./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rew.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-tiling/rew.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 a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:38:45,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:38:45,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:38:45,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:38:45,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:38:45,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:38:45,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:38:45,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:38:45,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:38:45,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:38:45,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:38:45,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:38:45,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:38:45,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:38:45,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:38:45,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:38:45,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:38:45,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:38:45,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:38:45,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:38:45,203 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:38:45,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:38:45,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:38:45,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:38:45,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:38:45,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:38:45,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:38:45,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:38:45,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:38:45,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:38:45,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:38:45,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:38:45,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:38:45,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:38:45,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:38:45,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:38:45,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:38:45,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:38:45,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:38:45,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:38:45,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:38:45,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:38:45,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:38:45,255 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:38:45,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:38:45,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:38:45,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:38:45,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:38:45,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:38:45,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:38:45,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:38:45,258 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:38:45,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:38:45,259 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:38:45,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:38:45,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:38:45,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:38:45,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:38:45,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:38:45,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:38:45,260 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:38:45,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:38:45,260 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:38:45,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:38:45,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:38:45,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:38:45,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:38:45,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:38:45,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:38:45,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:38:45,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:38:45,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:38:45,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:38:45,263 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:38:45,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:38:45,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:38:45,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e [2022-07-19 09:38:45,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:38:45,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:38:45,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:38:45,545 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:38:45,546 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:38:45,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rew.c [2022-07-19 09:38:45,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e696b424/654ce29c3b034dc88c57e1cca4757254/FLAGad3f0fc89 [2022-07-19 09:38:46,055 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:38:46,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2022-07-19 09:38:46,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e696b424/654ce29c3b034dc88c57e1cca4757254/FLAGad3f0fc89 [2022-07-19 09:38:46,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e696b424/654ce29c3b034dc88c57e1cca4757254 [2022-07-19 09:38:46,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:38:46,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:38:46,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:38:46,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:38:46,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:38:46,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c06152c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46, skipping insertion in model container [2022-07-19 09:38:46,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:38:46,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:38:46,621 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-tiling/rew.c[394,407] [2022-07-19 09:38:46,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:38:46,654 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:38:46,667 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-tiling/rew.c[394,407] [2022-07-19 09:38:46,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:38:46,698 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:38:46,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46 WrapperNode [2022-07-19 09:38:46,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:38:46,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:38:46,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:38:46,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:38:46,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,733 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-07-19 09:38:46,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:38:46,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:38:46,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:38:46,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:38:46,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:38:46,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:38:46,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:38:46,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:38:46,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (1/1) ... [2022-07-19 09:38:46,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:38:46,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:46,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:38:46,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:38:46,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:38:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:38:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:38:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:38:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:38:46,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:38:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:38:46,914 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:38:46,916 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:38:47,084 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:38:47,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:38:47,090 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 09:38:47,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:38:47 BoogieIcfgContainer [2022-07-19 09:38:47,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:38:47,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:38:47,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:38:47,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:38:47,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:38:46" (1/3) ... [2022-07-19 09:38:47,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d8edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:38:47, skipping insertion in model container [2022-07-19 09:38:47,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:38:46" (2/3) ... [2022-07-19 09:38:47,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d8edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:38:47, skipping insertion in model container [2022-07-19 09:38:47,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:38:47" (3/3) ... [2022-07-19 09:38:47,115 INFO L111 eAbstractionObserver]: Analyzing ICFG rew.c [2022-07-19 09:38:47,127 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:38:47,144 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:38:47,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:38:47,217 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d832cea, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@414cc8ef [2022-07-19 09:38:47,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:38:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 09:38:47,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:47,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:47,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-07-19 09:38:47,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:47,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381138924] [2022-07-19 09:38:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:47,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:47,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381138924] [2022-07-19 09:38:47,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381138924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:38:47,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:38:47,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:38:47,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983528970] [2022-07-19 09:38:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:38:47,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:38:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:38:47,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:38:47,445 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:47,460 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-19 09:38:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:38:47,463 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-07-19 09:38:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:47,469 INFO L225 Difference]: With dead ends: 29 [2022-07-19 09:38:47,476 INFO L226 Difference]: Without dead ends: 14 [2022-07-19 09:38:47,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:38:47,485 INFO L413 NwaCegarLoop]: 21 