends: 4586 [2021-12-17 02:32:57,773 INFO L226 Difference]: Without dead ends: 3504 [2021-12-17 02:32:57,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5464 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=2769, Invalid=19283, Unknown=0, NotChecked=0, Total=22052 [2021-12-17 02:32:57,777 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 1695 mSDsluCounter, 9698 mSDsCounter, 0 mSdLazyCounter, 5944 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 10188 SdHoareTripleChecker+Invalid, 6261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 5944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:32:57,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1695 Valid, 10188 Invalid, 6261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 5944 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 02:32:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-12-17 02:32:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 1910. [2021-12-17 02:32:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 1.4044002095337873) internal successors, (2681), 1909 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2681 transitions. [2021-12-17 02:32:57,880 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2681 transitions. Word has length 74 [2021-12-17 02:32:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:32:57,881 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 2681 transitions. [2021-12-17 02:32:57,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2681 transitions. [2021-12-17 02:32:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 02:32:57,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:32:57,884 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-12-17 02:32:57,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-17 02:32:58,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:32:58,092 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:32:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:32:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1420916641, now seen corresponding path program 1 times [2021-12-17 02:32:58,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:32:58,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381091876] [2021-12-17 02:32:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:32:58,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:32:58,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:32:58,094 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:32:58,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-17 02:32:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:32:58,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:32:58,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:32:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 29 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:32:58,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:32:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 29 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:32:58,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:32:58,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381091876] [2021-12-17 02:32:58,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381091876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:32:58,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:32:58,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-17 02:32:58,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365653758] [2021-12-17 02:32:58,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:32:58,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:32:58,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:32:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:32:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:32:58,551 INFO L87 Difference]: Start difference. First operand 1910 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:58,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:32:58,971 INFO L93 Difference]: Finished difference Result 4790 states and 6865 transitions. [2021-12-17 02:32:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 02:32:58,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-17 02:32:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:32:58,978 INFO L225 Difference]: With dead ends: 4790 [2021-12-17 02:32:58,978 INFO L226 Difference]: Without dead ends: 3016 [2021-12-17 02:32:58,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-17 02:32:58,980 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:32:58,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 192 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 348 Invalid, 0 Unknown, 197 Unchecked, 0.2s Time] [2021-12-17 02:32:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-12-17 02:32:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2815. [2021-12-17 02:32:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2814 states have (on average 1.396588486140725) internal successors, (3930), 2814 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3930 transitions. [2021-12-17 02:32:59,120 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3930 transitions. Word has length 76 [2021-12-17 02:32:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:32:59,120 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 3930 transitions. [2021-12-17 02:32:59,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:32:59,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3930 transitions. [2021-12-17 02:32:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 02:32:59,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:32:59,127 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:32:59,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-17 02:32:59,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:32:59,336 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:32:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:32:59,336 INFO L85 PathProgramCache]: Analyzing trace with hash 881251465, now seen corresponding path program 1 times [2021-12-17 02:32:59,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:32:59,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353476628] [2021-12-17 02:32:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:32:59,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:32:59,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:32:59,337 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:32:59,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-17 02:32:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:32:59,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 02:32:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:33:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:33:02,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:33:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:33:06,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:33:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353476628] [2021-12-17 02:33:06,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353476628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:33:06,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:33:06,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-17 02:33:06,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097259841] [2021-12-17 02:33:06,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:33:06,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 02:33:06,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:33:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 02:33:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2277, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 02:33:06,035 INFO L87 Difference]: Start difference. First operand 2815 states and 3930 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:33:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:33:58,395 INFO L93 Difference]: Finished difference Result 6276 states and 8378 transitions. [2021-12-17 02:33:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-12-17 02:33:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 02:33:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:33:58,410 INFO L225 Difference]: With dead ends: 6276 [2021-12-17 02:33:58,410 INFO L226 Difference]: Without dead ends: 5941 [2021-12-17 02:33:58,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18395 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=8158, Invalid=51622, Unknown=0, NotChecked=0, Total=59780 [2021-12-17 02:33:58,417 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 2434 mSDsluCounter, 14343 mSDsCounter, 0 mSdLazyCounter, 9107 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 14821 SdHoareTripleChecker+Invalid, 9760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 9107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:33:58,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 14821 Invalid, 9760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 9107 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-12-17 02:33:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-12-17 02:33:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 4237. [2021-12-17 02:33:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 1.4048630783758262) internal successors, (5951), 4236 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:33:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 5951 transitions. [2021-12-17 02:33:58,636 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 5951 transitions. Word has length 77 [2021-12-17 02:33:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:33:58,636 INFO L470 AbstractCegarLoop]: Abstraction has 4237 states and 5951 transitions. [2021-12-17 02:33:58,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:33:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 5951 transitions. [2021-12-17 02:33:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 02:33:58,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:33:58,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:33:58,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-17 02:33:58,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:33:58,850 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:33:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:33:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1269946569, now seen corresponding path program 2 times [2021-12-17 02:33:58,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:33:58,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127946335] [2021-12-17 02:33:58,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:33:58,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:33:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:33:58,852 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:33:58,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-17 02:33:58,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:33:58,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:33:58,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 02:33:58,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:34:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:34:02,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:34:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:34:05,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:34:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127946335] [2021-12-17 02:34:05,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127946335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:34:05,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:34:05,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-17 02:34:05,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503049890] [2021-12-17 02:34:05,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:34:05,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 02:34:05,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:34:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 02:34:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 02:34:05,242 INFO L87 Difference]: Start difference. First operand 4237 states and 5951 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:35:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:35:24,662 INFO L93 Difference]: Finished difference Result 11200 states and 15169 transitions. [2021-12-17 02:35:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-12-17 02:35:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 02:35:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:35:24,687 INFO L225 Difference]: With dead ends: 11200 [2021-12-17 02:35:24,688 INFO L226 Difference]: Without dead ends: 9762 [2021-12-17 02:35:24,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39475 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=12248, Invalid=97644, Unknown=0, NotChecked=0, Total=109892 [2021-12-17 02:35:24,698 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 3080 mSDsluCounter, 17731 mSDsCounter, 0 mSdLazyCounter, 11174 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3080 SdHoareTripleChecker+Valid, 18524 SdHoareTripleChecker+Invalid, 12079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 11174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:35:24,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3080 Valid, 18524 Invalid, 12079 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [905 Valid, 11174 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2021-12-17 02:35:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9762 states. [2021-12-17 02:35:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9762 to 6289. [2021-12-17 02:35:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 6288 states have (on average 1.4258905852417303) internal successors, (8966), 6288 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:35:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 8966 transitions. [2021-12-17 02:35:25,017 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 8966 transitions. Word has length 77 [2021-12-17 02:35:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:35:25,017 INFO L470 AbstractCegarLoop]: Abstraction has 6289 states and 8966 transitions. [2021-12-17 02:35:25,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:35:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 8966 transitions. [2021-12-17 02:35:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 02:35:25,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:35:25,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:35:25,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-17 02:35:25,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:35:25,231 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:35:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:35:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1690097737, now seen corresponding path program 3 times [2021-12-17 02:35:25,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:35:25,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147914031] [2021-12-17 02:35:25,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:35:25,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:35:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:35:25,232 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:35:25,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-17 02:35:25,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 02:35:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:35:25,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 02:35:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:35:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:35:28,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:35:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:35:31,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:35:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147914031] [2021-12-17 02:35:31,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147914031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:35:31,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:35:31,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-12-17 02:35:31,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459365850] [2021-12-17 02:35:31,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:35:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 02:35:31,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:35:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 02:35:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 02:35:31,846 INFO L87 Difference]: Start difference. First operand 6289 states and 8966 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:36:28,378 INFO L93 Difference]: Finished difference Result 16257 states and 22622 transitions. [2021-12-17 02:36:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2021-12-17 02:36:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 02:36:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:36:28,398 INFO L225 Difference]: With dead ends: 16257 [2021-12-17 02:36:28,398 INFO L226 Difference]: Without dead ends: 12746 [2021-12-17 02:36:28,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20977 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=9089, Invalid=55173, Unknown=0, NotChecked=0, Total=64262 [2021-12-17 02:36:28,406 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 2711 mSDsluCounter, 14240 mSDsCounter, 0 mSdLazyCounter, 9076 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2711 SdHoareTripleChecker+Valid, 14812 SdHoareTripleChecker+Invalid, 9729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 9076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:36:28,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2711 Valid, 14812 Invalid, 9729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 9076 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-12-17 02:36:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12746 states. [2021-12-17 02:36:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12746 to 9044. [2021-12-17 02:36:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9044 states, 9043 states have (on average 1.445759150724317) internal successors, (13074), 9043 states have internal predecessors, (13074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 13074 transitions. [2021-12-17 02:36:28,848 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 13074 transitions. Word has length 77 [2021-12-17 02:36:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:36:28,848 INFO L470 AbstractCegarLoop]: Abstraction has 9044 states and 13074 transitions. [2021-12-17 02:36:28,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 13074 transitions. [2021-12-17 02:36:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 02:36:28,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:36:28,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:36:28,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-17 02:36:29,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:36:29,064 