./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/num_conversion_2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:39:19,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:39:19,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:39:19,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:39:19,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:39:19,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:39:19,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:39:19,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:39:19,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:39:20,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:39:20,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:39:20,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:39:20,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:39:20,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:39:20,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:39:20,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:39:20,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:39:20,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:39:20,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:39:20,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:39:20,021 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:39:20,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:39:20,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:39:20,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:39:20,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:39:20,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:39:20,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:39:20,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:39:20,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:39:20,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:39:20,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:39:20,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:39:20,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:39:20,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:39:20,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:39:20,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:39:20,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:39:20,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:39:20,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:39:20,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:39:20,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:39:20,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:39:20,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:39:20,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:39:20,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:39:20,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:39:20,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:39:20,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:39:20,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:39:20,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:39:20,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:39:20,073 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:39:20,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:39:20,075 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:39:20,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:39:20,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:39:20,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:39:20,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:39:20,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:39:20,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:39:20,076 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:39:20,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:39:20,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:39:20,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:39:20,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:39:20,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:39:20,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:39:20,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:39:20,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:39:20,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:39:20,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:39:20,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:39:20,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:39:20,078 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:39:20,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:39:20,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:39:20,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2022-07-11 23:39:20,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:39:20,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:39:20,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:39:20,317 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:39:20,318 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:39:20,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-11 23:39:20,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab77ea59d/320fcb93aec74fe29120bf6374c30108/FLAGd29d4bfcf [2022-07-11 23:39:20,780 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:39:20,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-11 23:39:20,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab77ea59d/320fcb93aec74fe29120bf6374c30108/FLAGd29d4bfcf [2022-07-11 23:39:20,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab77ea59d/320fcb93aec74fe29120bf6374c30108 [2022-07-11 23:39:20,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:39:20,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:39:20,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:39:20,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:39:20,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:39:20,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:39:20" (1/1) ... [2022-07-11 23:39:20,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436511bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:20, skipping insertion in model container [2022-07-11 23:39:20,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:39:20" (1/1) ... [2022-07-11 23:39:20,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:39:20,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:39:20,957 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/num_conversion_2.c[685,698] [2022-07-11 23:39:20,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:39:20,984 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:39:20,996 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/num_conversion_2.c[685,698] [2022-07-11 23:39:21,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:39:21,027 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:39:21,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21 WrapperNode [2022-07-11 23:39:21,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:39:21,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:39:21,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:39:21,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:39:21,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,066 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-07-11 23:39:21,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:39:21,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:39:21,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:39:21,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:39:21,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:39:21,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:39:21,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:39:21,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:39:21,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (1/1) ... [2022-07-11 23:39:21,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:39:21,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:39:21,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:39:21,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:39:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:39:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:39:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:39:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:39:21,223 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:39:21,224 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:39:21,364 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:39:21,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:39:21,369 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:39:21,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:39:21 BoogieIcfgContainer [2022-07-11 23:39:21,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:39:21,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:39:21,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:39:21,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:39:21,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:39:20" (1/3) ... [2022-07-11 23:39:21,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f240b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:39:21, skipping insertion in model container [2022-07-11 23:39:21,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:21" (2/3) ... [2022-07-11 23:39:21,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f240b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:39:21, skipping insertion in model container [2022-07-11 23:39:21,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:39:21" (3/3) ... [2022-07-11 23:39:21,383 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2022-07-11 23:39:21,394 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:39:21,395 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:39:21,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:39:21,461 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8c8fd19, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1638a552 [2022-07-11 23:39:21,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:39:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-11 23:39:21,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:21,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-11 23:39:21,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:21,479 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-11 23:39:21,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:39:21,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846938557] [2022-07-11 23:39:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:39:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:21,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:39:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846938557] [2022-07-11 23:39:21,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846938557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:39:21,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:39:21,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:39:21,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22830048] [2022-07-11 23:39:21,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:39:21,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:39:21,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:39:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:39:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:39:21,638 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:21,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:21,648 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-11 23:39:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:39:21,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-11 23:39:21,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:21,663 INFO L225 Difference]: With dead ends: 21 [2022-07-11 23:39:21,663 INFO L226 Difference]: Without dead ends: 9 [2022-07-11 23:39:21,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:39:21,670 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:21,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:39:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-11 23:39:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-11 23:39:21,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-11 23:39:21,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-11 23:39:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:21,697 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-11 23:39:21,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-11 23:39:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-11 23:39:21,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:21,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-11 23:39:21,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:39:21,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-11 23:39:21,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:39:21,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834556202] [2022-07-11 23:39:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:21,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:39:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:21,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:39:21,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834556202] [2022-07-11 23:39:21,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834556202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:39:21,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:39:21,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:39:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189202923] [2022-07-11 23:39:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:39:21,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:39:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:39:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:39:21,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:39:21,798 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:21,809 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-07-11 23:39:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:39:21,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-11 23:39:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:21,811 INFO L225 Difference]: With dead ends: 16 [2022-07-11 23:39:21,811 INFO L226 Difference]: Without dead ends: 12 [2022-07-11 23:39:21,811 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:39:21,812 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:21,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:39:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-11 23:39:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2022-07-11 23:39:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-11 23:39:21,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-07-11 23:39:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:21,816 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-11 23:39:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-11 23:39:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-11 23:39:21,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:21,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:39:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:39:21,818 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-07-11 23:39:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:39:21,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888329988] [2022-07-11 23:39:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:39:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:21,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:39:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888329988] [2022-07-11 23:39:21,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888329988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:39:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103162998] [2022-07-11 23:39:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:21,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:39:21,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:39:21,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:39:21,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:39:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 23:39:21,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:21,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:39:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:22,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103162998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:39:22,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:39:22,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-07-11 23:39:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352652355] [2022-07-11 23:39:22,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:39:22,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:39:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:39:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:39:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:39:22,061 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:22,122 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-07-11 23:39:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:39:22,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-11 23:39:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:22,123 INFO L225 Difference]: With dead ends: 23 [2022-07-11 23:39:22,123 INFO L226 Difference]: Without dead ends: 19 [2022-07-11 23:39:22,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:39:22,125 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:22,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:39:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-11 23:39:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-11 23:39:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-11 23:39:22,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-07-11 23:39:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:22,133 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-11 23:39:22,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-11 23:39:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 23:39:22,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:22,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-11 23:39:22,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:39:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:39:22,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-07-11 23:39:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:39:22,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956856646] [2022-07-11 23:39:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:39:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:22,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:39:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956856646] [2022-07-11 23:39:22,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956856646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:39:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970250936] [2022-07-11 23:39:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:39:22,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:39:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:39:22,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:39:22,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:39:22,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:39:22,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:39:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 23:39:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:22,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:39:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:22,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970250936] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:39:22,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:39:22,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-07-11 23:39:22,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659752914] [2022-07-11 23:39:22,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:39:22,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 23:39:22,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:39:22,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 23:39:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:39:22,985 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2022-07-11 23:39:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:23,423 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-07-11 23:39:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:39:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 18 [2022-07-11 23:39:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:23,424 INFO L225 Difference]: With dead ends: 41 [2022-07-11 23:39:23,425 INFO L226 Difference]: Without dead ends: 37 [2022-07-11 23:39:23,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:39:23,426 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:23,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:39:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-11 23:39:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-11 23:39:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-11 23:39:23,440 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2022-07-11 23:39:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:23,440 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-11 23:39:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2022-07-11 23:39:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-11 23:39:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:39:23,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:23,442 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-11 23:39:23,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:39:23,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 23:39:23,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2022-07-11 23:39:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:39:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254543232] [2022-07-11 23:39:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:39:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-11 23:39:23,785 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-11 23:39:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-11 23:39:23,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-11 23:39:23,884 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-11 23:39:23,887 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-11 23:39:23,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:39:23,892 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-07-11 23:39:23,897 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-11 23:39:23,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.07 11:39:23 BoogieIcfgContainer [2022-07-11 23:39:23,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-11 23:39:23,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-11 23:39:23,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-11 23:39:23,947 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-11 23:39:23,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:39:21" (3/4) ... [2022-07-11 23:39:23,950 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-11 23:39:23,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-11 23:39:23,951 INFO L158 Benchmark]: Toolchain (without parser) took 3145.73ms. Allocated memory is still 107.0MB. Free memory was 72.2MB in the beginning and 58.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2022-07-11 23:39:23,951 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 81.8MB. Free memory was 51.8MB in the beginning and 51.7MB in the end (delta: 30.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 23:39:23,951 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.11ms. Allocated memory is still 107.0MB. Free memory was 71.9MB in the beginning and 83.0MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-11 23:39:23,952 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.48ms. Allocated memory is still 107.0MB. Free memory was 82.5MB in the beginning and 81.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-11 23:39:23,952 INFO L158 Benchmark]: Boogie Preprocessor took 29.53ms. Allocated memory is still 107.0MB. Free memory was 81.4MB in the beginning and 80.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 23:39:23,952 INFO L158 Benchmark]: RCFGBuilder took 278.64ms. Allocated memory is still 107.0MB. Free memory was 80.4MB in the beginning and 70.9MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-11 23:39:23,953 INFO L158 Benchmark]: TraceAbstraction took 2569.61ms. Allocated memory is still 107.0MB. Free memory was 70.4MB in the beginning and 59.3MB in the end (delta: 11.1MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2022-07-11 23:39:23,953 INFO L158 Benchmark]: Witness Printer took 3.10ms. Allocated memory is still 107.0MB. Free memory was 59.3MB in the beginning and 58.7MB in the end (delta: 624.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 23:39:23,955 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 81.8MB. Free memory was 51.8MB in the beginning and 51.7MB in the end (delta: 30.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.11ms. Allocated memory is still 107.0MB. Free memory was 71.9MB in the beginning and 83.0MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.48ms. Allocated memory is still 107.0MB. Free memory was 82.5MB in the beginning and 81.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.53ms. Allocated memory is still 107.0MB. Free memory was 81.4MB in the beginning and 80.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 278.64ms. Allocated memory is still 107.0MB. Free memory was 80.4MB in the beginning and 70.9MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2569.61ms. Allocated memory is still 107.0MB. Free memory was 70.4MB in the beginning and 59.3MB in the end (delta: 11.1MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * Witness Printer took 3.10ms. Allocated memory is still 107.0MB. Free memory was 59.3MB in the beginning and 58.7MB in the end (delta: 624.4kB). 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: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=0, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=0, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=1, i=5, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=1, i=5, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, i=5, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=2, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=2, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=3, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=3, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=4, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=4, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=5, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=5, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=6, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=6, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=6, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=7, i=4, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=7, i=4, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, i=4, x=6, y=0] [L30] COND FALSE !(c < (unsigned char)8) VAL [bit=0, c=8, i=4, x=6, y=0] [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 153 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 104 IncrementalHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 47 mSDtfsCounter, 104 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 606 SizeOfPredicates, 6 NumberOfNonLiveVariables, 109 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/69 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 [2022-07-11 23:39:23,991 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/num_conversion_2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:39:25,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:39:25,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:39:25,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:39:25,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:39:25,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:39:25,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:39:25,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:39:25,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:39:25,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:39:25,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:39:25,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:39:25,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:39:25,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:39:25,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:39:25,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:39:25,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:39:25,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:39:25,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:39:25,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:39:25,977 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:39:25,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:39:25,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:39:25,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:39:25,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:39:25,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:39:25,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:39:25,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:39:25,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:39:25,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:39:25,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:39:25,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:39:25,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:39:25,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:39:25,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:39:25,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:39:25,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:39:25,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:39:25,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:39:25,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:39:25,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:39:25,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:39:25,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-11 23:39:26,031 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:39:26,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:39:26,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:39:26,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:39:26,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:39:26,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:39:26,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:39:26,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:39:26,034 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:39:26,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:39:26,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:39:26,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:39:26,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:39:26,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:39:26,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:39:26,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:39:26,036 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-11 23:39:26,036 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-11 23:39:26,037 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-11 23:39:26,037 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:39:26,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:39:26,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:39:26,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:39:26,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:39:26,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:39:26,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:39:26,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:39:26,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:39:26,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:39:26,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:39:26,039 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-11 23:39:26,039 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-11 23:39:26,039 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:39:26,039 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:39:26,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:39:26,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-11 23:39:26,040 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2022-07-11 23:39:26,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:39:26,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:39:26,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:39:26,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:39:26,377 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:39:26,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-11 23:39:26,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f4ebd18/8285e60e419a4973aa1aeb8361574614/FLAGb0d7ba9f5 [2022-07-11 23:39:26,838 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:39:26,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-11 23:39:26,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f4ebd18/8285e60e419a4973aa1aeb8361574614/FLAGb0d7ba9f5 [2022-07-11 23:39:27,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f4ebd18/8285e60e419a4973aa1aeb8361574614 [2022-07-11 23:39:27,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:39:27,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:39:27,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:39:27,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:39:27,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:39:27,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da6fe8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27, skipping insertion in model container [2022-07-11 23:39:27,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:39:27,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:39:27,390 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/num_conversion_2.c[685,698] [2022-07-11 23:39:27,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:39:27,410 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:39:27,420 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/num_conversion_2.c[685,698] [2022-07-11 23:39:27,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:39:27,434 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:39:27,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27 WrapperNode [2022-07-11 23:39:27,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:39:27,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:39:27,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:39:27,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:39:27,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,494 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-07-11 23:39:27,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:39:27,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:39:27,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:39:27,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:39:27,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:39:27,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:39:27,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:39:27,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:39:27,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (1/1) ... [2022-07-11 23:39:27,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:39:27,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:39:27,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:39:27,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:39:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:39:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:39:27,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:39:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-11 23:39:27,668 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:39:27,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:39:27,806 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:39:27,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:39:27,820 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:39:27,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:39:27 BoogieIcfgContainer [2022-07-11 23:39:27,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:39:27,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:39:27,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:39:27,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:39:27,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:39:27" (1/3) ... [2022-07-11 23:39:27,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31eedc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:39:27, skipping insertion in model container [2022-07-11 23:39:27,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:39:27" (2/3) ... [2022-07-11 23:39:27,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31eedc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:39:27, skipping insertion in model container [2022-07-11 23:39:27,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:39:27" (3/3) ... [2022-07-11 23:39:27,828 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2022-07-11 23:39:27,840 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:39:27,840 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:39:27,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:39:27,903 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@b53bf4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9badf57 [2022-07-11 23:39:27,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:39:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-11 23:39:27,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:27,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-11 23:39:27,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-11 23:39:27,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:39:27,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927408558] [2022-07-11 23:39:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:39:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:39:27,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:39:28,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-11 23:39:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:28,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-11 23:39:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:28,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:39:28,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:39:28,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927408558] [2022-07-11 23:39:28,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927408558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:39:28,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:39:28,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:39:28,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647578447] [2022-07-11 23:39:28,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:39:28,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:39:28,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:39:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:39:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:39:28,105 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:28,116 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-11 23:39:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:39:28,129 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-11 23:39:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:28,135 INFO L225 Difference]: With dead ends: 21 [2022-07-11 23:39:28,135 INFO L226 Difference]: Without dead ends: 9 [2022-07-11 23:39:28,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:39:28,141 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:28,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:39:28,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-11 23:39:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-11 23:39:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-11 23:39:28,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-11 23:39:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:28,168 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-11 23:39:28,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-11 23:39:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-11 23:39:28,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:28,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-11 23:39:28,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-11 23:39:28,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:39:28,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-11 23:39:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:39:28,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743001669] [2022-07-11 23:39:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:28,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:39:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:39:28,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:39:28,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-11 23:39:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:28,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:39:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:28,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:39:28,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:39:28,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743001669] [2022-07-11 23:39:28,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743001669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:39:28,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:39:28,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:39:28,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806479911] [2022-07-11 23:39:28,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:39:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:39:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:39:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:39:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:39:28,454 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:28,464 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-07-11 23:39:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:39:28,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-11 23:39:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:28,466 INFO L225 Difference]: With dead ends: 16 [2022-07-11 23:39:28,466 INFO L226 Difference]: Without dead ends: 12 [2022-07-11 23:39:28,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:39:28,468 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:28,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:39:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-11 23:39:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2022-07-11 23:39:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-11 23:39:28,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-07-11 23:39:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:28,472 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-11 23:39:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-11 23:39:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-11 23:39:28,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:28,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:39:28,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:39:28,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:39:28,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-07-11 23:39:28,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:39:28,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559965098] [2022-07-11 23:39:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:28,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:39:28,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:39:28,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:39:28,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-11 23:39:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:39:28,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:28,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:39:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:28,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:39:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559965098] [2022-07-11 23:39:28,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559965098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:39:28,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:39:28,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-11 23:39:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590242939] [2022-07-11 23:39:28,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:39:28,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:39:28,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:39:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:39:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:39:28,801 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:28,834 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-07-11 23:39:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:39:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-11 23:39:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:28,836 INFO L225 Difference]: With dead ends: 23 [2022-07-11 23:39:28,836 INFO L226 Difference]: Without dead ends: 19 [2022-07-11 23:39:28,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:39:28,837 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:28,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:39:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-11 23:39:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-11 23:39:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-11 23:39:28,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-07-11 23:39:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:28,843 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-11 23:39:28,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-11 23:39:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 23:39:28,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:28,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-11 23:39:28,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:39:29,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:39:29,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-07-11 23:39:29,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:39:29,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013100270] [2022-07-11 23:39:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:39:29,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:39:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:39:29,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:39:29,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-11 23:39:29,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:39:29,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:39:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:39:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:29,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:39:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:29,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:39:29,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013100270] [2022-07-11 23:39:29,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013100270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:39:29,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:39:29,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-11 23:39:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027206606] [2022-07-11 23:39:29,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:39:29,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:39:29,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:39:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:39:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:39:29,294 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2022-07-11 23:39:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:29,380 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-07-11 23:39:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:39:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 18 [2022-07-11 23:39:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:29,381 INFO L225 Difference]: With dead ends: 35 [2022-07-11 23:39:29,382 INFO L226 Difference]: Without dead ends: 31 [2022-07-11 23:39:29,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:39:29,383 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:29,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 82 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:39:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-11 23:39:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-11 23:39:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2022-07-11 23:39:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-11 23:39:29,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2022-07-11 23:39:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:29,390 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-11 23:39:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2022-07-11 23:39:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-11 23:39:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:39:29,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:29,392 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-11 23:39:29,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:39:29,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:39:29,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2022-07-11 23:39:29,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:39:29,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576112252] [2022-07-11 23:39:29,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:39:29,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:39:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:39:29,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:39:29,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-11 23:39:29,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-11 23:39:29,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:39:29,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 23:39:29,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:31,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:39:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:34,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:39:34,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576112252] [2022-07-11 23:39:34,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576112252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:39:34,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:39:34,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2022-07-11 23:39:34,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326260491] [2022-07-11 23:39:34,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:39:34,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-11 23:39:34,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:39:34,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-11 23:39:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2170, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 23:39:34,566 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:39:39,047 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-07-11 23:39:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-11 23:39:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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 30 [2022-07-11 23:39:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:39:39,050 INFO L225 Difference]: With dead ends: 96 [2022-07-11 23:39:39,051 INFO L226 Difference]: Without dead ends: 92 [2022-07-11 23:39:39,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1669, Invalid=5813, Unknown=0, NotChecked=0, Total=7482 [2022-07-11 23:39:39,054 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:39:39,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 165 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2022-07-11 23:39:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-11 23:39:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2022-07-11 23:39:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-07-11 23:39:39,064 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2022-07-11 23:39:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:39:39,065 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-07-11 23:39:39,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:39:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-07-11 23:39:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:39:39,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:39:39,066 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:39:39,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:39:39,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:39:39,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:39:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:39:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2022-07-11 23:39:39,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:39:39,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206233193] [2022-07-11 23:39:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:39:39,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:39:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:39:39,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:39:39,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-11 23:39:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:39:39,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-11 23:39:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:39:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:40,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:39:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:39:42,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:39:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206233193] [2022-07-11 23:39:42,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206233193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:39:42,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:39:42,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-11 23:39:42,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661066721] [2022-07-11 23:39:42,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:39:42,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:39:42,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:39:42,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:39:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:39:42,571 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:13,250 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2022-07-11 23:40:13,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-07-11 23:40:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:40:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:13,254 INFO L225 Difference]: With dead ends: 319 [2022-07-11 23:40:13,255 INFO L226 Difference]: Without dead ends: 285 [2022-07-11 23:40:13,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16710 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=7758, Invalid=41748, Unknown=0, NotChecked=0, Total=49506 [2022-07-11 23:40:13,266 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 277 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:40:13,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 115 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1598 Invalid, 0 Unknown, 136 Unchecked, 2.3s Time] [2022-07-11 23:40:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-11 23:40:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2022-07-11 23:40:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 159 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-07-11 23:40:13,317 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 30 [2022-07-11 23:40:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:13,318 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-07-11 23:40:13,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-07-11 23:40:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:40:13,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:13,320 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:40:13,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:13,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:40:13,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2022-07-11 23:40:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:40:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219740957] [2022-07-11 23:40:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:40:13,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:40:13,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:40:13,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:40:13,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-11 23:40:13,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:40:13,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:40:13,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-11 23:40:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:40:14,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:40:16,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:40:16,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219740957] [2022-07-11 23:40:16,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219740957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:16,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:40:16,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-11 23:40:16,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61403015] [2022-07-11 23:40:16,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:40:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:40:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:40:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:40:16,769 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:46,809 INFO L93 Difference]: Finished difference Result 395 states and 511 transitions. [2022-07-11 23:40:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-07-11 23:40:46,809 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:40:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:46,811 INFO L225 Difference]: With dead ends: 395 [2022-07-11 23:40:46,811 INFO L226 Difference]: Without dead ends: 338 [2022-07-11 23:40:46,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13552 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=5749, Invalid=34451, Unknown=0, NotChecked=0, Total=40200 [2022-07-11 23:40:46,815 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 277 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:40:46,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 134 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1687 Invalid, 0 Unknown, 105 Unchecked, 1.9s Time] [2022-07-11 23:40:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-11 23:40:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 184. [2022-07-11 23:40:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 247 transitions. [2022-07-11 23:40:46,858 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 247 transitions. Word has length 30 [2022-07-11 23:40:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:46,858 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 247 transitions. [2022-07-11 23:40:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 247 transitions. [2022-07-11 23:40:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:40:46,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:46,860 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:40:46,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:47,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:40:47,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2022-07-11 23:40:47,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:40:47,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790400259] [2022-07-11 23:40:47,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:40:47,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:40:47,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:40:47,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:40:47,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-11 23:40:47,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-11 23:40:47,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:40:47,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 23:40:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:40:48,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:40:51,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:40:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790400259] [2022-07-11 23:40:51,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790400259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:51,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:40:51,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-07-11 23:40:51,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232259175] [2022-07-11 23:40:51,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:51,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-11 23:40:51,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:40:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-11 23:40:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 23:40:51,436 INFO L87 Difference]: Start difference. First operand 184 states and 247 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:55,921 INFO L93 Difference]: Finished difference Result 409 states and 537 transitions. [2022-07-11 23:40:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-11 23:40:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:40:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:55,923 INFO L225 Difference]: With dead ends: 409 [2022-07-11 23:40:55,923 INFO L226 Difference]: Without dead ends: 403 [2022-07-11 23:40:55,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2022-07-11 23:40:55,925 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:40:55,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 67 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 204 Invalid, 0 Unknown, 417 Unchecked, 0.2s Time] [2022-07-11 23:40:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-07-11 23:40:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 263. [2022-07-11 23:40:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3435114503816794) internal successors, (352), 262 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 352 transitions. [2022-07-11 23:40:55,976 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 352 transitions. Word has length 30 [2022-07-11 23:40:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:55,976 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 352 transitions. [2022-07-11 23:40:55,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:40:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 352 transitions. [2022-07-11 23:40:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:40:55,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:55,977 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-11 23:40:55,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:56,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:40:56,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:56,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2022-07-11 23:40:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:40:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384313889] [2022-07-11 23:40:56,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:40:56,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:40:56,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:40:56,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:40:56,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-11 23:40:56,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:40:56,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:40:56,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 23:40:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:40:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:40:59,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:40:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384313889] [2022-07-11 23:40:59,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384313889] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:59,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:40:59,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-11 23:40:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031940372] [2022-07-11 23:40:59,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:40:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:40:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:40:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:40:59,293 INFO L87 Difference]: Start difference. First operand 263 states and 352 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:41:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:40,647 INFO L93 Difference]: Finished difference Result 587 states and 774 transitions. [2022-07-11 23:41:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-11 23:41:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:41:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:40,649 INFO L225 Difference]: With dead ends: 587 [2022-07-11 23:41:40,649 INFO L226 Difference]: Without dead ends: 565 [2022-07-11 23:41:40,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20028 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=8138, Invalid=49222, Unknown=0, NotChecked=0, Total=57360 [2022-07-11 23:41:40,653 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:40,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 145 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1810 Invalid, 0 Unknown, 127 Unchecked, 2.4s Time] [2022-07-11 23:41:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-11 23:41:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 382. [2022-07-11 23:41:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3595800524934383) internal successors, (518), 381 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:41:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 518 transitions. [2022-07-11 23:41:40,767 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 518 transitions. Word has length 30 [2022-07-11 23:41:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:40,768 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 518 transitions. [2022-07-11 23:41:40,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:41:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 518 transitions. [2022-07-11 23:41:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:41:40,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:40,769 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-11 23:41:40,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:40,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:40,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2022-07-11 23:41:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069959235] [2022-07-11 23:41:40,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:41:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:40,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:41:40,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-11 23:41:41,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-11 23:41:41,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:41:41,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-11 23:41:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:41:41,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:41:44,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:44,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069959235] [2022-07-11 23:41:44,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069959235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:44,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:41:44,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-11 23:41:44,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523466685] [2022-07-11 23:41:44,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:44,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:41:44,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:41:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:41:44,417 INFO L87 Difference]: Start difference. First operand 382 states and 518 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:13,302 INFO L93 Difference]: Finished difference Result 620 states and 831 transitions. [2022-07-11 23:42:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-07-11 23:42:13,303 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:42:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:13,305 INFO L225 Difference]: With dead ends: 620 [2022-07-11 23:42:13,305 INFO L226 Difference]: Without dead ends: 579 [2022-07-11 23:42:13,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8553 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=4227, Invalid=24503, Unknown=0, NotChecked=0, Total=28730 [2022-07-11 23:42:13,308 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:13,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 80 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1659 Invalid, 0 Unknown, 93 Unchecked, 1.7s Time] [2022-07-11 23:42:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-11 23:42:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 428. [2022-07-11 23:42:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.3559718969555035) internal successors, (579), 427 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 579 transitions. [2022-07-11 23:42:13,414 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 579 transitions. Word has length 30 [2022-07-11 23:42:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:13,415 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 579 transitions. [2022-07-11 23:42:13,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 579 transitions. [2022-07-11 23:42:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:42:13,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:13,416 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2022-07-11 23:42:13,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:13,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:13,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2022-07-11 23:42:13,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:13,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239957610] [2022-07-11 23:42:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:42:13,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:13,629 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:42:13,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-11 23:42:13,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-11 23:42:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:42:13,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-11 23:42:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:42:14,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:42:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:42:17,909 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:17,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239957610] [2022-07-11 23:42:17,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239957610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:42:17,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:42:17,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-07-11 23:42:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514760473] [2022-07-11 23:42:17,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:42:17,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-11 23:42:17,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-11 23:42:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 23:42:17,911 INFO L87 Difference]: Start difference. First operand 428 states and 579 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:23,396 INFO L93 Difference]: Finished difference Result 623 states and 844 transitions. [2022-07-11 23:42:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-11 23:42:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:42:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:23,399 INFO L225 Difference]: With dead ends: 623 [2022-07-11 23:42:23,399 INFO L226 Difference]: Without dead ends: 617 [2022-07-11 23:42:23,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=895, Invalid=6415, Unknown=0, NotChecked=0, Total=7310 [2022-07-11 23:42:23,400 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:23,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 242 Unchecked, 0.1s Time] [2022-07-11 23:42:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-07-11 23:42:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 550. [2022-07-11 23:42:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.3734061930783241) internal successors, (754), 549 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 754 transitions. [2022-07-11 23:42:23,532 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 754 transitions. Word has length 30 [2022-07-11 23:42:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:23,532 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 754 transitions. [2022-07-11 23:42:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 754 transitions. [2022-07-11 23:42:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:42:23,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:23,533 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-11 23:42:23,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:23,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:23,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2022-07-11 23:42:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:23,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950416149] [2022-07-11 23:42:23,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:42:23,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:23,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:42:23,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-11 23:42:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:23,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 23:42:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:42:24,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:42:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:42:26,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950416149] [2022-07-11 23:42:26,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950416149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:42:26,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:42:26,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-11 23:42:26,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727024012] [2022-07-11 23:42:26,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:42:26,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:42:26,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:26,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:42:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:42:26,942 INFO L87 Difference]: Start difference. First operand 550 states and 754 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:44,995 INFO L93 Difference]: Finished difference Result 776 states and 1047 transitions. [2022-07-11 23:42:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-07-11 23:42:44,996 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:42:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:44,999 INFO L225 Difference]: With dead ends: 776 [2022-07-11 23:42:44,999 INFO L226 Difference]: Without dead ends: 762 [2022-07-11 23:42:45,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7734 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=2487, Invalid=22635, Unknown=0, NotChecked=0, Total=25122 [2022-07-11 23:42:45,001 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:45,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1385 Invalid, 0 Unknown, 100 Unchecked, 1.6s Time] [2022-07-11 23:42:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-07-11 23:42:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 640. [2022-07-11 23:42:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.3708920187793427) internal successors, (876), 639 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 876 transitions. [2022-07-11 23:42:45,180 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 876 transitions. Word has length 30 [2022-07-11 23:42:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:45,181 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 876 transitions. [2022-07-11 23:42:45,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:42:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 876 transitions. [2022-07-11 23:42:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:42:45,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:45,182 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-11 23:42:45,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:45,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:45,390 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2022-07-11 23:42:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:45,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072988308] [2022-07-11 23:42:45,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:42:45,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:45,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:42:45,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-11 23:42:45,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:42:45,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:42:45,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 23:42:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:42:46,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:42:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:42:48,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072988308] [2022-07-11 23:42:48,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072988308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:42:48,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:42:48,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-11 23:42:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768254215] [2022-07-11 23:42:48,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:42:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:42:48,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:42:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:42:48,747 INFO L87 Difference]: Start difference. First operand 640 states and 876 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:43:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:43:16,935 INFO L93 Difference]: Finished difference Result 866 states and 1165 transitions. [2022-07-11 23:43:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-07-11 23:43:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:43:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:43:16,937 INFO L225 Difference]: With dead ends: 866 [2022-07-11 23:43:16,937 INFO L226 Difference]: Without dead ends: 831 [2022-07-11 23:43:16,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10070 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=4419, Invalid=28161, Unknown=0, NotChecked=0, Total=32580 [2022-07-11 23:43:16,939 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 184 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:43:16,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1661 Invalid, 0 Unknown, 88 Unchecked, 1.8s Time] [2022-07-11 23:43:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-07-11 23:43:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 681. [2022-07-11 23:43:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3691176470588236) internal successors, (931), 680 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:43:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 931 transitions. [2022-07-11 23:43:17,095 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 931 transitions. Word has length 30 [2022-07-11 23:43:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:43:17,096 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 931 transitions. [2022-07-11 23:43:17,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:43:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 931 transitions. [2022-07-11 23:43:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:43:17,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:43:17,097 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2022-07-11 23:43:17,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:43:17,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:43:17,312 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:43:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:43:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2022-07-11 23:43:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:43:17,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490647511] [2022-07-11 23:43:17,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:43:17,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:43:17,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:43:17,313 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:43:17,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-11 23:43:17,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-11 23:43:17,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:43:17,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-11 23:43:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:43:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:43:18,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:43:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:43:21,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:43:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490647511] [2022-07-11 23:43:21,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490647511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:43:21,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:43:21,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-07-11 23:43:21,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100447415] [2022-07-11 23:43:21,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:43:21,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-11 23:43:21,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:43:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-11 23:43:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2401, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 23:43:21,999 INFO L87 Difference]: Start difference. First operand 681 states and 931 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:43:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:43:29,016 INFO L93 Difference]: Finished difference Result 1022 states and 1381 transitions. [2022-07-11 23:43:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-11 23:43:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:43:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:43:29,019 INFO L225 Difference]: With dead ends: 1022 [2022-07-11 23:43:29,020 INFO L226 Difference]: Without dead ends: 1016 [2022-07-11 23:43:29,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1687, Invalid=9025, Unknown=0, NotChecked=0, Total=10712 [2022-07-11 23:43:29,021 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:43:29,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 159 Invalid, 0 Unknown, 306 Unchecked, 0.2s Time] [2022-07-11 23:43:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-07-11 23:43:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 866. [2022-07-11 23:43:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.3745664739884393) internal successors, (1189), 865 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:43:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1189 transitions. [2022-07-11 23:43:29,246 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1189 transitions. Word has length 30 [2022-07-11 23:43:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:43:29,246 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1189 transitions. [2022-07-11 23:43:29,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:43:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1189 transitions. [2022-07-11 23:43:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:43:29,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:43:29,247 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-11 23:43:29,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:43:29,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:43:29,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:43:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:43:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1436146862, now seen corresponding path program 10 times [2022-07-11 23:43:29,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:43:29,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816118045] [2022-07-11 23:43:29,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:43:29,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:43:29,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:43:29,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:43:29,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-11 23:43:29,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:43:29,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:43:29,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-11 23:43:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:43:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:43:30,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:43:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:43:32,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:43:32,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816118045] [2022-07-11 23:43:32,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816118045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:43:32,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:43:32,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-11 23:43:32,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845917233] [2022-07-11 23:43:32,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:43:32,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:43:32,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:43:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:43:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:43:32,908 INFO L87 Difference]: Start difference. First operand 866 states and 1189 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)