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, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:47,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:38:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-19 09:38:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-19 09:38:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-19 09:38:47,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-19 09:38:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:47,517 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-19 09:38:47,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-19 09:38:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 09:38:47,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:47,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:47,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:38:47,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-07-19 09:38:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:47,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447955655] [2022-07-19 09:38:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:47,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447955655] [2022-07-19 09:38:47,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447955655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:38:47,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:38:47,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:38:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62530995] [2022-07-19 09:38:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:38:47,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:38:47,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:38:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:38:47,631 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:47,673 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-19 09:38:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:38:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-07-19 09:38:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:47,676 INFO L225 Difference]: With dead ends: 29 [2022-07-19 09:38:47,676 INFO L226 Difference]: Without dead ends: 18 [2022-07-19 09:38:47,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:38:47,679 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:47,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:38:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-19 09:38:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-07-19 09:38:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-19 09:38:47,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-19 09:38:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:47,688 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-19 09:38:47,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-19 09:38:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 09:38:47,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:47,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:47,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:38:47,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:47,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-07-19 09:38:47,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:47,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017263262] [2022-07-19 09:38:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:47,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:47,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:47,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017263262] [2022-07-19 09:38:47,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017263262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285081458] [2022-07-19 09:38:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:47,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:47,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:47,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:47,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:38:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:38:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:47,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:47,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285081458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:47,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:47,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:38:47,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531611452] [2022-07-19 09:38:47,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:47,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:38:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:38:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:38:47,951 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:48,018 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-07-19 09:38:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 09:38:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) Word has length 12 [2022-07-19 09:38:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:48,020 INFO L225 Difference]: With dead ends: 34 [2022-07-19 09:38:48,020 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 09:38:48,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-07-19 09:38:48,024 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:48,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:38:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 09:38:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-19 09:38:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-19 09:38:48,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-07-19 09:38:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:48,033 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-19 09:38:48,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-19 09:38:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 09:38:48,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:48,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:48,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:48,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:48,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-07-19 09:38:48,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:48,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408841848] [2022-07-19 09:38:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:48,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:48,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408841848] [2022-07-19 09:38:48,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408841848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221548191] [2022-07-19 09:38:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:48,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:48,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:48,512 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:48,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:38:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:48,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 09:38:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:48,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:38:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:48,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:38:48,817 INFO L390 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 15 treesize of output 7 [2022-07-19 09:38:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:48,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:53,021 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_36 Int)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_23| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_36) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2022-07-19 09:38:53,054 INFO L390 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 21 treesize of output 19 [2022-07-19 09:38:53,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2022-07-19 09:38:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-19 09:38:53,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221548191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:53,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:53,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2022-07-19 09:38:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498732656] [2022-07-19 09:38:53,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:38:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:38:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=217, Unknown=1, NotChecked=30, Total=306 [2022-07-19 09:38:53,139 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:55,171 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= .cse0 0) (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_36 Int)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_23| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_36) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (= (+ (- 2) |c_ULTIMATE.start_main_~low~0#1|) 0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) is different from false [2022-07-19 09:38:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:55,317 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-19 09:38:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 09:38:55,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 09:38:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:55,318 INFO L225 Difference]: With dead ends: 28 [2022-07-19 09:38:55,319 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 09:38:55,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=101, Invalid=325, Unknown=2, NotChecked=78, Total=506 [2022-07-19 09:38:55,320 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:55,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 82 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-19 09:38:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 09:38:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-07-19 09:38:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-19 09:38:55,324 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-07-19 09:38:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:55,325 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-19 09:38:55,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-19 09:38:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 09:38:55,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:55,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:55,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:55,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 09:38:55,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-07-19 09:38:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:55,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250844476] [2022-07-19 09:38:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:55,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:55,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250844476] [2022-07-19 09:38:55,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250844476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235871651] [2022-07-19 09:38:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:55,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:55,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:38:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:38:55,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:56,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:38:56,140 INFO L390 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 15 treesize of output 7 [2022-07-19 09:38:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:56,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:56,247 INFO L390 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 16 treesize of output 14 [2022-07-19 09:38:56,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:38:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:56,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235871651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:56,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:56,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 09:38:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967665484] [2022-07-19 09:38:56,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:56,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:38:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:38:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:38:56,317 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:56,586 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-07-19 09:38:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:38:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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 [2022-07-19 09:38:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:56,587 INFO L225 Difference]: With dead ends: 51 [2022-07-19 09:38:56,587 INFO L226 Difference]: Without dead ends: 49 [2022-07-19 09:38:56,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:38:56,588 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:56,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 94 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:38:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-19 09:38:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2022-07-19 09:38:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-19 09:38:56,594 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2022-07-19 09:38:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:56,594 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-19 09:38:56,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-19 09:38:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 09:38:56,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:56,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:56,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:56,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:56,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash -255872648, now seen corresponding path program 2 times [2022-07-19 09:38:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:56,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389581474] [2022-07-19 09:38:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:57,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:57,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389581474] [2022-07-19 09:38:57,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389581474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:57,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494094996] [2022-07-19 09:38:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:38:57,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:57,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:57,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:57,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:38:57,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:38:57,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:57,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 09:38:57,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:57,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:38:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:57,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:38:57,341 INFO L390 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 15 treesize of output 7 [2022-07-19 09:38:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:57,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:05,540 INFO L390 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 23 treesize of output 21 [2022-07-19 09:39:05,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-19 09:39:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:05,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494094996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:05,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:05,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2022-07-19 09:39:05,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573206095] [2022-07-19 09:39:05,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:05,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:39:05,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:39:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=461, Unknown=3, NotChecked=0, Total=552 [2022-07-19 09:39:05,658 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:05,949 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-07-19 09:39:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:39:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 24 [2022-07-19 09:39:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:05,951 INFO L225 Difference]: With dead ends: 70 [2022-07-19 09:39:05,951 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 09:39:05,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=182, Invalid=871, Unknown=3, NotChecked=0, Total=1056 [2022-07-19 09:39:05,952 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:05,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 66 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 184 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-07-19 09:39:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 09:39:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 40. [2022-07-19 09:39:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-07-19 09:39:05,964 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 24 [2022-07-19 09:39:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:05,964 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-07-19 09:39:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-07-19 09:39:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 09:39:05,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:05,966 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:05,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 09:39:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:06,184 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:06,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 3 times [2022-07-19 09:39:06,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:06,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296313705] [2022-07-19 09:39:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:06,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:06,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296313705] [2022-07-19 09:39:06,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296313705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:06,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7411540] [2022-07-19 09:39:06,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:39:06,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:06,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:06,287 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) [2022-07-19 09:39:06,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:39:06,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:39:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 09:39:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:06,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:06,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7411540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:06,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:06,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-19 09:39:06,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495701579] [2022-07-19 09:39:06,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:06,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:39:06,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:06,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:39:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:39:06,458 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:06,558 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-07-19 09:39:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:39:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 09:39:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:06,559 INFO L225 Difference]: With dead ends: 85 [2022-07-19 09:39:06,559 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 09:39:06,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-19 09:39:06,561 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:06,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 52 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 09:39:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-07-19 09:39:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-07-19 09:39:06,566 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2022-07-19 09:39:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:06,567 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-07-19 09:39:06,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-07-19 09:39:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 09:39:06,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:06,568 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:06,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:06,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:06,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 4 times [2022-07-19 09:39:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219138331] [2022-07-19 09:39:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:06,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:07,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:07,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219138331] [2022-07-19 09:39:07,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219138331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:07,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579399712] [2022-07-19 09:39:07,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:39:07,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:07,167 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) [2022-07-19 09:39:07,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:39:07,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:39:07,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:07,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 09:39:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:07,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:07,371 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:39:07,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:39:07,389 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:39:07,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:39:07,445 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:39:07,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:39:07,541 INFO L390 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 19 treesize of output 7 [2022-07-19 09:39:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:07,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:43,676 INFO L390 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 38 treesize of output 36 [2022-07-19 09:39:43,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 790 treesize of output 782 [2022-07-19 09:39:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:44,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579399712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:44,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 29 [2022-07-19 09:39:44,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352088501] [2022-07-19 09:39:44,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:44,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 09:39:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 09:39:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=665, Unknown=17, NotChecked=0, Total=812 [2022-07-19 09:39:44,043 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:44,263 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-07-19 09:39:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:39:44,263 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 09:39:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:44,264 INFO L225 Difference]: With dead ends: 48 [2022-07-19 09:39:44,264 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 09:39:44,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=181, Invalid=858, Unknown=17, NotChecked=0, Total=1056 [2022-07-19 09:39:44,265 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:44,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 72 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-07-19 09:39:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 09:39:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-07-19 09:39:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-19 09:39:44,269 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2022-07-19 09:39:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:44,270 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-19 09:39:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-19 09:39:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 09:39:44,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:44,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:44,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 09:39:44,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:44,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 5 times [2022-07-19 09:39:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:44,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446212077] [2022-07-19 09:39:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:44,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:44,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446212077] [2022-07-19 09:39:44,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446212077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610364071] [2022-07-19 09:39:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:39:44,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:44,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:44,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:39:44,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 09:39:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:39:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:44,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:39:44,926 INFO L390 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 19 treesize of output 7 [2022-07-19 09:39:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:44,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:45,057 INFO L390 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 16 treesize of output 14 [2022-07-19 09:39:45,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:39:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:45,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610364071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:45,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:45,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-07-19 09:39:45,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723000468] [2022-07-19 09:39:45,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:45,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:39:45,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:39:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:39:45,171 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:45,509 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-07-19 09:39:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 09:39:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 09:39:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:45,511 INFO L225 Difference]: With dead ends: 63 [2022-07-19 09:39:45,511 INFO L226 Difference]: Without dead ends: 61 [2022-07-19 09:39:45,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 09:39:45,512 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:45,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 137 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 300 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-07-19 09:39:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-19 09:39:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2022-07-19 09:39:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-19 09:39:45,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2022-07-19 09:39:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:45,519 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-19 09:39:45,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-19 09:39:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 09:39:45,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:45,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:45,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 09:39:45,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:45,734 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash 368564393, now seen corresponding path program 6 times [2022-07-19 09:39:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:45,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601411116] [2022-07-19 09:39:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:45,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:45,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601411116] [2022-07-19 09:39:45,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601411116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240956724] [2022-07-19 09:39:45,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:39:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:45,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:45,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:39:46,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 09:39:46,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 09:39:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:46,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:46,161 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:39:46,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:39:46,278 INFO L390 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 19 treesize of output 7 [2022-07-19 09:39:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:46,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:58,548 INFO L390 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 23 treesize of output 21 [2022-07-19 09:39:58,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-19 09:39:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:58,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240956724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:58,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:58,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 30 [2022-07-19 09:39:58,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254690344] [2022-07-19 09:39:58,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:58,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 09:39:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 09:39:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=758, Unknown=4, NotChecked=0, Total=870 [2022-07-19 09:39:58,697 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:59,089 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-07-19 09:39:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:39:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 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 [2022-07-19 09:39:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:59,090 INFO L225 Difference]: With dead ends: 77 [2022-07-19 09:39:59,090 INFO L226 Difference]: Without dead ends: 75 [2022-07-19 09:39:59,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=220, Invalid=1416, Unknown=4, NotChecked=0, Total=1640 [2022-07-19 09:39:59,091 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:59,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 115 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 330 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-07-19 09:39:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-19 09:39:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-07-19 09:39:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-07-19 09:39:59,098 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 32 [2022-07-19 09:39:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:59,098 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-07-19 09:39:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-07-19 09:39:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 09:39:59,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:59,099 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:59,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 09:39:59,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 09:39:59,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:59,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 7 times [2022-07-19 09:39:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936261412] [2022-07-19 09:39:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:59,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:59,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936261412] [2022-07-19 09:39:59,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936261412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868601846] [2022-07-19 09:39:59,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:39:59,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:59,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:59,412 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:59,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:39:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 09:39:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:59,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:59,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868601846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:59,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:59,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-19 09:39:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442756927] [2022-07-19 09:39:59,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 09:39:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 09:39:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-19 09:39:59,611 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-07-19 09:39:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:59,740 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-07-19 09:39:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:39:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) Word has length 32 [2022-07-19 09:39:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:59,741 INFO L225 Difference]: With dead ends: 82 [2022-07-19 09:39:59,742 INFO L226 Difference]: Without dead ends: 59 [2022-07-19 09:39:59,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:39:59,743 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:59,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 64 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-19 09:39:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-07-19 09:39:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-19 09:39:59,749 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2022-07-19 09:39:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:59,749 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-19 09:39:59,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-07-19 09:39:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-19 09:39:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 09:39:59,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:59,750 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:59,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:59,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:59,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 367413348, now seen corresponding path program 8 times [2022-07-19 09:39:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475519438] [2022-07-19 09:39:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:00,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475519438] [2022-07-19 09:40:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475519438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557967234] [2022-07-19 09:40:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:40:00,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:00,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:00,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:00,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:40:00,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:40:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 09:40:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:00,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:00,425 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:40:00,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:40:00,450 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:40:00,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:40:00,505 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:40:00,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:40:00,658 INFO L390 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 19 treesize of output 7 [2022-07-19 09:40:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:00,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:42,317 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_109| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_109|)) (forall ((v_ArrVal_269 Int) (v_ArrVal_271 Int) (|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_109| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_269) (+ (* |v_ULTIMATE.start_main_~i~0#1_108| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_271) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_109| 1) |v_ULTIMATE.start_main_~i~0#1_108|)))))) is different from false [2022-07-19 09:40:42,330 INFO L390 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 30 treesize of output 28 [2022-07-19 09:40:42,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1610 treesize of output 1578 [2022-07-19 09:40:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-19 09:40:46,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557967234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:46,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:46,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 35 [2022-07-19 09:40:46,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232750633] [2022-07-19 09:40:46,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 09:40:46,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 09:40:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=970, Unknown=17, NotChecked=64, Total=1190 [2022-07-19 09:40:46,358 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:48,465 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse0 8) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (= |c_ULTIMATE.start_main_~low~0#1| 2) (forall ((|v_ULTIMATE.start_main_~i~0#1_109| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_109|)) (forall ((v_ArrVal_269 Int) (v_ArrVal_271 Int) (|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_109| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_269) (+ (* |v_ULTIMATE.start_main_~i~0#1_108| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_271) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_109| 1) |v_ULTIMATE.start_main_~i~0#1_108|)))))))) is different from false [2022-07-19 09:40:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:48,886 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-07-19 09:40:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:40:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 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 36 [2022-07-19 09:40:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:48,888 INFO L225 Difference]: With dead ends: 65 [2022-07-19 09:40:48,888 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 09:40:48,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=289, Invalid=1771, Unknown=18, NotChecked=178, Total=2256 [2022-07-19 09:40:48,889 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:48,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 189 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 448 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-07-19 09:40:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 09:40:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-07-19 09:40:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-07-19 09:40:48,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2022-07-19 09:40:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:48,896 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-07-19 09:40:48,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-07-19 09:40:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 09:40:48,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:48,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:48,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:49,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 09:40:49,107 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 9 times [2022-07-19 09:40:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:49,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123708376] [2022-07-19 09:40:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:49,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:49,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:49,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123708376] [2022-07-19 09:40:49,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123708376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:49,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95926338] [2022-07-19 09:40:49,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:40:49,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:49,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:49,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:49,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:40:49,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 09:40:49,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:40:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:49,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:49,845 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 09:40:49,846 INFO L390 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 23 treesize of output 10 [2022-07-19 09:40:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:49,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:50,123 INFO L390 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 18 treesize of output 16 [2022-07-19 09:40:50,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-19 09:40:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:50,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95926338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:50,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:50,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-07-19 09:40:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498048622] [2022-07-19 09:40:50,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:50,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 09:40:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:50,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 09:40:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 09:40:50,372 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:50,809 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-07-19 09:40:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 09:40:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 36 [2022-07-19 09:40:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:50,810 INFO L225 Difference]: With dead ends: 69 [2022-07-19 09:40:50,810 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 09:40:50,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 09:40:50,811 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:50,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 149 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-07-19 09:40:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 09:40:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-07-19 09:40:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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) [2022-07-19 09:40:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-19 09:40:50,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2022-07-19 09:40:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:50,817 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-19 09:40:50,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-19 09:40:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 09:40:50,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:50,818 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:50,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 09:40:51,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 09:40:51,024 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1209559974, now seen corresponding path program 10 times [2022-07-19 09:40:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423109528] [2022-07-19 09:40:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:51,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:51,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423109528] [2022-07-19 09:40:51,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423109528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886869638] [2022-07-19 09:40:51,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:40:51,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:51,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:51,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:51,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:40:51,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:40:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 09:40:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:51,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:51,480 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:40:51,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:40:51,615 INFO L390 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 19 treesize of output 7 [2022-07-19 09:40:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:05,917 INFO L390 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 23 treesize of output 21 [2022-07-19 09:41:05,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-19 09:41:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:06,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886869638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:06,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:06,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 36 [2022-07-19 09:41:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321531150] [2022-07-19 09:41:06,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:06,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 09:41:06,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 09:41:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1114, Unknown=6, NotChecked=0, Total=1260 [2022-07-19 09:41:06,060 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:06,485 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-07-19 09:41:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 