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:36:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:36:29,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1471420594, now seen corresponding path program 1 times [2021-12-17 02:36:29,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:36:29,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296815954] [2021-12-17 02:36:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:36:29,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:36:29,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:36:29,065 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:36:29,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-17 02:36:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:36:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 02:36:29,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:36:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 76 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:36:29,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:36:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 02:36:29,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:36:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296815954] [2021-12-17 02:36:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296815954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:36:29,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:36:29,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 02:36:29,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958088599] [2021-12-17 02:36:29,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:36:29,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 02:36:29,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:36:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 02:36:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:36:29,585 INFO L87 Difference]: Start difference. First operand 9044 states and 13074 transitions. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:36:30,727 INFO L93 Difference]: Finished difference Result 22152 states and 32404 transitions. [2021-12-17 02:36:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 02:36:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-17 02:36:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:36:30,751 INFO L225 Difference]: With dead ends: 22152 [2021-12-17 02:36:30,751 INFO L226 Difference]: Without dead ends: 13265 [2021-12-17 02:36:30,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-12-17 02:36:30,760 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 477 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:36:30,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 422 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 605 Invalid, 0 Unknown, 457 Unchecked, 0.4s Time] [2021-12-17 02:36:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13265 states. [2021-12-17 02:36:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13265 to 12103. [2021-12-17 02:36:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12103 states, 12102 states have (on average 1.4367873078829945) internal successors, (17388), 12102 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12103 states to 12103 states and 17388 transitions. [2021-12-17 02:36:31,420 INFO L78 Accepts]: Start accepts. Automaton has 12103 states and 17388 transitions. Word has length 78 [2021-12-17 02:36:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:36:31,420 INFO L470 AbstractCegarLoop]: Abstraction has 12103 states and 17388 transitions. [2021-12-17 02:36:31,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 12103 states and 17388 transitions. [2021-12-17 02:36:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 02:36:31,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:36:31,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-17 02:36:31,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-17 02:36:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:36:31,639 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:36:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:36:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1964091451, now seen corresponding path program 1 times [2021-12-17 02:36:31,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:36:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532021998] [2021-12-17 02:36:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:36:31,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:36:31,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:36:31,641 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:36:31,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-17 02:36:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:36:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 02:36:31,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:36:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 65 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:36:32,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:36:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:36:32,859 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:36:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532021998] [2021-12-17 02:36:32,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532021998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:36:32,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:36:32,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-17 02:36:32,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098851862] [2021-12-17 02:36:32,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:36:32,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 02:36:32,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:36:32,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 02:36:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-12-17 02:36:32,861 INFO L87 Difference]: Start difference. First operand 12103 states and 17388 transitions. Second operand has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:36:34,001 INFO L93 Difference]: Finished difference Result 24485 states and 35214 transitions. [2021-12-17 02:36:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 02:36:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-17 02:36:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:36:34,022 INFO L225 Difference]: With dead ends: 24485 [2021-12-17 02:36:34,023 INFO L226 Difference]: Without dead ends: 12844 [2021-12-17 02:36:34,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 02:36:34,034 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 179 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:36:34,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 421 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 385 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2021-12-17 02:36:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-12-17 02:36:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 12706. [2021-12-17 02:36:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12706 states, 12705 states have (on average 1.4266824085005902) internal successors, (18126), 12705 states have internal predecessors, (18126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12706 states to 12706 states and 18126 transitions. [2021-12-17 02:36:34,655 INFO L78 Accepts]: Start accepts. Automaton has 12706 states and 18126 transitions. Word has length 79 [2021-12-17 02:36:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:36:34,655 INFO L470 AbstractCegarLoop]: Abstraction has 12706 states and 18126 transitions. [2021-12-17 02:36:34,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:36:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 12706 states and 18126 transitions. [2021-12-17 02:36:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 02:36:34,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:36:34,658 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:36:34,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-17 02:36:34,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:36:34,866 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:36:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:36:34,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1794630633, now seen corresponding path program 1 times [2021-12-17 02:36:34,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:36:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270477374] [2021-12-17 02:36:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:36:34,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:36:34,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:36:34,868 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:36:34,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-17 02:36:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:36:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 02:36:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:36:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:36:38,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:36:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:36:42,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:36:42,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270477374] [2021-12-17 02:36:42,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270477374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:36:42,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:36:42,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-17 02:36:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113438046] [2021-12-17 02:36:42,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:36:42,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 02:36:42,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:36:42,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 02:36:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 02:36:42,405 INFO L87 Difference]: Start difference. First operand 12706 states and 18126 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:39:24,051 INFO L93 Difference]: Finished difference Result 27873 states and 37398 transitions. [2021-12-17 02:39:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 407 states. [2021-12-17 02:39:24,052 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-17 02:39:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:39:24,087 INFO L225 Difference]: With dead ends: 27873 [2021-12-17 02:39:24,087 INFO L226 Difference]: Without dead ends: 27241 [2021-12-17 02:39:24,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 451 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81802 ImplicationChecksByTransitivity, 141.4s TimeCoverageRelationStatistics Valid=23545, Invalid=181211, Unknown=0, NotChecked=0, Total=204756 [2021-12-17 02:39:24,106 INFO L933 BasicCegarLoop]: 1009 mSDtfsCounter, 3753 mSDsluCounter, 27568 mSDsCounter, 0 mSdLazyCounter, 19841 mSolverCounterSat, 1368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3753 SdHoareTripleChecker+Valid, 28577 SdHoareTripleChecker+Invalid, 21209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1368 IncrementalHoareTripleChecker+Valid, 19841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:39:24,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3753 Valid, 28577 Invalid, 21209 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1368 Valid, 19841 Invalid, 0 Unknown, 0 Unchecked, 21.7s Time] [2021-12-17 02:39:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-12-17 02:39:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 17550. [2021-12-17 02:39:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17550 states, 17549 states have (on average 1.420935665849906) internal successors, (24936), 17549 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17550 states to 17550 states and 24936 transitions. [2021-12-17 02:39:25,003 INFO L78 Accepts]: Start accepts. Automaton has 17550 states and 24936 transitions. Word has length 80 [2021-12-17 02:39:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:39:25,004 INFO L470 AbstractCegarLoop]: Abstraction has 17550 states and 24936 transitions. [2021-12-17 02:39:25,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 17550 states and 24936 transitions. [2021-12-17 02:39:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 02:39:25,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:39:25,007 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:39:25,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-17 02:39:25,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:39:25,219 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:39:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:39:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1519845463, now seen corresponding path program 2 times [2021-12-17 02:39:25,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:39:25,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864852791] [2021-12-17 02:39:25,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:39:25,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:39:25,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:39:25,221 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:39:25,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-17 02:39:25,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:39:25,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:39:25,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 02:39:25,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:39:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:28,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:39:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:32,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:39:32,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864852791] [2021-12-17 02:39:32,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864852791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:39:32,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:39:32,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-17 02:39:32,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075627657] [2021-12-17 02:39:32,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:39:32,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 02:39:32,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:39:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 02:39:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 02:39:32,637 INFO L87 Difference]: Start difference. First operand 17550 states and 24936 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:42:11,063 INFO L93 Difference]: Finished difference Result 44306 states and 60361 transitions. [2021-12-17 02:42:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2021-12-17 02:42:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-17 02:42:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:42:11,103 INFO L225 Difference]: With dead ends: 44306 [2021-12-17 02:42:11,103 INFO L226 Difference]: Without dead ends: 36661 [2021-12-17 02:42:11,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84170 ImplicationChecksByTransitivity, 140.3s TimeCoverageRelationStatistics Valid=21067, Invalid=188239, Unknown=0, NotChecked=0, Total=209306 [2021-12-17 02:42:11,120 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 3710 mSDsluCounter, 25261 mSDsCounter, 0 mSdLazyCounter, 17120 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3710 SdHoareTripleChecker+Valid, 26384 SdHoareTripleChecker+Invalid, 18293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 17120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:42:11,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3710 Valid, 26384 Invalid, 18293 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1173 Valid, 17120 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2021-12-17 02:42:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36661 states. [2021-12-17 02:42:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36661 to 23826. [2021-12-17 02:42:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23826 states, 23825 states have (on average 1.4362224554039875) internal successors, (34218), 23825 states have internal predecessors, (34218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23826 states to 23826 states and 34218 transitions. [2021-12-17 02:42:12,344 INFO L78 Accepts]: Start accepts. Automaton has 23826 states and 34218 transitions. Word has length 80 [2021-12-17 02:42:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:42:12,344 INFO L470 AbstractCegarLoop]: Abstraction has 23826 states and 34218 transitions. [2021-12-17 02:42:12,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23826 states and 34218 transitions. [2021-12-17 02:42:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 02:42:12,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:42:12,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 02:42:12,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-17 02:42:12,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:42:12,548 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:42:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:42:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash -825823845, now seen corresponding path program 3 times [2021-12-17 02:42:12,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:42:12,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697055600] [2021-12-17 02:42:12,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:42:12,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:42:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:42:12,549 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:42:12,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-17 02:42:12,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 02:42:12,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:42:12,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 02:42:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:42:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:42:15,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:42:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:42:19,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:42:19,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697055600] [2021-12-17 02:42:19,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697055600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:42:19,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:42:19,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-17 02:42:19,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940997170] [2021-12-17 02:42:19,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:42:19,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 02:42:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:42:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 02:42:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 02:42:19,759 INFO L87 Difference]: Start difference. First operand 23826 states and 34218 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15