./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/res2.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 105e7597bd9cfde6146cefe87563ba1bc48309677fb8b2f1d1f421bc92453e6b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:26:47,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:26:47,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:26:47,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:26:47,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:26:47,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:26:47,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:26:47,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:26:47,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:26:47,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:26:47,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:26:47,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:26:47,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:26:47,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:26:47,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:26:47,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:26:47,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:26:47,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:26:47,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:26:47,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:26:47,324 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:26:47,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:26:47,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:26:47,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:26:47,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:26:47,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:26:47,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:26:47,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:26:47,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:26:47,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:26:47,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:26:47,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:26:47,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:26:47,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:26:47,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:26:47,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:26:47,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:26:47,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:26:47,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:26:47,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:26:47,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:26:47,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:26:47,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:26:47,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:26:47,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:26:47,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:26:47,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:26:47,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:26:47,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:26:47,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:26:47,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:26:47,366 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:26:47,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:26:47,367 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:26:47,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:26:47,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:26:47,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:26:47,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:26:47,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:26:47,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:26:47,368 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:26:47,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:26:47,369 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:26:47,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:26:47,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:26:47,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:26:47,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:26:47,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:26:47,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:26:47,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:26:47,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:26:47,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:26:47,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:26:47,371 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:26:47,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:26:47,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:26:47,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 105e7597bd9cfde6146cefe87563ba1bc48309677fb8b2f1d1f421bc92453e6b [2022-07-11 23:26:47,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:26:47,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:26:47,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:26:47,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:26:47,556 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:26:47,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2.c [2022-07-11 23:26:47,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9f2d3f0/3072cbc120724c73876cde646a280832/FLAG3f9d82149 [2022-07-11 23:26:47,975 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:26:47,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2.c [2022-07-11 23:26:47,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9f2d3f0/3072cbc120724c73876cde646a280832/FLAG3f9d82149 [2022-07-11 23:26:47,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9f2d3f0/3072cbc120724c73876cde646a280832 [2022-07-11 23:26:47,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:26:47,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:26:47,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:26:47,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:26:48,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:26:48,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:26:47" (1/1) ... [2022-07-11 23:26:48,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d0dc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48, skipping insertion in model container [2022-07-11 23:26:48,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:26:47" (1/1) ... [2022-07-11 23:26:48,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:26:48,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:26:48,118 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-fpi/res2.c[587,600] [2022-07-11 23:26:48,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:26:48,144 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:26:48,156 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-fpi/res2.c[587,600] [2022-07-11 23:26:48,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:26:48,180 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:26:48,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48 WrapperNode [2022-07-11 23:26:48,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:26:48,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:26:48,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:26:48,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:26:48,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,213 INFO L137 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2022-07-11 23:26:48,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:26:48,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:26:48,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:26:48,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:26:48,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:26:48,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:26:48,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:26:48,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:26:48,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (1/1) ... [2022-07-11 23:26:48,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:26:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:26:48,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:26:48,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:26:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:26:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:26:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 23:26:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:26:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:26:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:26:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:26:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:26:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 23:26:48,351 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:26:48,352 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:26:48,472 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:26:48,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:26:48,476 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-11 23:26:48,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:26:48 BoogieIcfgContainer [2022-07-11 23:26:48,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:26:48,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:26:48,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:26:48,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:26:48,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:26:47" (1/3) ... [2022-07-11 23:26:48,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457e1918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:26:48, skipping insertion in model container [2022-07-11 23:26:48,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:26:48" (2/3) ... [2022-07-11 23:26:48,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457e1918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:26:48, skipping insertion in model container [2022-07-11 23:26:48,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:26:48" (3/3) ... [2022-07-11 23:26:48,482 INFO L111 eAbstractionObserver]: Analyzing ICFG res2.c [2022-07-11 23:26:48,491 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:26:48,491 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:26:48,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:26:48,522 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2166f654, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17e47837 [2022-07-11 23:26:48,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:26:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:26:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:26:48,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:26:48,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:26:48,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:26:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:26:48,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2022-07-11 23:26:48,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:26:48,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906966192] [2022-07-11 23:26:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:26:48,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:26:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:26:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:26:48,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:26:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906966192] [2022-07-11 23:26:48,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906966192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:26:48,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:26:48,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:26:48,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063443613] [2022-07-11 23:26:48,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:26:48,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:26:48,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:26:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:26:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:26:48,698 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:26:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:26:48,713 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-07-11 23:26:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:26:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-11 23:26:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:26:48,720 INFO L225 Difference]: With dead ends: 56 [2022-07-11 23:26:48,720 INFO L226 Difference]: Without dead ends: 26 [2022-07-11 23:26:48,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:26:48,726 INFO L413 NwaCegarLoop]: 36 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, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:26:48,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:26:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-11 23:26:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-11 23:26:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:26:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-11 23:26:48,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2022-07-11 23:26:48,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:26:48,754 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-11 23:26:48,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:26:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-11 23:26:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:26:48,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:26:48,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:26:48,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:26:48,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:26:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:26:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2022-07-11 23:26:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:26:48,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899418543] [2022-07-11 23:26:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:26:48,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:26:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:26:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:26:48,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:26:48,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899418543] [2022-07-11 23:26:48,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899418543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:26:48,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:26:48,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:26:48,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124551620] [2022-07-11 23:26:48,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:26:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:26:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:26:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:26:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:26:48,883 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:26:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:26:48,947 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-11 23:26:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:26:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-11 23:26:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:26:48,948 INFO L225 Difference]: With dead ends: 57 [2022-07-11 23:26:48,948 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:26:48,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:26:48,954 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:26:48,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:26:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:26:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-07-11 23:26:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 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) [2022-07-11 23:26:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-11 23:26:48,960 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2022-07-11 23:26:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:26:48,960 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-11 23:26:48,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:26:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-11 23:26:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 23:26:48,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:26:48,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:26:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:26:48,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:26:48,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:26:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2022-07-11 23:26:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:26:48,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405796821] [2022-07-11 23:26:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:26:48,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:26:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:26:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:26:49,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:26:49,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405796821] [2022-07-11 23:26:49,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405796821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:26:49,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504704246] [2022-07-11 23:26:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:26:49,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:26:49,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:26:49,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:26:49,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:26:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:26:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 23:26:49,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:26:49,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:26:49,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:26:49,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:26:49,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-11 23:26:50,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:26:50,125 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-11 23:26:50,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-11 23:26:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:26:50,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-11 23:26:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:26:50,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:26:50,401 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-11 23:26:50,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-07-11 23:26:50,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:26:50,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-11 23:26:50,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:26:50,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 12 [2022-07-11 23:26:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:26:50,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:27:21,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:21,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:21,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:21,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504704246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:27:21,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:27:21,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-07-11 23:27:21,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754859361] [2022-07-11 23:27:21,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:27:21,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-11 23:27:21,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:21,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-11 23:27:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1356, Unknown=13, NotChecked=0, Total=1640 [2022-07-11 23:27:21,405 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:24,599 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-07-11 23:27:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 23:27:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2022-07-11 23:27:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:24,602 INFO L225 Difference]: With dead ends: 78 [2022-07-11 23:27:24,602 INFO L226 Difference]: Without dead ends: 73 [2022-07-11 23:27:24,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=482, Invalid=2366, Unknown=14, NotChecked=0, Total=2862 [2022-07-11 23:27:24,603 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:27:24,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 158 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 171 Invalid, 0 Unknown, 400 Unchecked, 0.1s Time] [2022-07-11 23:27:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-11 23:27:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2022-07-11 23:27:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-07-11 23:27:24,626 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 31 [2022-07-11 23:27:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:24,626 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-07-11 23:27:24,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-07-11 23:27:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-11 23:27:24,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:24,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:24,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 23:27:24,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:24,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245574, now seen corresponding path program 2 times [2022-07-11 23:27:24,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:24,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387492511] [2022-07-11 23:27:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:24,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:27:24,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387492511] [2022-07-11 23:27:24,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387492511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:27:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218454743] [2022-07-11 23:27:24,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:27:24,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:24,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:24,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:27:24,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:27:24,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:27:24,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:27:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:27:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:27:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:27:25,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:27:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:27:25,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218454743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:27:25,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:27:25,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:27:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436193592] [2022-07-11 23:27:25,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:27:25,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:27:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:27:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:27:25,057 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:25,196 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2022-07-11 23:27:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:27:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-11 23:27:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:25,198 INFO L225 Difference]: With dead ends: 138 [2022-07-11 23:27:25,198 INFO L226 Difference]: Without dead ends: 72 [2022-07-11 23:27:25,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:27:25,201 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:27:25,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 35 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:27:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-11 23:27:25,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-07-11 23:27:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-11 23:27:25,210 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 33 [2022-07-11 23:27:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:25,210 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-11 23:27:25,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-11 23:27:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 23:27:25,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:25,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:25,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:27:25,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 23:27:25,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:25,424 INFO L85 PathProgramCache]: Analyzing trace with hash 447877832, now seen corresponding path program 3 times [2022-07-11 23:27:25,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:25,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163395842] [2022-07-11 23:27:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:27:25,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:25,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163395842] [2022-07-11 23:27:25,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163395842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:27:25,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482668957] [2022-07-11 23:27:25,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:27:25,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:25,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:25,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:27:25,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:27:25,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:27:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:27:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:27:25,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:27:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:27:25,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:27:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:27:25,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482668957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:27:25,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:27:25,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:27:25,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120315328] [2022-07-11 23:27:25,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:27:25,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:27:25,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:27:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:27:25,622 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:25,752 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-07-11 23:27:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:27:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-11 23:27:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:25,753 INFO L225 Difference]: With dead ends: 65 [2022-07-11 23:27:25,753 INFO L226 Difference]: Without dead ends: 49 [2022-07-11 23:27:25,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:27:25,754 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:27:25,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 30 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:27:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-11 23:27:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-07-11 23:27:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-07-11 23:27:25,758 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 35 [2022-07-11 23:27:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:25,758 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-07-11 23:27:25,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-07-11 23:27:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:27:25,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:25,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:25,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:27:25,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:25,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1410382416, now seen corresponding path program 4 times [2022-07-11 23:27:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152168277] [2022-07-11 23:27:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:27,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152168277] [2022-07-11 23:27:27,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152168277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:27:27,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904202509] [2022-07-11 23:27:27,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:27:27,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:27,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:27:27,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:27:27,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:27:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:27:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-11 23:27:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:27:27,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:27:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:27,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:27:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:27,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-11 23:27:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:27,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:27,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:27,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-07-11 23:27:28,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-07-11 23:27:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:28,276 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-11 23:27:28,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2022-07-11 23:27:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:28,513 INFO L356 Elim1Store]: treesize reduction 44, result has 31.3 percent of original size [2022-07-11 23:27:28,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 80 treesize of output 80 [2022-07-11 23:27:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:28,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-07-11 23:27:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-07-11 23:27:28,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:28,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:28,994 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-11 23:27:28,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2022-07-11 23:27:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:29,241 INFO L356 Elim1Store]: treesize reduction 44, result has 31.3 percent of original size [2022-07-11 23:27:29,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 81 treesize of output 81 [2022-07-11 23:27:29,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:29,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:29,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-07-11 23:27:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:29,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-07-11 23:27:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:29,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-07-11 23:27:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:29,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:31:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:31:26,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904202509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:31:26,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:31:26,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 27] total 82 [2022-07-11 23:31:26,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21189939] [2022-07-11 23:31:26,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:31:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-11 23:31:26,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:31:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-11 23:31:26,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=5920, Unknown=96, NotChecked=0, Total=6642 [2022-07-11 23:31:26,357 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)