09:41:06,485 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 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 40 [2022-07-19 09:41:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:06,486 INFO L225 Difference]: With dead ends: 75 [2022-07-19 09:41:06,486 INFO L226 Difference]: Without dead ends: 73 [2022-07-19 09:41:06,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=260, Invalid=1990, Unknown=6, NotChecked=0, Total=2256 [2022-07-19 09:41:06,487 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:06,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 195 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 372 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-07-19 09:41:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-19 09:41:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-07-19 09:41:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-19 09:41:06,500 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2022-07-19 09:41:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:06,500 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-19 09:41:06,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-19 09:41:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 09:41:06,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:06,501 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:06,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:06,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 09:41:06,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 11 times [2022-07-19 09:41:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:06,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144359280] [2022-07-19 09:41:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:06,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:07,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144359280] [2022-07-19 09:41:07,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144359280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:07,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118903071] [2022-07-19 09:41:07,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:41:07,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:07,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:07,029 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:07,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:41:07,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 09:41:07,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 09:41:07,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:07,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:41:07,298 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:41:07,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:41:07,310 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:41:07,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:41:07,361 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:41:07,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:41:07,527 INFO L390 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 19 treesize of output 7 [2022-07-19 09:41:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:07,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:42,042 INFO L390 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 31 treesize of output 29 [2022-07-19 09:41:42,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1638 treesize of output 1606 [2022-07-19 09:41:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:42,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118903071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:42,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:42,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 40 [2022-07-19 09:41:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017976244] [2022-07-19 09:41:42,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:42,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 09:41:42,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 09:41:42,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1372, Unknown=8, NotChecked=0, Total=1560 [2022-07-19 09:41:42,561 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:43,173 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2022-07-19 09:41:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 09:41:43,173 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 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 44 [2022-07-19 09:41:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:43,174 INFO L225 Difference]: With dead ends: 77 [2022-07-19 09:41:43,174 INFO L226 Difference]: Without dead ends: 75 [2022-07-19 09:41:43,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=335, Invalid=2413, Unknown=8, NotChecked=0, Total=2756 [2022-07-19 09:41:43,176 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:43,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 223 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 601 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2022-07-19 09:41:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-19 09:41:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-07-19 09:41:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-19 09:41:43,184 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2022-07-19 09:41:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:43,184 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-19 09:41:43,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-19 09:41:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 09:41:43,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:43,185 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:43,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:43,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 09:41:43,400 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 12 times [2022-07-19 09:41:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:43,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571086616] [2022-07-19 09:41:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:43,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571086616] [2022-07-19 09:41:43,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571086616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630150957] [2022-07-19 09:41:43,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:41:43,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:43,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:43,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:43,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 09:41:43,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 09:41:43,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:43,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 09:41:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:43,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:41:44,287 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 09:41:44,287 INFO L390 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 23 treesize of output 10 [2022-07-19 09:41:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:44,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:44,645 INFO L390 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 18 treesize of output 16 [2022-07-19 09:41:44,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-19 09:41:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:44,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630150957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:44,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:44,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-07-19 09:41:44,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682999586] [2022-07-19 09:41:44,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:44,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 09:41:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:44,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 09:41:44,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 09:41:44,984 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:45,670 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-07-19 09:41:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 09:41:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 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 44 [2022-07-19 09:41:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:45,671 INFO L225 Difference]: With dead ends: 81 [2022-07-19 09:41:45,671 INFO L226 Difference]: Without dead ends: 54 [2022-07-19 09:41:45,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=438, Invalid=2984, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 09:41:45,673 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:45,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 195 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 416 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2022-07-19 09:41:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-19 09:41:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-07-19 09:41:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-07-19 09:41:45,680 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-07-19 09:41:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:45,681 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-07-19 09:41:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-07-19 09:41:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 09:41:45,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:45,684 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:45,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:45,891 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash 877372555, now seen corresponding path program 13 times [2022-07-19 09:41:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:45,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019963878] [2022-07-19 09:41:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:46,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019963878] [2022-07-19 09:41:46,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019963878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675147333] [2022-07-19 09:41:46,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:41:46,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:46,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:46,114 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:46,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 09:41:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 09:41:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:46,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:41:46,387 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:41:46,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:41:46,596 INFO L390 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 19 treesize of output 7 [2022-07-19 09:41:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:46,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:42:08,872 INFO L390 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 23 treesize of output 21 [2022-07-19 09:42:08,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-07-19 09:42:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:42:09,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675147333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:42:09,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:42:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-07-19 09:42:09,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927933553] [2022-07-19 09:42:09,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:42:09,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 09:42:09,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:42:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 09:42:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1566, Unknown=8, NotChecked=0, Total=1722 [2022-07-19 09:42:09,062 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:42:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:42:09,813 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-07-19 09:42:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 09:42:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 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 48 [2022-07-19 09:42:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:42:09,814 INFO L225 Difference]: With dead ends: 96 [2022-07-19 09:42:09,814 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 09:42:09,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=335, Invalid=3197, Unknown=8, NotChecked=0, Total=3540 [2022-07-19 09:42:09,816 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:42:09,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 337 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 852 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-07-19 09:42:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 09:42:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-07-19 09:42:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:42:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-07-19 09:42:09,823 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 48 [2022-07-19 09:42:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:42:09,823 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-07-19 09:42:09,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:42:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-07-19 09:42:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 09:42:09,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:42:09,824 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:42:09,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 09:42:10,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 09:42:10,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:42:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:42:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 14 times [2022-07-19 09:42:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:42:10,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688399175] [2022-07-19 09:42:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:42:10,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:42:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:42:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:42:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:42:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688399175] [2022-07-19 09:42:10,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688399175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:42:10,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073247129] [2022-07-19 09:42:10,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:42:10,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:42:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:42:10,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:42:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 09:42:10,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:42:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:42:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 09:42:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:42:10,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:42:10,626 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:42:10,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:42:10,641 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:42:10,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:42:10,690 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:42:10,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:42:10,884 INFO L390 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 19 treesize of output 7 [2022-07-19 09:42:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:42:10,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:43:03,913 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_223| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_223|)) (forall ((v_ArrVal_565 Int) (v_ArrVal_562 Int) (|v_ULTIMATE.start_main_~i~0#1_222| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_223| 1) |v_ULTIMATE.start_main_~i~0#1_222|)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_223| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_562) (+ (* |v_ULTIMATE.start_main_~i~0#1_222| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_565) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) is different from false [2022-07-19 09:43:03,919 INFO L390 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 30 treesize of output 28 [2022-07-19 09:43:03,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 386 treesize of output 378 [2022-07-19 09:43:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-19 09:43:04,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073247129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:43:04,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:43:04,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 46 [2022-07-19 09:43:04,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625596922] [2022-07-19 09:43:04,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:43:04,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 09:43:04,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:43:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 09:43:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1788, Unknown=22, NotChecked=86, Total=2070 [2022-07-19 09:43:04,250 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:06,483 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_223| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_223|)) (forall ((v_ArrVal_565 Int) (v_ArrVal_562 Int) (|v_ULTIMATE.start_main_~i~0#1_222| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_223| 1) |v_ULTIMATE.start_main_~i~0#1_222|)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_223| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_562) (+ (* |v_ULTIMATE.start_main_~i~0#1_222| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_565) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) (= .cse0 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (= (+ (- 2) |c_ULTIMATE.start_main_~low~0#1|) 0))) is different from false [2022-07-19 09:43:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:43:07,042 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-07-19 09:43:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 09:43:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 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 52 [2022-07-19 09:43:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:43:07,043 INFO L225 Difference]: With dead ends: 90 [2022-07-19 09:43:07,043 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 09:43:07,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=353, Invalid=3414, Unknown=23, NotChecked=242, Total=4032 [2022-07-19 09:43:07,044 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:43:07,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 265 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 958 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-07-19 09:43:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 09:43:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2022-07-19 09:43:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-19 09:43:07,052 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2022-07-19 09:43:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:43:07,053 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-19 09:43:07,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-19 09:43:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 09:43:07,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:43:07,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:43:07,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 09:43:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 09:43:07,260 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:43:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:43:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 15 times [2022-07-19 09:43:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:43:07,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473532874] [2022-07-19 09:43:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:43:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:43:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:43:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:07,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:43:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473532874] [2022-07-19 09:43:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473532874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:43:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884578338] [2022-07-19 09:43:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:43:07,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:43:07,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:43:07,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 09:43:07,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 09:43:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:43:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 09:43:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:43:07,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:43:08,220 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 09:43:08,220 INFO L390 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 23 treesize of output 10 [2022-07-19 09:43:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:08,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:43:08,608 INFO L390 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 18 treesize of output 16 [2022-07-19 09:43:08,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-19 09:43:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 40 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:08,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884578338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:43:08,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:43:08,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-07-19 09:43:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177705374] [2022-07-19 09:43:08,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:43:08,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 09:43:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:43:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 09:43:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 09:43:08,946 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:43:09,776 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-07-19 09:43:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 09:43:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 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 52 [2022-07-19 09:43:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:43:09,777 INFO L225 Difference]: With dead ends: 93 [2022-07-19 09:43:09,777 INFO L226 Difference]: Without dead ends: 62 [2022-07-19 09:43:09,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=548, Invalid=3874, Unknown=0, NotChecked=0, Total=4422 [2022-07-19 09:43:09,779 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:43:09,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 304 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 514 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-07-19 09:43:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-19 09:43:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-07-19 09:43:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-19 09:43:09,786 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2022-07-19 