./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/brs5.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 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:34:21,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:34:21,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:34:21,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:34:21,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:34:21,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:34:21,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:34:21,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:34:21,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:34:21,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:34:21,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:34:21,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:34:21,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:34:21,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:34:21,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:34:21,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:34:21,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:34:21,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:34:21,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:34:21,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:34:21,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:34:21,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:34:21,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:34:21,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:34:21,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:34:21,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:34:21,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:34:21,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:34:21,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:34:21,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:34:21,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:34:21,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:34:21,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:34:21,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:34:21,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:34:21,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:34:21,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:34:21,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:34:21,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:34:21,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:34:21,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:34:21,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:34:21,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:34:21,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:34:21,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:34:21,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:34:21,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:34:21,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:34:21,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:34:21,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:34:21,407 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:34:21,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:34:21,407 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:34:21,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:34:21,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:34:21,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:34:21,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:34:21,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:34:21,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:34:21,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:34:21,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:34:21,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:34:21,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:34:21,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:34:21,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:34:21,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:34:21,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:34:21,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:34:21,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:34:21,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:34:21,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:34:21,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:34:21,411 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:34:21,411 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:34:21,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:34:21,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:34:21,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 [2021-12-14 11:34:21,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:34:21,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:34:21,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:34:21,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:34:21,656 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:34:21,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs5.c [2021-12-14 11:34:21,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467b5c042/248e266c6b28426a99a6b38e32799306/FLAG22d884eaa [2021-12-14 11:34:22,052 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:34:22,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c [2021-12-14 11:34:22,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467b5c042/248e266c6b28426a99a6b38e32799306/FLAG22d884eaa [2021-12-14 11:34:22,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467b5c042/248e266c6b28426a99a6b38e32799306 [2021-12-14 11:34:22,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:34:22,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:34:22,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:34:22,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:34:22,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:34:22,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1126b9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22, skipping insertion in model container [2021-12-14 11:34:22,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:34:22,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:34:22,287 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/brs5.c[587,600] [2021-12-14 11:34:22,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:34:22,315 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:34:22,330 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/brs5.c[587,600] [2021-12-14 11:34:22,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:34:22,360 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:34:22,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22 WrapperNode [2021-12-14 11:34:22,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:34:22,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:34:22,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:34:22,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:34:22,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,401 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-14 11:34:22,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:34:22,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:34:22,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:34:22,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:34:22,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:34:22,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:34:22,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:34:22,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:34:22,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (1/1) ... [2021-12-14 11:34:22,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:34:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:22,472 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) [2021-12-14 11:34:22,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:34:22,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:34:22,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:34:22,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:34:22,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 11:34:22,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:34:22,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:34:22,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:34:22,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:34:22,503 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 [2021-12-14 11:34:22,573 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:34:22,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:34:22,729 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:34:22,733 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:34:22,742 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 11:34:22,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:22 BoogieIcfgContainer [2021-12-14 11:34:22,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:34:22,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:34:22,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:34:22,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:34:22,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:34:22" (1/3) ... [2021-12-14 11:34:22,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6f60db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:22, skipping insertion in model container [2021-12-14 11:34:22,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:22" (2/3) ... [2021-12-14 11:34:22,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6f60db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:22, skipping insertion in model container [2021-12-14 11:34:22,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:22" (3/3) ... [2021-12-14 11:34:22,750 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5.c [2021-12-14 11:34:22,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:34:22,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:34:22,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:34:22,808 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 [2021-12-14 11:34:22,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:34:22,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) [2021-12-14 11:34:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 11:34:22,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:22,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:22,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-12-14 11:34:22,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:22,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497228435] [2021-12-14 11:34:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:22,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:23,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:23,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497228435] [2021-12-14 11:34:23,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497228435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:34:23,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:34:23,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 11:34:23,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452168352] [2021-12-14 11:34:23,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:34:23,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 11:34:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 11:34:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:34:23,042 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:23,055 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-14 11:34:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 11:34:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 11:34:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:23,062 INFO L225 Difference]: With dead ends: 36 [2021-12-14 11:34:23,062 INFO L226 Difference]: Without dead ends: 16 [2021-12-14 11:34:23,065 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 [2021-12-14 11:34:23,067 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-12-14 11:34:23,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-14 11:34:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-14 11:34:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-14 11:34:23,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-14 11:34:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:23,091 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-14 11:34:23,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-14 11:34:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 11:34:23,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:23,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:23,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:34:23,095 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-12-14 11:34:23,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:23,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125640970] [2021-12-14 11:34:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:23,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:23,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:23,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125640970] [2021-12-14 11:34:23,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125640970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:34:23,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:34:23,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:34:23,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914976051] [2021-12-14 11:34:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:34:23,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:34:23,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:23,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:34:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:34:23,196 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:23,253 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-14 11:34:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:34:23,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 11:34:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:23,254 INFO L225 Difference]: With dead ends: 33 [2021-12-14 11:34:23,254 INFO L226 Difference]: Without dead ends: 22 [2021-12-14 11:34:23,255 INFO L932 BasicCegarLoop]: 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 [2021-12-14 11:34:23,256 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:23,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-14 11:34:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-14 11:34:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-12-14 11:34:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-14 11:34:23,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-12-14 11:34:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:23,262 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-14 11:34:23,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-14 11:34:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 11:34:23,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:23,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:23,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:34:23,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-12-14 11:34:23,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:23,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498911265] [2021-12-14 11:34:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:23,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:34:23,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:23,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498911265] [2021-12-14 11:34:23,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498911265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:34:23,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:34:23,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:34:23,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5374772] [2021-12-14 11:34:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:34:23,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:34:23,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:34:23,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:34:23,386 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2021-12-14 11:34:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:23,451 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-14 11:34:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 11:34:23,452 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 17 [2021-12-14 11:34:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:23,453 INFO L225 Difference]: With dead ends: 27 [2021-12-14 11:34:23,454 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 11:34:23,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:34:23,456 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:23,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:34:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 11:34:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-14 11:34:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-14 11:34:23,464 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-14 11:34:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:23,465 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-14 11:34:23,465 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) [2021-12-14 11:34:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-14 11:34:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 11:34:23,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:23,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:23,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 11:34:23,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-12-14 11:34:23,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:23,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810214672] [2021-12-14 11:34:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:23,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:23,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810214672] [2021-12-14 11:34:23,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810214672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:34:23,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464004854] [2021-12-14 11:34:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:23,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:23,572 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) [2021-12-14 11:34:23,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:34:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:23,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:34:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:23,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:23,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464004854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:23,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:34:23,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-14 11:34:23,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485376589] [2021-12-14 11:34:23,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:23,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 11:34:23,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:23,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 11:34:23,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-14 11:34:23,773 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:23,871 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-14 11:34:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 11:34:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 20 [2021-12-14 11:34:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:23,872 INFO L225 Difference]: With dead ends: 43 [2021-12-14 11:34:23,872 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 11:34:23,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:34:23,881 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:23,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:34:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 11:34:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-14 11:34:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-12-14 11:34:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-14 11:34:23,890 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-12-14 11:34:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:23,891 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-14 11:34:23,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-14 11:34:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 11:34:23,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:23,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:23,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:24,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:24,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-12-14 11:34:24,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:24,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632860051] [2021-12-14 11:34:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:24,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:24,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632860051] [2021-12-14 11:34:24,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632860051] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:34:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644256279] [2021-12-14 11:34:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:24,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:24,518 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) [2021-12-14 11:34:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:34:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:24,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-14 11:34:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:24,625 INFO L388 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 [2021-12-14 11:34:24,722 INFO L388 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 15 treesize of output 11 [2021-12-14 11:34:24,942 INFO L388 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 [2021-12-14 11:34:25,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:34:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 28 [2021-12-14 11:34:25,253 INFO L388 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 30 treesize of output 10 [2021-12-14 11:34:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:25,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:32,225 INFO L388 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 222 treesize of output 210 [2021-12-14 11:34:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:32,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644256279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:32,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:34:32,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2021-12-14 11:34:32,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710176063] [2021-12-14 11:34:32,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:32,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 11:34:32,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 11:34:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=489, Unknown=8, NotChecked=0, Total=600 [2021-12-14 11:34:32,965 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:33,162 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-14 11:34:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:34:33,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 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 23 [2021-12-14 11:34:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:33,163 INFO L225 Difference]: With dead ends: 52 [2021-12-14 11:34:33,164 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 11:34:33,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=142, Invalid=606, Unknown=8, NotChecked=0, Total=756 [2021-12-14 11:34:33,165 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:33,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 61 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-12-14 11:34:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 11:34:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-14 11:34:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-12-14 11:34:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-14 11:34:33,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2021-12-14 11:34:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:33,170 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-14 11:34:33,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-14 11:34:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 11:34:33,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:33,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:33,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:33,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:33,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2021-12-14 11:34:33,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:33,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681382187] [2021-12-14 11:34:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:33,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:33,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681382187] [2021-12-14 11:34:33,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681382187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:34:33,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933347977] [2021-12-14 11:34:33,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:34:33,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:33,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:33,478 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) [2021-12-14 11:34:33,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:34:33,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:34:33,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:34:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:34:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:33,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:34:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:33,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933347977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:34:33,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:34:33,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-14 11:34:33,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335029308] [2021-12-14 11:34:33,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:34:33,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:34:33,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:34:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:34:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:34:33,697 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:34:33,860 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-12-14 11:34:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 11:34:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-12-14 11:34:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:34:33,862 INFO L225 Difference]: With dead ends: 69 [2021-12-14 11:34:33,862 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 11:34:33,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-14 11:34:33,863 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:34:33,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:34:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 11:34:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-12-14 11:34:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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) [2021-12-14 11:34:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-14 11:34:33,867 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2021-12-14 11:34:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:34:33,867 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-14 11:34:33,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:34:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-14 11:34:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 11:34:33,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:34:33,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:34:33,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:34:34,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:34,069 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:34:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:34:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 3 times [2021-12-14 11:34:34,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:34:34,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784833649] [2021-12-14 11:34:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:34:34,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:34:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:34:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:34:34,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:34:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784833649] [2021-12-14 11:34:34,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784833649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:34:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531991096] [2021-12-14 11:34:34,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:34:34,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:34:34,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:34:34,733 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) [2021-12-14 11:34:34,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:34:34,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 11:34:34,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:34:34,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 11:34:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:34:34,825 INFO L388 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 [2021-12-14 11:34:34,882 INFO L388 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 15 treesize of output 11 [2021-12-14 11:34:34,994 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-14 11:34:34,994 INFO L388 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 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-14 11:34:37,549 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-14 11:34:37,550 INFO L388 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-12-14 11:34:37,656 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-12-14 11:34:37,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2021-12-14 11:34:37,841 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-12-14 11:34:37,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 68 [2021-12-14 11:34:43,301 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-12-14 11:34:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 21 [2021-12-14 11:34:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:34:43,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:35:13,925 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-14 11:35:13,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 756 treesize of output 731 [2021-12-14 11:35:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:35:21,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531991096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:35:21,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:35:21,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 48 [2021-12-14 11:35:21,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428122517] [2021-12-14 11:35:21,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:35:21,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-14 11:35:21,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:35:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-14 11:35:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1876, Unknown=21, NotChecked=0, Total=2256 [2021-12-14 11:35:21,957 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:35:28,856 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2021-12-14 11:35:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-14 11:35:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-14 11:35:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:35:28,857 INFO L225 Difference]: With dead ends: 91 [2021-12-14 11:35:28,857 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 11:35:28,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=697, Invalid=3439, Unknown=24, NotChecked=0, Total=4160 [2021-12-14 11:35:28,859 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:35:28,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 79 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 198 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2021-12-14 11:35:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 11:35:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-12-14 11:35:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-14 11:35:28,865 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2021-12-14 11:35:28,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:35:28,865 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-14 11:35:28,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-14 11:35:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-14 11:35:28,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:35:28,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:35:28,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:35:29,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:29,071 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:35:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:35:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1722173266, now seen corresponding path program 4 times [2021-12-14 11:35:29,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:35:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548599693] [2021-12-14 11:35:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:35:29,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:35:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:35:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:29,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:35:29,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548599693] [2021-12-14 11:35:29,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548599693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:35:29,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567546609] [2021-12-14 11:35:29,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:35:29,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:29,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:35:29,155 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) [2021-12-14 11:35:29,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:35:29,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:35:29,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:35:29,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 11:35:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:35:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:29,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:35:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567546609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:35:29,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:35:29,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-14 11:35:29,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535549379] [2021-12-14 11:35:29,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:35:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 11:35:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:35:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 11:35:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-14 11:35:29,365 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:35:29,567 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-12-14 11:35:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 11:35:29,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-14 11:35:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:35:29,570 INFO L225 Difference]: With dead ends: 118 [2021-12-14 11:35:29,571 INFO L226 Difference]: Without dead ends: 78 [2021-12-14 11:35:29,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-12-14 11:35:29,576 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:35:29,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 57 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:35:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-14 11:35:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2021-12-14 11:35:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-12-14 11:35:29,595 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 32 [2021-12-14 11:35:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:35:29,595 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-12-14 11:35:29,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:35:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-12-14 11:35:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 11:35:29,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:35:29,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:35:29,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:35:29,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:29,796 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:35:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:35:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 456261758, now seen corresponding path program 5 times [2021-12-14 11:35:29,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:35:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139456001] [2021-12-14 11:35:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:35:29,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:35:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:35:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:30,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:35:30,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139456001] [2021-12-14 11:35:30,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139456001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:35:30,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839074445] [2021-12-14 11:35:30,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:35:30,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:35:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:35:30,640 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) [2021-12-14 11:35:30,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:35:30,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-14 11:35:30,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:35:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 11:35:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:35:30,726 INFO L388 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 [2021-12-14 11:35:30,766 INFO L388 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 15 treesize of output 11 [2021-12-14 11:35:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:30,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-14 11:35:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:30,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:30,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-12-14 11:35:31,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-12-14 11:35:31,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:35:31,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2021-12-14 11:35:31,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:35:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2021-12-14 11:35:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 11:35:31,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2021-12-14 11:35:31,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:35:31,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2021-12-14 11:35:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:35:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates...