./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array29_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array29_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:42:12,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:42:12,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:42:12,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:42:12,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:42:12,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:42:12,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:42:12,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:42:12,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:42:12,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:42:12,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:42:12,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:42:12,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:42:12,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:42:12,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:42:12,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:42:12,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:42:12,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:42:12,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:42:12,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:42:12,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:42:12,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:42:12,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:42:12,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:42:12,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:42:12,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:42:12,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:42:12,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:42:12,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:42:12,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:42:12,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:42:12,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:42:12,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:42:12,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:42:12,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:42:12,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:42:12,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:42:12,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:42:12,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:42:12,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:42:12,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:42:12,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:42:12,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:42:12,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:42:12,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:42:12,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:42:12,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:42:12,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:42:12,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:42:12,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:42:12,986 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:42:12,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:42:12,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:42:12,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:42:12,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:42:12,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:42:12,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:42:12,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:42:12,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:42:12,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:42:12,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:42:12,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:42:12,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:42:12,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:42:12,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:42:12,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:42:12,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:42:12,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:42:12,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:42:12,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:42:12,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:42:12,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:42:12,996 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:42:12,996 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:42:12,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:42:12,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-12-27 21:42:13,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:42:13,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:42:13,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:42:13,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:42:13,294 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:42:13,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-27 21:42:13,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2b48921/3e451651600f4c57ac8e421ce7fefe24/FLAG17f92b8f8 [2021-12-27 21:42:13,664 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:42:13,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-27 21:42:13,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2b48921/3e451651600f4c57ac8e421ce7fefe24/FLAG17f92b8f8 [2021-12-27 21:42:14,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2b48921/3e451651600f4c57ac8e421ce7fefe24 [2021-12-27 21:42:14,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:42:14,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:42:14,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:42:14,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:42:14,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:42:14,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37569b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14, skipping insertion in model container [2021-12-27 21:42:14,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:42:14,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:42:14,230 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-27 21:42:14,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:42:14,251 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:42:14,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-27 21:42:14,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:42:14,287 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:42:14,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14 WrapperNode [2021-12-27 21:42:14,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:42:14,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:42:14,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:42:14,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:42:14,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,354 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-12-27 21:42:14,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:42:14,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:42:14,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:42:14,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:42:14,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:42:14,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:42:14,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:42:14,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:42:14,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (1/1) ... [2021-12-27 21:42:14,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:42:14,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:14,389 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) [2021-12-27 21:42:14,405 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 [2021-12-27 21:42:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:42:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:42:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:42:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:42:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:42:14,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:42:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:42:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:42:14,483 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:42:14,484 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:42:14,617 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:42:14,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:42:14,621 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-27 21:42:14,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:42:14 BoogieIcfgContainer [2021-12-27 21:42:14,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:42:14,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:42:14,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:42:14,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:42:14,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:42:14" (1/3) ... [2021-12-27 21:42:14,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372eeb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:42:14, skipping insertion in model container [2021-12-27 21:42:14,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:14" (2/3) ... [2021-12-27 21:42:14,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372eeb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:42:14, skipping insertion in model container [2021-12-27 21:42:14,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:42:14" (3/3) ... [2021-12-27 21:42:14,627 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-12-27 21:42:14,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:42:14,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:42:14,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:42:14,661 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 [2021-12-27 21:42:14,661 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:42:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) [2021-12-27 21:42:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:42:14,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:14,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:14,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-12-27 21:42:14,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:14,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399961383] [2021-12-27 21:42:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:14,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:14,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399961383] [2021-12-27 21:42:14,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399961383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:14,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:14,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:42:14,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114336702] [2021-12-27 21:42:14,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:14,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:42:14,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:14,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:42:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:42:14,807 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-27 21:42:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:14,820 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-27 21:42:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:42:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) Word has length 10 [2021-12-27 21:42:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:14,827 INFO L225 Difference]: With dead ends: 41 [2021-12-27 21:42:14,827 INFO L226 Difference]: Without dead ends: 18 [2021-12-27 21:42:14,830 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 [2021-12-27 21:42:14,833 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-27 21:42:14,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-27 21:42:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-27 21:42:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-27 21:42:14,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-27 21:42:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:14,868 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-27 21:42:14,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-27 21:42:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-27 21:42:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:42:14,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:14,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:14,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:42:14,871 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:14,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-12-27 21:42:14,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:14,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573586240] [2021-12-27 21:42:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:14,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:14,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708145734] [2021-12-27 21:42:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:14,901 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) [2021-12-27 21:42:14,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:42:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 21:42:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:15,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:15,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:15,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573586240] [2021-12-27 21:42:15,027 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708145734] [2021-12-27 21:42:15,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708145734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:15,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:15,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:42:15,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813943612] [2021-12-27 21:42:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:42:15,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:42:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:15,035 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-12-27 21:42:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:15,112 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-12-27 21:42:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:42:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) Word has length 10 [2021-12-27 21:42:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:15,114 INFO L225 Difference]: With dead ends: 36 [2021-12-27 21:42:15,114 INFO L226 Difference]: Without dead ends: 27 [2021-12-27 21:42:15,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:42:15,115 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:15,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-27 21:42:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-12-27 21:42:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-27 21:42:15,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2021-12-27 21:42:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:15,120 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-27 21:42:15,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-12-27 21:42:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-27 21:42:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:42:15,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:15,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:15,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:15,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:15,324 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 129650620, now seen corresponding path program 1 times [2021-12-27 21:42:15,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:15,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513947039] [2021-12-27 21:42:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:15,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:15,356 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:15,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464179971] [2021-12-27 21:42:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:15,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:15,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:15,376 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) [2021-12-27 21:42:15,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:42:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:15,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:42:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:42:15,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:15,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513947039] [2021-12-27 21:42:15,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464179971] [2021-12-27 21:42:15,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464179971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:15,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:15,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:42:15,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827458120] [2021-12-27 21:42:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:15,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:42:15,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:42:15,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:42:15,480 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-12-27 21:42:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:15,534 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-12-27 21:42:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:42:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 16 [2021-12-27 21:42:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:15,535 INFO L225 Difference]: With dead ends: 40 [2021-12-27 21:42:15,535 INFO L226 Difference]: Without dead ends: 25 [2021-12-27 21:42:15,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:15,536 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:15,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-27 21:42:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-12-27 21:42:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-27 21:42:15,555 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2021-12-27 21:42:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:15,555 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-27 21:42:15,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-12-27 21:42:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-27 21:42:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:42:15,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:15,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:15,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 21:42:15,771 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,SelfDestructingSolverStorable2 [2021-12-27 21:42:15,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1705469543, now seen corresponding path program 1 times [2021-12-27 21:42:15,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:15,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676561619] [2021-12-27 21:42:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:15,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:15,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:15,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955526459] [2021-12-27 21:42:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:15,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:15,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:15,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:15,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:42:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:15,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:42:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:15,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:15,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676561619] [2021-12-27 21:42:15,947 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955526459] [2021-12-27 21:42:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955526459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:15,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:15,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-27 21:42:15,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679303446] [2021-12-27 21:42:15,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:15,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 21:42:15,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 21:42:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:42:15,949 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:16,038 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-12-27 21:42:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:42:16,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 21 [2021-12-27 21:42:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:16,039 INFO L225 Difference]: With dead ends: 47 [2021-12-27 21:42:16,039 INFO L226 Difference]: Without dead ends: 30 [2021-12-27 21:42:16,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-27 21:42:16,040 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:16,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-27 21:42:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-12-27 21:42:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-12-27 21:42:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-27 21:42:16,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 21 [2021-12-27 21:42:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:16,044 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-27 21:42:16,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-27 21:42:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 21:42:16,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:16,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:16,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-27 21:42:16,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:16,262 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash 943008096, now seen corresponding path program 2 times [2021-12-27 21:42:16,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:16,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388517225] [2021-12-27 21:42:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:16,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:16,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:16,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670036526] [2021-12-27 21:42:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:42:16,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:16,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:16,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:42:16,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:42:16,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:42:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:42:16,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:16,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388517225] [2021-12-27 21:42:16,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670036526] [2021-12-27 21:42:16,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670036526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:16,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:16,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:42:16,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21240002] [2021-12-27 21:42:16,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:16,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:42:16,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:42:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:16,443 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:16,482 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-27 21:42:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:42:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-27 21:42:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:16,483 INFO L225 Difference]: With dead ends: 63 [2021-12-27 21:42:16,483 INFO L226 Difference]: Without dead ends: 41 [2021-12-27 21:42:16,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:16,484 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:16,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-27 21:42:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-12-27 21:42:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-27 21:42:16,503 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2021-12-27 21:42:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:16,504 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-27 21:42:16,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-27 21:42:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 21:42:16,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:16,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:16,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:16,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:16,738 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash -645339806, now seen corresponding path program 1 times [2021-12-27 21:42:16,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:16,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250137073] [2021-12-27 21:42:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:16,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:16,764 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:16,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916407778] [2021-12-27 21:42:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:16,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:16,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:16,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:42:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:16,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:42:16,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:42:16,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250137073] [2021-12-27 21:42:16,965 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916407778] [2021-12-27 21:42:16,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916407778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:16,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:16,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-27 21:42:16,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103226209] [2021-12-27 21:42:16,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:16,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 21:42:16,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 21:42:16,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-27 21:42:16,967 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:17,123 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-12-27 21:42:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-27 21:42:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-27 21:42:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:17,124 INFO L225 Difference]: With dead ends: 97 [2021-12-27 21:42:17,124 INFO L226 Difference]: Without dead ends: 75 [2021-12-27 21:42:17,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-12-27 21:42:17,125 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:17,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:42:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-27 21:42:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-12-27 21:42:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-27 21:42:17,131 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 26 [2021-12-27 21:42:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:17,131 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-27 21:42:17,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-27 21:42:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-27 21:42:17,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:17,132 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:17,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:17,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:17,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1156561688, now seen corresponding path program 2 times [2021-12-27 21:42:17,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:17,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029653270] [2021-12-27 21:42:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:17,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:17,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:17,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519892609] [2021-12-27 21:42:17,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:42:17,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:17,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:17,362 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:17,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:42:17,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:42:17,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-27 21:42:17,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:17,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-12-27 21:42:17,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-27 21:42:17,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-27 21:42:17,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2021-12-27 21:42:17,672 INFO L353 Elim1Store]: treesize reduction 154, result has 19.4 percent of original size [2021-12-27 21:42:17,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 98 [2021-12-27 21:42:17,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:17,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-12-27 21:42:17,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:17,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 27 [2021-12-27 21:42:17,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 89 [2021-12-27 21:42:17,940 INFO L353 Elim1Store]: treesize reduction 339, result has 18.9 percent of original size [2021-12-27 21:42:17,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 137 [2021-12-27 21:42:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:17,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 25 [2021-12-27 21:42:18,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2021-12-27 21:42:18,092 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2021-12-27 21:42:18,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 104 [2021-12-27 21:42:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:18,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2021-12-27 21:42:18,768 INFO L353 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-12-27 21:42:18,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 37 [2021-12-27 21:42:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:18,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:44,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-12-27 21:42:44,772 INFO L244 Elim1Store]: Index analysis took 137 ms [2021-12-27 21:42:45,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 21:42:45,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2021-12-27 21:42:45,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-12-27 21:42:45,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 4 [2021-12-27 21:42:56,075 WARN L228 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 141 DAG size of output: 81 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-27 21:42:56,077 INFO L353 Elim1Store]: treesize reduction 352, result has 40.9 percent of original size [2021-12-27 21:42:56,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 13764857 treesize of output 13191632 [2021-12-27 21:43:12,396 WARN L228 SmtUtils]: Spent 16.31s on a formula simplification that was a NOOP. DAG size: 1968 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-27 21:43:12,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:43:12,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029653270] [2021-12-27 21:43:12,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:43:12,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519892609] [2021-12-27 21:43:12,464 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2021-12-27 21:43:12,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:12,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:43:12,679 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-27 21:43:12,680 INFO L158 Benchmark]: Toolchain (without parser) took 58588.51ms. Allocated memory was 65.0MB in the beginning and 488.6MB in the end (delta: 423.6MB). Free memory was 45.9MB in the beginning and 291.8MB in the end (delta: -245.9MB). Peak memory consumption was 292.5MB. Max. memory is 16.1GB. [2021-12-27 21:43:12,680 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 65.0MB. Free memory was 46.9MB in the beginning and 46.9MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:43:12,681 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.04ms. Allocated memory is still 65.0MB. Free memory was 45.6MB in the beginning and 35.2MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-27 21:43:12,681 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.30ms. Allocated memory is still 65.0MB. Free memory was 35.1MB in the beginning and 47.9MB in the end (delta: -12.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 21:43:12,681 INFO L158 Benchmark]: Boogie Preprocessor took 14.13ms. Allocated memory is still 65.0MB. Free memory was 47.9MB in the beginning and 46.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:43:12,681 INFO L158 Benchmark]: RCFGBuilder took 253.41ms. Allocated memory is still 65.0MB. Free memory was 46.8MB in the beginning and 36.5MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-27 21:43:12,681 INFO L158 Benchmark]: TraceAbstraction took 58056.52ms. Allocated memory was 65.0MB in the beginning and 488.6MB in the end (delta: 423.6MB). Free memory was 35.9MB in the beginning and 291.8MB in the end (delta: -255.9MB). Peak memory consumption was 283.3MB. Max. memory is 16.1GB. [2021-12-27 21:43:12,682 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 65.0MB. Free memory was 46.9MB in the beginning and 46.9MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.04ms. Allocated memory is still 65.0MB. Free memory was 45.6MB in the beginning and 35.2MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.30ms. Allocated memory is still 65.0MB. Free memory was 35.1MB in the beginning and 47.9MB in the end (delta: -12.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.13ms. Allocated memory is still 65.0MB. Free memory was 47.9MB in the beginning and 46.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 253.41ms. Allocated memory is still 65.0MB. Free memory was 46.8MB in the beginning and 36.5MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 58056.52ms. Allocated memory was 65.0MB in the beginning and 488.6MB in the end (delta: 423.6MB). Free memory was 35.9MB in the beginning and 291.8MB in the end (delta: -255.9MB). Peak memory consumption was 283.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-27 21:43:12,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array29_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:43:14,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:43:14,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:43:14,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:43:14,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:43:14,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:43:14,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:43:14,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:43:14,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:43:14,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:43:14,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:43:14,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:43:14,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:43:14,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:43:14,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:43:14,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:43:14,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:43:14,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:43:14,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:43:14,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:43:14,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:43:14,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:43:14,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:43:14,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:43:14,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:43:14,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:43:14,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:43:14,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:43:14,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:43:14,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:43:14,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:43:14,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:43:14,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:43:14,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:43:14,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:43:14,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:43:14,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:43:14,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:43:14,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:43:14,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:43:14,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:43:14,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-27 21:43:14,787 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:43:14,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:43:14,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:43:14,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:43:14,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:43:14,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:43:14,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:43:14,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:43:14,791 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:43:14,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:43:14,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:43:14,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:43:14,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:43:14,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:43:14,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:43:14,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:43:14,793 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-27 21:43:14,793 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-27 21:43:14,793 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-27 21:43:14,793 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:43:14,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:43:14,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:43:14,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:43:14,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:43:14,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:43:14,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:43:14,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:43:14,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:43:14,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:43:14,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:43:14,795 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-27 21:43:14,795 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-27 21:43:14,795 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:43:14,796 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:43:14,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:43:14,796 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-27 21:43:14,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-12-27 21:43:15,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:43:15,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:43:15,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:43:15,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:43:15,076 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:43:15,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-27 21:43:15,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6a3756de/b9560bc778e549d486bc421f1f6a81a1/FLAGa651d5418 [2021-12-27 21:43:15,484 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:43:15,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-27 21:43:15,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6a3756de/b9560bc778e549d486bc421f1f6a81a1/FLAGa651d5418 [2021-12-27 21:43:15,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6a3756de/b9560bc778e549d486bc421f1f6a81a1 [2021-12-27 21:43:15,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:43:15,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:43:15,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:43:15,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:43:15,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:43:15,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b89ac65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15, skipping insertion in model container [2021-12-27 21:43:15,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:43:15,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:43:15,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-27 21:43:15,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:43:15,696 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:43:15,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-27 21:43:15,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:43:15,745 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:43:15,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15 WrapperNode [2021-12-27 21:43:15,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:43:15,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:43:15,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:43:15,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:43:15,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,794 INFO L137 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-27 21:43:15,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:43:15,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:43:15,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:43:15,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:43:15,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:43:15,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:43:15,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:43:15,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:43:15,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (1/1) ... [2021-12-27 21:43:15,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:43:15,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:43:15,863 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) [2021-12-27 21:43:15,865 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 [2021-12-27 21:43:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:43:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-27 21:43:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:43:15,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-27 21:43:15,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:43:15,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:43:15,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:43:15,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-27 21:43:15,960 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:43:15,961 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:43:16,372 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:43:16,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:43:16,376 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-27 21:43:16,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:43:16 BoogieIcfgContainer [2021-12-27 21:43:16,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:43:16,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:43:16,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:43:16,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:43:16,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:43:15" (1/3) ... [2021-12-27 21:43:16,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c2128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:43:16, skipping insertion in model container [2021-12-27 21:43:16,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:43:15" (2/3) ... [2021-12-27 21:43:16,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c2128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:43:16, skipping insertion in model container [2021-12-27 21:43:16,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:43:16" (3/3) ... [2021-12-27 21:43:16,381 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-12-27 21:43:16,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:43:16,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:43:16,425 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:43:16,431 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 [2021-12-27 21:43:16,431 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:43:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) [2021-12-27 21:43:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:43:16,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:16,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:16,443 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-12-27 21:43:16,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:16,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781282090] [2021-12-27 21:43:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:16,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:16,458 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) [2021-12-27 21:43:16,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-27 21:43:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-27 21:43:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:16,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:43:16,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:16,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781282090] [2021-12-27 21:43:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781282090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:43:16,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:43:16,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:43:16,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384364175] [2021-12-27 21:43:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:43:16,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:43:16,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:16,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:43:16,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:43:16,607 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-27 21:43:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:16,616 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-27 21:43:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:43:16,617 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) Word has length 10 [2021-12-27 21:43:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:16,621 INFO L225 Difference]: With dead ends: 41 [2021-12-27 21:43:16,621 INFO L226 Difference]: Without dead ends: 18 [2021-12-27 21:43:16,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:43:16,624 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-27 21:43:16,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:43:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-27 21:43:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-27 21:43:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-27 21:43:16,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-27 21:43:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:16,641 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-27 21:43:16,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-27 21:43:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-27 21:43:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:43:16,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:16,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:16,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:16,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:16,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-12-27 21:43:16,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:16,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215141822] [2021-12-27 21:43:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:16,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:16,857 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) [2021-12-27 21:43:16,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-27 21:43:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:43:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:17,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:43:17,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:17,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215141822] [2021-12-27 21:43:17,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215141822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:43:17,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:43:17,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:43:17,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539214219] [2021-12-27 21:43:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:43:17,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:43:17,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:43:17,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:17,132 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-12-27 21:43:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:17,143 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-12-27 21:43:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:43:17,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) Word has length 10 [2021-12-27 21:43:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:17,144 INFO L225 Difference]: With dead ends: 28 [2021-12-27 21:43:17,144 INFO L226 Difference]: Without dead ends: 19 [2021-12-27 21:43:17,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:17,145 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:17,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-12-27 21:43:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-27 21:43:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-27 21:43:17,148 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) [2021-12-27 21:43:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-27 21:43:17,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2021-12-27 21:43:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:17,148 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-27 21:43:17,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-12-27 21:43:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-27 21:43:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 21:43:17,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:17,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:17,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:17,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:17,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1411380456, now seen corresponding path program 1 times [2021-12-27 21:43:17,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:17,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476087851] [2021-12-27 21:43:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:17,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:17,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:17,363 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) [2021-12-27 21:43:17,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-27 21:43:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:43:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:17,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:43:17,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:17,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476087851] [2021-12-27 21:43:17,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476087851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:43:17,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:43:17,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:43:17,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772680419] [2021-12-27 21:43:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:43:17,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:43:17,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:43:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:17,569 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:17,572 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-12-27 21:43:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:43:17,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-27 21:43:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:17,573 INFO L225 Difference]: With dead ends: 34 [2021-12-27 21:43:17,573 INFO L226 Difference]: Without dead ends: 20 [2021-12-27 21:43:17,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:17,574 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:17,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-27 21:43:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-27 21:43:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-27 21:43:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-27 21:43:17,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-12-27 21:43:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:17,577 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-27 21:43:17,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-27 21:43:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:43:17,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:17,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:17,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:17,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:17,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1019100115, now seen corresponding path program 1 times [2021-12-27 21:43:17,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937989403] [2021-12-27 21:43:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:17,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:17,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:17,788 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) [2021-12-27 21:43:17,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-27 21:43:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:17,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 21:43:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:18,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:18,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:18,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937989403] [2021-12-27 21:43:18,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937989403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:18,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:18,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-27 21:43:18,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294525583] [2021-12-27 21:43:18,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:18,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-27 21:43:18,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-27 21:43:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:43:18,213 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:18,398 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-12-27 21:43:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:43:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-27 21:43:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:18,399 INFO L225 Difference]: With dead ends: 37 [2021-12-27 21:43:18,399 INFO L226 Difference]: Without dead ends: 23 [2021-12-27 21:43:18,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:43:18,400 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:18,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-12-27 21:43:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-27 21:43:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-27 21:43:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-27 21:43:18,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2021-12-27 21:43:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:18,404 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-27 21:43:18,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-27 21:43:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:43:18,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:18,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:18,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:18,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:18,611 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1412127125, now seen corresponding path program 1 times [2021-12-27 21:43:18,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:18,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870715580] [2021-12-27 21:43:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:18,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:18,613 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) [2021-12-27 21:43:18,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-27 21:43:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:18,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:43:18,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:18,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:43:18,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:18,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870715580] [2021-12-27 21:43:18,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870715580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:43:18,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:43:18,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:43:18,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584957793] [2021-12-27 21:43:18,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:43:18,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:43:18,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:43:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:43:18,738 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-12-27 21:43:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:18,818 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-12-27 21:43:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:43:18,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 16 [2021-12-27 21:43:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:18,820 INFO L225 Difference]: With dead ends: 53 [2021-12-27 21:43:18,820 INFO L226 Difference]: Without dead ends: 39 [2021-12-27 21:43:18,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:43:18,821 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:18,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:43:18,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-27 21:43:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2021-12-27 21:43:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-27 21:43:18,824 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-12-27 21:43:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:18,824 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-27 21:43:18,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-12-27 21:43:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-27 21:43:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:43:18,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:18,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:18,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-27 21:43:19,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:19,034 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1387852488, now seen corresponding path program 2 times [2021-12-27 21:43:19,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:19,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118023859] [2021-12-27 21:43:19,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:43:19,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:19,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:19,036 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) [2021-12-27 21:43:19,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-27 21:43:19,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-27 21:43:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:19,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:43:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:43:19,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:43:19,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:19,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118023859] [2021-12-27 21:43:19,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118023859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:43:19,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:43:19,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:43:19,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857765031] [2021-12-27 21:43:19,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:43:19,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:43:19,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:43:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:19,308 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-12-27 21:43:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:19,310 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-12-27 21:43:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:43:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 19 [2021-12-27 21:43:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:19,310 INFO L225 Difference]: With dead ends: 34 [2021-12-27 21:43:19,310 INFO L226 Difference]: Without dead ends: 30 [2021-12-27 21:43:19,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:19,311 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:19,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-27 21:43:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-27 21:43:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-27 21:43:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-27 21:43:19,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-12-27 21:43:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:19,314 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-27 21:43:19,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-12-27 21:43:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-27 21:43:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:43:19,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:19,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:19,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:19,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:19,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash 994825478, now seen corresponding path program 1 times [2021-12-27 21:43:19,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:19,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034712636] [2021-12-27 21:43:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:19,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:19,520 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) [2021-12-27 21:43:19,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-27 21:43:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:19,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-27 21:43:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:19,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:43:20,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:20,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034712636] [2021-12-27 21:43:20,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034712636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:20,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:20,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-27 21:43:20,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079596877] [2021-12-27 21:43:20,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:20,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 21:43:20,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 21:43:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-12-27 21:43:20,316 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2021-12-27 21:43:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:20,699 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-12-27 21:43:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-27 21:43:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 19 [2021-12-27 21:43:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:20,713 INFO L225 Difference]: With dead ends: 57 [2021-12-27 21:43:20,713 INFO L226 Difference]: Without dead ends: 48 [2021-12-27 21:43:20,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-12-27 21:43:20,714 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:20,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2021-12-27 21:43:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-27 21:43:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-27 21:43:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2021-12-27 21:43:20,719 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 19 [2021-12-27 21:43:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:20,719 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2021-12-27 21:43:20,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2021-12-27 21:43:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2021-12-27 21:43:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:43:20,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:20,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:20,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:20,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:20,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash -712374820, now seen corresponding path program 1 times [2021-12-27 21:43:20,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:20,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134736042] [2021-12-27 21:43:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:20,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:20,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:20,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 21:43:20,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-27 21:43:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:43:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:43:21,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:43:21,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:21,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134736042] [2021-12-27 21:43:21,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134736042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:21,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:21,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-27 21:43:21,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513502345] [2021-12-27 21:43:21,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:21,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:43:21,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:43:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:43:21,168 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:21,431 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2021-12-27 21:43:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 21:43:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-27 21:43:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:21,432 INFO L225 Difference]: With dead ends: 115 [2021-12-27 21:43:21,432 INFO L226 Difference]: Without dead ends: 84 [2021-12-27 21:43:21,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:43:21,433 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:21,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 67 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:43:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-27 21:43:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2021-12-27 21:43:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 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) [2021-12-27 21:43:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-12-27 21:43:21,438 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 22 [2021-12-27 21:43:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:21,438 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-12-27 21:43:21,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-12-27 21:43:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:43:21,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:21,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:21,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:21,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:21,640 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:21,641 INFO L85 PathProgramCache]: Analyzing trace with hash 915876278, now seen corresponding path program 2 times [2021-12-27 21:43:21,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:21,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125727626] [2021-12-27 21:43:21,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:43:21,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:21,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:21,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 21:43:21,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-27 21:43:21,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-27 21:43:21,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:43:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-27 21:43:21,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:43:21,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:21,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125727626] [2021-12-27 21:43:21,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125727626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:43:21,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:43:21,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:43:21,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510388228] [2021-12-27 21:43:21,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:43:21,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:43:21,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:21,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:43:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:21,977 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:21,985 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-27 21:43:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:43:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 22 [2021-12-27 21:43:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:21,986 INFO L225 Difference]: With dead ends: 51 [2021-12-27 21:43:21,986 INFO L226 Difference]: Without dead ends: 47 [2021-12-27 21:43:21,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:43:21,987 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:21,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-27 21:43:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-27 21:43:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-27 21:43:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-12-27 21:43:21,991 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 22 [2021-12-27 21:43:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:21,991 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-12-27 21:43:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-12-27 21:43:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-27 21:43:21,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:21,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:22,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:22,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:22,202 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:22,202 INFO L85 PathProgramCache]: Analyzing trace with hash 367280174, now seen corresponding path program 1 times [2021-12-27 21:43:22,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:22,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052559480] [2021-12-27 21:43:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:22,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:22,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 21:43:22,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-27 21:43:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-27 21:43:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:43:22,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:43:22,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:22,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052559480] [2021-12-27 21:43:22,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052559480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:22,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:22,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-12-27 21:43:22,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999189150] [2021-12-27 21:43:22,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:22,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 21:43:22,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 21:43:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:43:22,975 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2021-12-27 21:43:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:23,110 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2021-12-27 21:43:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-27 21:43:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-27 21:43:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:23,111 INFO L225 Difference]: With dead ends: 85 [2021-12-27 21:43:23,111 INFO L226 Difference]: Without dead ends: 67 [2021-12-27 21:43:23,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:43:23,112 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:23,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-27 21:43:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-27 21:43:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-27 21:43:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-12-27 21:43:23,118 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 25 [2021-12-27 21:43:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:23,118 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-12-27 21:43:23,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2021-12-27 21:43:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-12-27 21:43:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-27 21:43:23,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:23,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:23,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:23,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:23,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1229230681, now seen corresponding path program 2 times [2021-12-27 21:43:23,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:23,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555608022] [2021-12-27 21:43:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:43:23,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:23,327 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 21:43:23,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-27 21:43:23,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:43:23,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-27 21:43:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:43:23,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:43:24,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:24,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555608022] [2021-12-27 21:43:24,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555608022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:24,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:24,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-27 21:43:24,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357185583] [2021-12-27 21:43:24,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:24,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:43:24,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:24,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:43:24,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:43:24,364 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-12-27 21:43:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:25,063 INFO L93 Difference]: Finished difference Result 164 states and 220 transitions. [2021-12-27 21:43:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-27 21:43:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) Word has length 28 [2021-12-27 21:43:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:25,065 INFO L225 Difference]: With dead ends: 164 [2021-12-27 21:43:25,065 INFO L226 Difference]: Without dead ends: 160 [2021-12-27 21:43:25,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-12-27 21:43:25,065 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 101 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:25,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 87 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 90 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2021-12-27 21:43:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-27 21:43:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2021-12-27 21:43:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.3909774436090225) internal successors, (185), 133 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 185 transitions. [2021-12-27 21:43:25,076 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 185 transitions. Word has length 28 [2021-12-27 21:43:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:25,076 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 185 transitions. [2021-12-27 21:43:25,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-12-27 21:43:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 185 transitions. [2021-12-27 21:43:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:43:25,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:25,077 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:25,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:25,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:25,290 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash 604792272, now seen corresponding path program 3 times [2021-12-27 21:43:25,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:25,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197807896] [2021-12-27 21:43:25,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:43:25,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:25,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 21:43:25,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-27 21:43:25,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-27 21:43:25,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 21:43:25,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 21:43:25,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 21:43:26,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197807896] [2021-12-27 21:43:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197807896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:26,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:26,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-27 21:43:26,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013550331] [2021-12-27 21:43:26,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-27 21:43:26,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-27 21:43:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:43:26,050 INFO L87 Difference]: Start difference. First operand 134 states and 185 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:26,208 INFO L93 Difference]: Finished difference Result 145 states and 198 transitions. [2021-12-27 21:43:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:43:26,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-27 21:43:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:26,227 INFO L225 Difference]: With dead ends: 145 [2021-12-27 21:43:26,227 INFO L226 Difference]: Without dead ends: 141 [2021-12-27 21:43:26,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:43:26,228 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:26,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2021-12-27 21:43:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-27 21:43:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2021-12-27 21:43:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.3925925925925926) internal successors, (188), 135 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 188 transitions. [2021-12-27 21:43:26,237 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 188 transitions. Word has length 31 [2021-12-27 21:43:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:26,237 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 188 transitions. [2021-12-27 21:43:26,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:43:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 188 transitions. [2021-12-27 21:43:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:43:26,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:26,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:43:26,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:26,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 21:43:26,447 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash 304261789, now seen corresponding path program 4 times [2021-12-27 21:43:26,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 21:43:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683724113] [2021-12-27 21:43:26,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:43:26,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 21:43:26,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 21:43:26,449 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 21:43:26,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-27 21:43:26,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:43:26,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-27 21:43:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:43:27,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:43:27,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 21:43:27,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683724113] [2021-12-27 21:43:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683724113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:27,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:27,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-27 21:43:27,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842624356] [2021-12-27 21:43:27,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:27,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:43:27,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 21:43:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:43:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:43:27,429 INFO L87 Difference]: Start difference. First operand 136 states and 188 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)