09:43:09,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:43:09,786 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-19 09:43:09,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-19 09:43:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 09:43:09,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:43:09,786 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:43:09,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 09:43:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:09,987 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:43:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:43:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1904265532, now seen corresponding path program 16 times [2022-07-19 09:43:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:43:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157184946] [2022-07-19 09:43:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:43:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:43:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:43:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:10,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:43:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157184946] [2022-07-19 09:43:10,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157184946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:43:10,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172433033] [2022-07-19 09:43:10,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:43:10,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:10,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:43:10,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:43:10,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 09:43:10,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:43:10,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:43:10,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 09:43:10,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:43:10,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:43:10,577 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:43:10,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:43:10,817 INFO L390 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 19 treesize of output 7 [2022-07-19 09:43:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:10,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:43:13,090 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_271| Int)) (or (forall ((v_ArrVal_674 Int)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_271| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_674) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_271|)))) is different from false [2022-07-19 09:43:13,095 INFO L390 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 23 treesize of output 21 [2022-07-19 09:43:13,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-19 09:43:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-19 09:43:13,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172433033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:43:13,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:43:13,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 48 [2022-07-19 09:43:13,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868617526] [2022-07-19 09:43:13,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:43:13,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 09:43:13,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:43:13,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 09:43:13,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2001, Unknown=1, NotChecked=90, Total=2256 [2022-07-19 09:43:13,347 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:15,654 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (= .cse0 (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) (= (+ (- 2) |c_ULTIMATE.start_main_~low~0#1|) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_271| Int)) (or (forall ((v_ArrVal_674 Int)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_271| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_674) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_271|)))))) is different from false [2022-07-19 09:43:16,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:43:16,287 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-07-19 09:43:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 09:43:16,288 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 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 56 [2022-07-19 09:43:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:43:16,288 INFO L225 Difference]: With dead ends: 68 [2022-07-19 09:43:16,288 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 09:43:16,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=352, Invalid=3944, Unknown=2, NotChecked=258, Total=4556 [2022-07-19 09:43:16,290 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:43:16,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 382 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 968 Invalid, 0 Unknown, 366 Unchecked, 0.4s Time] [2022-07-19 09:43:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 09:43:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-07-19 09:43:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-19 09:43:16,297 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-07-19 09:43:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:43:16,297 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-19 09:43:16,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-19 09:43:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 09:43:16,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:43:16,297 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:43:16,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 09:43:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:16,498 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:43:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:43:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 17 times [2022-07-19 09:43:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:43:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579013626] [2022-07-19 09:43:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:43:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:43:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:43:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:16,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:43:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579013626] [2022-07-19 09:43:16,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579013626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:43:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053152690] [2022-07-19 09:43:16,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:43:16,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:16,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:43:16,824 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:43:16,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 09:43:17,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 09:43:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:43:17,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 09:43:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:43:17,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:43:17,619 INFO L390 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 19 treesize of output 7 [2022-07-19 09:43:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:17,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:43:17,878 INFO L390 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 16 treesize of output 14 [2022-07-19 09:43:17,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:43:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:18,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053152690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:43:18,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:43:18,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 50 [2022-07-19 09:43:18,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416931529] [2022-07-19 09:43:18,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:43:18,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 09:43:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:43:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 09:43:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 09:43:18,140 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:43:19,185 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-07-19 09:43:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 09:43:19,185 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 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 60 [2022-07-19 09:43:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:43:19,186 INFO L225 Difference]: With dead ends: 111 [2022-07-19 09:43:19,186 INFO L226 Difference]: Without dead ends: 109 [2022-07-19 09:43:19,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=358, Invalid=4754, Unknown=0, NotChecked=0, Total=5112 [2022-07-19 09:43:19,188 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:43:19,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 525 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1205 Invalid, 0 Unknown, 314 Unchecked, 0.4s Time] [2022-07-19 09:43:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-19 09:43:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2022-07-19 09:43:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-19 09:43:19,196 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 60 [2022-07-19 09:43:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:43:19,196 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-19 09:43:19,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-19 09:43:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 09:43:19,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:43:19,197 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:43:19,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 09:43:19,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:19,397 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:43:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:43:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1903967635, now seen corresponding path program 18 times [2022-07-19 09:43:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:43:19,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60429772] [2022-07-19 09:43:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:43:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:43:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:43:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:43:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60429772] [2022-07-19 09:43:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60429772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:43:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917512681] [2022-07-19 09:43:19,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:43:19,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:43:19,756 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:43:19,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 09:43:19,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-19 09:43:19,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:43:19,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 09:43:19,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:43:20,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:43:20,256 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:43:20,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:43:20,545 INFO L390 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 19 treesize of output 7 [2022-07-19 09:43:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates...