./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 e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-dev-e19ca92 [2021-12-22 08:32:31,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:32:31,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:32:32,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:32:32,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:32:32,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:32:32,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:32:32,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:32:32,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:32:32,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:32:32,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:32:32,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:32:32,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:32:32,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:32:32,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:32:32,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:32:32,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:32:32,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:32:32,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:32:32,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:32:32,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:32:32,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:32:32,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:32:32,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:32:32,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:32:32,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:32:32,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:32:32,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:32:32,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:32:32,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:32:32,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:32:32,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:32:32,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:32:32,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:32:32,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:32:32,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:32:32,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:32:32,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:32:32,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:32:32,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:32:32,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:32:32,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:32:32,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:32:32,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:32:32,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:32:32,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:32:32,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:32:32,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:32:32,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:32:32,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:32:32,081 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:32:32,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:32:32,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:32:32,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:32:32,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:32:32,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:32:32,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:32:32,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:32:32,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:32:32,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:32:32,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:32:32,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:32:32,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:32:32,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:32:32,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:32:32,084 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:32:32,084 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:32:32,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:32:32,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:32:32,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-22 08:32:32,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:32:32,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:32:32,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:32:32,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:32:32,273 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:32:32,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-22 08:32:32,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97ae5b656/55017e2d50a54c5da44e7641c21d5d64/FLAGd3ff19e12 [2021-12-22 08:32:32,632 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:32:32,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-22 08:32:32,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97ae5b656/55017e2d50a54c5da44e7641c21d5d64/FLAGd3ff19e12 [2021-12-22 08:32:33,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97ae5b656/55017e2d50a54c5da44e7641c21d5d64 [2021-12-22 08:32:33,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:32:33,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:32:33,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:32:33,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:32:33,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:32:33,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757cfee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33, skipping insertion in model container [2021-12-22 08:32:33,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:32:33,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:32:33,210 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] [2021-12-22 08:32:33,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:32:33,233 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:32:33,250 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] [2021-12-22 08:32:33,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:32:33,261 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:32:33,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33 WrapperNode [2021-12-22 08:32:33,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:32:33,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:32:33,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:32:33,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:32:33,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,280 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-22 08:32:33,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:32:33,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:32:33,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:32:33,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:32:33,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:32:33,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:32:33,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:32:33,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:32:33,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (1/1) ... [2021-12-22 08:32:33,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:32:33,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:32:33,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:32:33,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:32:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:32:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:32:33,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:32:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:32:33,396 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:32:33,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:32:33,496 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:32:33,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:32:33,503 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 08:32:33,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:32:33 BoogieIcfgContainer [2021-12-22 08:32:33,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:32:33,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:32:33,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:32:33,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:32:33,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:32:33" (1/3) ... [2021-12-22 08:32:33,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a4cfb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:32:33, skipping insertion in model container [2021-12-22 08:32:33,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:33" (2/3) ... [2021-12-22 08:32:33,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a4cfb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:32:33, skipping insertion in model container [2021-12-22 08:32:33,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:32:33" (3/3) ... [2021-12-22 08:32:33,515 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-22 08:32:33,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:32:33,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:32:33,556 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:32:33,562 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:32:33,562 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:32:33,578 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) [2021-12-22 08:32:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 08:32:33,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:33,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 08:32:33,583 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-22 08:32:33,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:32:33,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608957602] [2021-12-22 08:32:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:33,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:32:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:33,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:32:33,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608957602] [2021-12-22 08:32:33,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608957602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:32:33,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:32:33,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:32:33,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743795006] [2021-12-22 08:32:33,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:32:33,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:32:33,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:32:33,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:32:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:32:33,709 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) [2021-12-22 08:32:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:33,717 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-22 08:32:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:32:33,718 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 [2021-12-22 08:32:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:33,722 INFO L225 Difference]: With dead ends: 21 [2021-12-22 08:32:33,722 INFO L226 Difference]: Without dead ends: 9 [2021-12-22 08:32:33,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:32:33,727 INFO L933 BasicCegarLoop]: 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 [2021-12-22 08:32:33,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:32:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-22 08:32:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-22 08:32:33,749 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) [2021-12-22 08:32:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-22 08:32:33,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-22 08:32:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:33,751 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-22 08:32:33,751 INFO L471 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) [2021-12-22 08:32:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-22 08:32:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 08:32:33,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:33,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 08:32:33,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:32:33,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:33,753 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-22 08:32:33,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:32:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570144167] [2021-12-22 08:32:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:33,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:32:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:33,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:32:33,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570144167] [2021-12-22 08:32:33,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570144167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:32:33,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:32:33,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:32:33,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703856200] [2021-12-22 08:32:33,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:32:33,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:32:33,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:32:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:32:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:32:33,838 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) [2021-12-22 08:32:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:33,845 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-22 08:32:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:32:33,846 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 [2021-12-22 08:32:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:33,846 INFO L225 Difference]: With dead ends: 16 [2021-12-22 08:32:33,846 INFO L226 Difference]: Without dead ends: 12 [2021-12-22 08:32:33,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:32:33,848 INFO L933 BasicCegarLoop]: 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 [2021-12-22 08:32:33,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:32:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-22 08:32:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-22 08:32:33,850 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) [2021-12-22 08:32:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-22 08:32:33,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-22 08:32:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:33,851 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-22 08:32:33,851 INFO L471 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) [2021-12-22 08:32:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-22 08:32:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 08:32:33,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:33,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:32:33,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:32:33,852 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:33,867 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-22 08:32:33,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:32:33,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952930659] [2021-12-22 08:32:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:33,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:32:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:33,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:32:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952930659] [2021-12-22 08:32:33,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952930659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:32:33,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231207148] [2021-12-22 08:32:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:33,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:32:33,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:32:33,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:32:33,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:32:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:33,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 08:32:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:32:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:34,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231207148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:32:34,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:32:34,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 08:32:34,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732709916] [2021-12-22 08:32:34,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:32:34,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:32:34,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:32:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:32:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:32:34,077 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-12-22 08:32:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:34,120 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-22 08:32:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:32:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 [2021-12-22 08:32:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:34,122 INFO L225 Difference]: With dead ends: 23 [2021-12-22 08:32:34,122 INFO L226 Difference]: Without dead ends: 19 [2021-12-22 08:32:34,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:32:34,125 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:32:34,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:32:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-22 08:32:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-22 08:32:34,131 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) [2021-12-22 08:32:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-22 08:32:34,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-22 08:32:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:34,133 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-22 08:32:34,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-12-22 08:32:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-22 08:32:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 08:32:34,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:34,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-22 08:32:34,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:32:34,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:32:34,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:34,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-22 08:32:34,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:32:34,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29316974] [2021-12-22 08:32:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:34,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:32:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:34,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:32:34,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29316974] [2021-12-22 08:32:34,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29316974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:32:34,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741049210] [2021-12-22 08:32:34,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:32:34,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:32:34,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:32:34,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:32:34,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:32:34,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:32:34,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:32:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 08:32:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:34,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:32:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741049210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:32:34,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:32:34,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2021-12-22 08:32:34,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834955977] [2021-12-22 08:32:34,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:32:34,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 08:32:34,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:32:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 08:32:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-12-22 08:32:34,868 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) [2021-12-22 08:32:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:35,146 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-12-22 08:32:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:32:35,147 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 [2021-12-22 08:32:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:35,147 INFO L225 Difference]: With dead ends: 41 [2021-12-22 08:32:35,147 INFO L226 Difference]: Without dead ends: 37 [2021-12-22 08:32:35,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-12-22 08:32:35,149 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:32:35,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 84 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:32:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-22 08:32:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-22 08:32:35,153 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) [2021-12-22 08:32:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-12-22 08:32:35,154 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2021-12-22 08:32:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:35,154 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-12-22 08:32:35,155 INFO L471 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) [2021-12-22 08:32:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-12-22 08:32:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:32:35,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:35,156 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-22 08:32:35,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:32:35,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 08:32:35,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-22 08:32:35,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:32:35,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295140541] [2021-12-22 08:32:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:35,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:32:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 08:32:35,388 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 08:32:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 08:32:35,433 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 08:32:35,434 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 08:32:35,434 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 08:32:35,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 08:32:35,438 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-12-22 08:32:35,440 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 08:32:35,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 08:32:35 BoogieIcfgContainer [2021-12-22 08:32:35,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 08:32:35,467 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 08:32:35,468 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 08:32:35,468 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 08:32:35,468 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:32:33" (3/4) ... [2021-12-22 08:32:35,471 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 08:32:35,472 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 08:32:35,473 INFO L158 Benchmark]: Toolchain (without parser) took 2402.79ms. Allocated memory is still 119.5MB. Free memory was 93.9MB in the beginning and 46.5MB in the end (delta: 47.5MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. [2021-12-22 08:32:35,473 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:32:35,473 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.97ms. Allocated memory is still 119.5MB. Free memory was 93.9MB in the beginning and 96.6MB in the end (delta: -2.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 08:32:35,474 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.65ms. Allocated memory is still 119.5MB. Free memory was 96.6MB in the beginning and 95.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 08:32:35,476 INFO L158 Benchmark]: Boogie Preprocessor took 10.78ms. Allocated memory is still 119.5MB. Free memory was 95.3MB in the beginning and 94.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:32:35,477 INFO L158 Benchmark]: RCFGBuilder took 212.20ms. Allocated memory is still 119.5MB. Free memory was 94.1MB in the beginning and 85.3MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 08:32:35,477 INFO L158 Benchmark]: TraceAbstraction took 1954.62ms. Allocated memory is still 119.5MB. Free memory was 84.8MB in the beginning and 47.4MB in the end (delta: 37.4MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. [2021-12-22 08:32:35,477 INFO L158 Benchmark]: Witness Printer took 4.85ms. Allocated memory is still 119.5MB. Free memory was 47.4MB in the beginning and 46.5MB in the end (delta: 864.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 08:32:35,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.97ms. Allocated memory is still 119.5MB. Free memory was 93.9MB in the beginning and 96.6MB in the end (delta: -2.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.65ms. Allocated memory is still 119.5MB. Free memory was 96.6MB in the beginning and 95.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.78ms. Allocated memory is still 119.5MB. Free memory was 95.3MB in the beginning and 94.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 212.20ms. Allocated memory is still 119.5MB. Free memory was 94.1MB in the beginning and 85.3MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1954.62ms. Allocated memory is still 119.5MB. Free memory was 84.8MB in the beginning and 47.4MB in the end (delta: 37.4MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. * Witness Printer took 4.85ms. Allocated memory is still 119.5MB. Free memory was 47.4MB in the beginning and 46.5MB in the end (delta: 864.5kB). Peak memory consumption was 2.1MB. 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 [c=0, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=0, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=1, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=1, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=2, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=2, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=3, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=3, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=4, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=4, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=5, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=5, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=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 [c=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=7, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=7, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, y=0] [L30] COND FALSE !(c < (unsigned char)8) VAL [bit=0, c=8, 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: 1.9s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 100 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 100 mSDsluCounter, 142 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 95 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 94 IncrementalHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 47 mSDtfsCounter, 94 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 25, 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, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 599 SizeOfPredicates, 3 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 21 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 [2021-12-22 08:32:35,495 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-dev-e19ca92 [2021-12-22 08:32:37,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:32:37,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:32:37,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:32:37,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:32:37,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:32:37,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:32:37,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:32:37,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:32:37,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:32:37,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:32:37,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:32:37,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:32:37,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:32:37,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:32:37,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:32:37,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:32:37,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:32:37,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:32:37,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:32:37,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:32:37,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:32:37,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:32:37,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:32:37,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:32:37,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:32:37,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:32:37,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:32:37,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:32:37,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:32:37,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:32:37,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:32:37,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:32:37,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:32:37,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:32:37,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:32:37,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:32:37,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:32:37,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:32:37,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:32:37,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:32:37,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-22 08:32:37,617 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:32:37,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:32:37,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:32:37,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:32:37,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:32:37,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:32:37,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:32:37,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:32:37,621 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:32:37,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 08:32:37,622 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 08:32:37,623 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 08:32:37,623 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:32:37,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:32:37,623 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:32:37,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:32:37,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:32:37,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:32:37,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:32:37,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:32:37,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:32:37,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:32:37,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:32:37,624 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 08:32:37,624 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 08:32:37,625 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:32:37,625 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:32:37,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:32:37,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:32:37,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 08:32:37,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-22 08:32:37,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:32:37,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:32:37,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:32:37,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:32:37,930 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:32:37,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-22 08:32:37,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497b29162/bdda9eaf746a4a2590e031dfe8894bae/FLAG584d28aba [2021-12-22 08:32:38,273 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:32:38,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-22 08:32:38,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497b29162/bdda9eaf746a4a2590e031dfe8894bae/FLAG584d28aba [2021-12-22 08:32:38,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497b29162/bdda9eaf746a4a2590e031dfe8894bae [2021-12-22 08:32:38,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:32:38,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:32:38,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:32:38,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:32:38,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:32:38,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b97b54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38, skipping insertion in model container [2021-12-22 08:32:38,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:32:38,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:32:38,828 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] [2021-12-22 08:32:38,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:32:38,842 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:32:38,850 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] [2021-12-22 08:32:38,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:32:38,861 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:32:38,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38 WrapperNode [2021-12-22 08:32:38,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:32:38,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:32:38,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:32:38,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:32:38,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,895 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-22 08:32:38,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:32:38,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:32:38,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:32:38,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:32:38,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:32:38,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:32:38,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:32:38,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:32:38,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (1/1) ... [2021-12-22 08:32:38,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:32:38,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:32:38,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:32:38,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:32:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:32:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:32:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:32:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 08:32:39,041 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:32:39,043 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:32:39,185 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:32:39,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:32:39,193 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 08:32:39,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:32:39 BoogieIcfgContainer [2021-12-22 08:32:39,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:32:39,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:32:39,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:32:39,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:32:39,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:32:38" (1/3) ... [2021-12-22 08:32:39,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fc6e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:32:39, skipping insertion in model container [2021-12-22 08:32:39,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:38" (2/3) ... [2021-12-22 08:32:39,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fc6e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:32:39, skipping insertion in model container [2021-12-22 08:32:39,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:32:39" (3/3) ... [2021-12-22 08:32:39,202 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-22 08:32:39,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:32:39,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:32:39,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:32:39,270 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:32:39,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:32:39,286 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) [2021-12-22 08:32:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 08:32:39,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:39,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 08:32:39,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-22 08:32:39,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:32:39,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918167628] [2021-12-22 08:32:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:39,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:32:39,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:32:39,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:32:39,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 08:32:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:39,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 08:32:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:39,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:32:39,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:32:39,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918167628] [2021-12-22 08:32:39,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918167628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:32:39,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:32:39,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:32:39,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350385844] [2021-12-22 08:32:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:32:39,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:32:39,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:32:39,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:32:39,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:32:39,450 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) [2021-12-22 08:32:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:39,458 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-22 08:32:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:32:39,460 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 [2021-12-22 08:32:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:39,465 INFO L225 Difference]: With dead ends: 21 [2021-12-22 08:32:39,465 INFO L226 Difference]: Without dead ends: 9 [2021-12-22 08:32:39,467 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:32:39,470 INFO L933 BasicCegarLoop]: 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 [2021-12-22 08:32:39,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:32:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-22 08:32:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-22 08:32:39,489 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) [2021-12-22 08:32:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-22 08:32:39,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-22 08:32:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:39,490 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-22 08:32:39,491 INFO L471 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) [2021-12-22 08:32:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-22 08:32:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 08:32:39,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:39,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 08:32:39,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:32:39,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:32:39,698 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-22 08:32:39,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:32:39,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912262167] [2021-12-22 08:32:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:39,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:32:39,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:32:39,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:32:39,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 08:32:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 08:32:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:39,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:32:39,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:32:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912262167] [2021-12-22 08:32:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912262167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:32:39,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:32:39,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:32:39,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394205007] [2021-12-22 08:32:39,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:32:39,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:32:39,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:32:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:32:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:32:39,802 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) [2021-12-22 08:32:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:39,820 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-22 08:32:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:32:39,821 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 [2021-12-22 08:32:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:39,821 INFO L225 Difference]: With dead ends: 16 [2021-12-22 08:32:39,821 INFO L226 Difference]: Without dead ends: 12 [2021-12-22 08:32:39,822 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:32:39,835 INFO L933 BasicCegarLoop]: 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 [2021-12-22 08:32:39,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:32:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-22 08:32:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-22 08:32:39,838 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) [2021-12-22 08:32:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-22 08:32:39,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-22 08:32:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:39,839 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-22 08:32:39,839 INFO L471 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) [2021-12-22 08:32:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-22 08:32:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 08:32:39,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:39,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:32:39,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:32:40,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:32:40,043 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-22 08:32:40,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:32:40,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554393399] [2021-12-22 08:32:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:40,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:32:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:32:40,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:32:40,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 08:32:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:32:40,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:40,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:32:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:40,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:32:40,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554393399] [2021-12-22 08:32:40,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554393399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:32:40,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:32:40,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-22 08:32:40,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453576669] [2021-12-22 08:32:40,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:32:40,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:32:40,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:32:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:32:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:32:40,189 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) [2021-12-22 08:32:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:40,239 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-22 08:32:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:32:40,239 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 [2021-12-22 08:32:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:40,240 INFO L225 Difference]: With dead ends: 23 [2021-12-22 08:32:40,240 INFO L226 Difference]: Without dead ends: 19 [2021-12-22 08:32:40,240 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:32:40,241 INFO L933 BasicCegarLoop]: 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 [2021-12-22 08:32:40,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:32:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-22 08:32:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-22 08:32:40,244 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) [2021-12-22 08:32:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-22 08:32:40,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-22 08:32:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:40,245 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-22 08:32:40,245 INFO L471 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) [2021-12-22 08:32:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-22 08:32:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 08:32:40,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:40,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-22 08:32:40,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:32:40,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:32:40,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-22 08:32:40,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:32:40,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038478588] [2021-12-22 08:32:40,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:32:40,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:32:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:32:40,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:32:40,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 08:32:40,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:32:40,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:32:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:32:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:40,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:32:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:40,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:32:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038478588] [2021-12-22 08:32:40,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038478588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:32:40,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:32:40,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-22 08:32:40,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829378073] [2021-12-22 08:32:40,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:32:40,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 08:32:40,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:32:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 08:32:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:32:40,771 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) [2021-12-22 08:32:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:40,874 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-22 08:32:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 08:32:40,874 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 [2021-12-22 08:32:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:40,875 INFO L225 Difference]: With dead ends: 35 [2021-12-22 08:32:40,875 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 08:32:40,875 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:32:40,876 INFO L933 BasicCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:32:40,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 82 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:32:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 08:32:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-22 08:32:40,882 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) [2021-12-22 08:32:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-22 08:32:40,883 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-22 08:32:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:40,883 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-22 08:32:40,884 INFO L471 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) [2021-12-22 08:32:40,884 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-22 08:32:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:32:40,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:40,885 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-22 08:32:40,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:32:41,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:32:41,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-22 08:32:41,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:32:41,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721799347] [2021-12-22 08:32:41,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:32:41,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:32:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:32:41,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:32:41,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 08:32:41,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-22 08:32:41,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:32:41,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 08:32:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:43,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:32:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:46,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:32:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721799347] [2021-12-22 08:32:46,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721799347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:32:46,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:32:46,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2021-12-22 08:32:46,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291363472] [2021-12-22 08:32:46,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:32:46,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-22 08:32:46,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:32:46,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-22 08:32:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2170, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 08:32:46,683 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) [2021-12-22 08:32:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:32:51,931 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-12-22 08:32:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 08:32:51,933 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 [2021-12-22 08:32:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:32:51,934 INFO L225 Difference]: With dead ends: 96 [2021-12-22 08:32:51,934 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 08:32:51,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1669, Invalid=5813, Unknown=0, NotChecked=0, Total=7482 [2021-12-22 08:32:51,949 INFO L933 BasicCegarLoop]: 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:32:51,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 165 Invalid, 0 Unknown, 263 Unchecked, 0.3s Time] [2021-12-22 08:32:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 08:32:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2021-12-22 08:32:51,960 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) [2021-12-22 08:32:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-12-22 08:32:51,961 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2021-12-22 08:32:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:32:51,961 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-12-22 08:32:51,961 INFO L471 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) [2021-12-22 08:32:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-12-22 08:32:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:32:51,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:32:51,962 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:32:51,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 08:32:52,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:32:52,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:32:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:32:52,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-12-22 08:32:52,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:32:52,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483600262] [2021-12-22 08:32:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:32:52,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:32:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:32:52,171 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:32:52,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 08:32:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:32:52,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 08:32:52,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:32:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:53,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:32:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:32:55,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:32:55,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483600262] [2021-12-22 08:32:55,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483600262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:32:55,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:32:55,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-22 08:32:55,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413752935] [2021-12-22 08:32:55,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:32:55,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-22 08:32:55,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:32:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-22 08:32:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 08:32:55,394 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) [2021-12-22 08:33:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:26,397 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2021-12-22 08:33:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-12-22 08:33:26,397 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 [2021-12-22 08:33:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:26,400 INFO L225 Difference]: With dead ends: 319 [2021-12-22 08:33:26,400 INFO L226 Difference]: Without dead ends: 285 [2021-12-22 08:33:26,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16710 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=7758, Invalid=41748, Unknown=0, NotChecked=0, Total=49506 [2021-12-22 08:33:26,416 INFO L933 BasicCegarLoop]: 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, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:26,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 115 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1598 Invalid, 0 Unknown, 136 Unchecked, 2.2s Time] [2021-12-22 08:33:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-22 08:33:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-12-22 08:33:26,447 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) [2021-12-22 08:33:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-12-22 08:33:26,448 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 30 [2021-12-22 08:33:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:26,449 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-12-22 08:33:26,449 INFO L471 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) [2021-12-22 08:33:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-12-22 08:33:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:33:26,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:26,450 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:26,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-22 08:33:26,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:33:26,653 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-12-22 08:33:26,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:33:26,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220753208] [2021-12-22 08:33:26,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:33:26,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:33:26,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:33:26,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 08:33:26,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 08:33:26,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:33:26,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:26,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 08:33:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:27,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:30,001 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:33:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220753208] [2021-12-22 08:33:30,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220753208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:30,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:33:30,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-22 08:33:30,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142673979] [2021-12-22 08:33:30,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:30,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-22 08:33:30,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:33:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-22 08:33:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 08:33:30,006 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)