./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/condn.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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:01:33,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:01:33,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:01:33,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:01:33,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:01:33,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:01:33,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:01:33,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:01:33,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:01:33,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:01:33,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:01:33,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:01:33,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:01:33,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:01:33,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:01:33,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:01:33,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:01:33,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:01:33,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:01:33,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:01:33,160 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:01:33,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:01:33,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:01:33,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:01:33,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:01:33,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:01:33,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:01:33,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:01:33,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:01:33,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:01:33,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:01:33,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:01:33,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:01:33,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:01:33,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:01:33,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:01:33,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:01:33,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:01:33,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:01:33,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:01:33,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:01:33,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:01:33,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:01:33,202 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:01:33,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:01:33,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:01:33,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:01:33,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:01:33,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:01:33,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:01:33,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:01:33,206 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:01:33,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:01:33,207 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:01:33,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:01:33,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:01:33,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:01:33,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:01:33,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:01:33,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:01:33,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:01:33,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:01:33,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:01:33,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:01:33,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:01:33,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:01:33,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:01:33,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:01:33,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:01:33,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:01:33,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:01:33,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:01:33,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:01:33,212 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:01:33,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:01:33,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:01:33,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2022-07-13 11:01:33,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:01:33,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:01:33,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:01:33,463 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:01:33,464 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:01:33,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2022-07-13 11:01:33,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8378043ed/45c096e27be34331ac47c1b0b81793b8/FLAGb50c000a7 [2022-07-13 11:01:33,868 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:01:33,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2022-07-13 11:01:33,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8378043ed/45c096e27be34331ac47c1b0b81793b8/FLAGb50c000a7 [2022-07-13 11:01:34,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8378043ed/45c096e27be34331ac47c1b0b81793b8 [2022-07-13 11:01:34,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:01:34,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:01:34,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:01:34,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:01:34,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:01:34,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@537a3c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34, skipping insertion in model container [2022-07-13 11:01:34,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:01:34,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:01:34,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c[588,601] [2022-07-13 11:01:34,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:01:34,467 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:01:34,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c[588,601] [2022-07-13 11:01:34,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:01:34,500 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:01:34,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34 WrapperNode [2022-07-13 11:01:34,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:01:34,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:01:34,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:01:34,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:01:34,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,529 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2022-07-13 11:01:34,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:01:34,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:01:34,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:01:34,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:01:34,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:01:34,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:01:34,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:01:34,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:01:34,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (1/1) ... [2022-07-13 11:01:34,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:01:34,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:34,580 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) [2022-07-13 11:01:34,595 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 [2022-07-13 11:01:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:01:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:01:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:01:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:01:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:01:34,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:01:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:01:34,667 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:01:34,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:01:34,768 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:01:34,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:01:34,774 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 11:01:34,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:01:34 BoogieIcfgContainer [2022-07-13 11:01:34,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:01:34,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:01:34,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:01:34,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:01:34,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:01:34" (1/3) ... [2022-07-13 11:01:34,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ffb6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:01:34, skipping insertion in model container [2022-07-13 11:01:34,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:01:34" (2/3) ... [2022-07-13 11:01:34,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ffb6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:01:34, skipping insertion in model container [2022-07-13 11:01:34,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:01:34" (3/3) ... [2022-07-13 11:01:34,784 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2022-07-13 11:01:34,796 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:01:34,797 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:01:34,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:01:34,845 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@7c1b8d05, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@210778f4 [2022-07-13 11:01:34,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:01:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 11:01:34,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:34,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:34,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:34,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2022-07-13 11:01:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:34,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867584709] [2022-07-13 11:01:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:34,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867584709] [2022-07-13 11:01:34,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867584709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:01:34,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:01:34,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:01:34,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830042515] [2022-07-13 11:01:34,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:01:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:01:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:35,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:01:35,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:01:35,028 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:35,044 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-07-13 11:01:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:01:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2022-07-13 11:01:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:35,053 INFO L225 Difference]: With dead ends: 40 [2022-07-13 11:01:35,054 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 11:01:35,056 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 [2022-07-13 11:01:35,064 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:35,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:01:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 11:01:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 11:01:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2022-07-13 11:01:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-07-13 11:01:35,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-07-13 11:01:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:35,094 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-07-13 11:01:35,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-07-13 11:01:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 11:01:35,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:35,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:35,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:01:35,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2022-07-13 11:01:35,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675282526] [2022-07-13 11:01:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:35,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675282526] [2022-07-13 11:01:35,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675282526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:01:35,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:01:35,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:01:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14208895] [2022-07-13 11:01:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:01:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:01:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:01:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:01:35,194 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:35,258 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-07-13 11:01:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:01:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2022-07-13 11:01:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:35,270 INFO L225 Difference]: With dead ends: 40 [2022-07-13 11:01:35,270 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 11:01:35,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:01:35,272 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:35,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 11:01:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-07-13 11:01:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-13 11:01:35,278 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-07-13 11:01:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:35,278 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-13 11:01:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-13 11:01:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 11:01:35,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:35,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:35,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:01:35,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2022-07-13 11:01:35,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:35,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125509510] [2022-07-13 11:01:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:35,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:35,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125509510] [2022-07-13 11:01:35,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125509510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:35,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037771160] [2022-07-13 11:01:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:35,610 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) [2022-07-13 11:01:35,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:01:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 11:01:35,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:35,840 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 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-13 11:01:35,900 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 17 treesize of output 9 [2022-07-13 11:01:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:01:35,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:36,026 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 37 treesize of output 31 [2022-07-13 11:01:36,032 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:01:36,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 32 [2022-07-13 11:01:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:01:36,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037771160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:36,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:36,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-07-13 11:01:36,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005511466] [2022-07-13 11:01:36,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:36,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:01:36,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:36,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:01:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:01:36,070 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:36,355 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-07-13 11:01:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:01:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-13 11:01:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:36,357 INFO L225 Difference]: With dead ends: 47 [2022-07-13 11:01:36,357 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 11:01:36,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:01:36,359 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:36,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 72 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 122 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-07-13 11:01:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 11:01:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2022-07-13 11:01:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-13 11:01:36,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-07-13 11:01:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:36,369 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-13 11:01:36,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-13 11:01:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 11:01:36,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:36,372 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:36,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:36,595 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 [2022-07-13 11:01:36,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2022-07-13 11:01:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632762649] [2022-07-13 11:01:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:01:36,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:36,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632762649] [2022-07-13 11:01:36,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632762649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:36,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459971051] [2022-07-13 11:01:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:36,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:36,692 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) [2022-07-13 11:01:36,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:01:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:01:36,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:01:36,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:01:36,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459971051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:36,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:36,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-13 11:01:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422279623] [2022-07-13 11:01:36,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:36,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:01:36,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:01:36,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:01:36,831 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:36,923 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-07-13 11:01:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:01:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 11:01:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:36,925 INFO L225 Difference]: With dead ends: 62 [2022-07-13 11:01:36,925 INFO L226 Difference]: Without dead ends: 38 [2022-07-13 11:01:36,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:01:36,927 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:36,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-13 11:01:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-07-13 11:01:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-13 11:01:36,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-13 11:01:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:36,942 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-13 11:01:36,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-13 11:01:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:01:36,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:36,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:36,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:37,167 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 [2022-07-13 11:01:37,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2022-07-13 11:01:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:37,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787665457] [2022-07-13 11:01:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:37,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787665457] [2022-07-13 11:01:37,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787665457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070467351] [2022-07-13 11:01:37,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:01:37,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:37,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:37,426 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) [2022-07-13 11:01:37,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:01:37,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:01:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:37,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 11:01:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:37,563 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:01:37,636 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 9 [2022-07-13 11:01:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:01:37,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:37,765 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 39 treesize of output 33 [2022-07-13 11:01:37,777 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:01:37,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-13 11:01:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:01:37,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070467351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:37,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:37,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 22 [2022-07-13 11:01:37,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518013183] [2022-07-13 11:01:37,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 11:01:37,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:37,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 11:01:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:01:37,796 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:38,382 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-07-13 11:01:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 11:01:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 11:01:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:38,383 INFO L225 Difference]: With dead ends: 61 [2022-07-13 11:01:38,383 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 11:01:38,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 11:01:38,385 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:38,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 290 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-07-13 11:01:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 11:01:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2022-07-13 11:01:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-13 11:01:38,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2022-07-13 11:01:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:38,395 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-13 11:01:38,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-13 11:01:38,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 11:01:38,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:38,396 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:38,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:38,611 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 [2022-07-13 11:01:38,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2022-07-13 11:01:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758931120] [2022-07-13 11:01:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 11:01:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758931120] [2022-07-13 11:01:38,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758931120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924317185] [2022-07-13 11:01:38,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:01:38,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:38,716 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) [2022-07-13 11:01:38,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:01:38,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:01:38,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:01:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 11:01:38,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 11:01:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924317185] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:38,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 11:01:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141346559] [2022-07-13 11:01:38,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:38,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:01:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:01:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:01:38,914 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:39,032 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-07-13 11:01:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:01:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 11:01:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:39,037 INFO L225 Difference]: With dead ends: 82 [2022-07-13 11:01:39,037 INFO L226 Difference]: Without dead ends: 47 [2022-07-13 11:01:39,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:01:39,039 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:39,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-13 11:01:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-07-13 11:01:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2022-07-13 11:01:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-07-13 11:01:39,055 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2022-07-13 11:01:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:39,055 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-07-13 11:01:39,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-07-13 11:01:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 11:01:39,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:39,058 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:39,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:39,271 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 [2022-07-13 11:01:39,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2022-07-13 11:01:39,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:39,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395978177] [2022-07-13 11:01:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:39,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:39,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:39,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395978177] [2022-07-13 11:01:39,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395978177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:39,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574425795] [2022-07-13 11:01:39,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:01:39,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:39,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:39,570 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) [2022-07-13 11:01:39,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:01:39,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:01:39,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:39,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 11:01:39,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:39,706 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 0 case distinctions, treesize of input 32 treesize of output 16 [2022-07-13 11:01:39,796 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 [2022-07-13 11:01:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:01:39,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:39,958 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 39 treesize of output 33 [2022-07-13 11:01:39,962 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:01:39,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-13 11:01:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:01:39,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574425795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:39,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:39,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 31 [2022-07-13 11:01:39,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981547136] [2022-07-13 11:01:39,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:39,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 11:01:39,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 11:01:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-07-13 11:01:39,997 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) [2022-07-13 11:01:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:41,006 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-07-13 11:01:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 11:01:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) Word has length 35 [2022-07-13 11:01:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:41,009 INFO L225 Difference]: With dead ends: 75 [2022-07-13 11:01:41,009 INFO L226 Difference]: Without dead ends: 73 [2022-07-13 11:01:41,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 11:01:41,011 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:41,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 146 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 557 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-07-13 11:01:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-13 11:01:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-07-13 11:01:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-07-13 11:01:41,018 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2022-07-13 11:01:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:41,018 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-07-13 11:01:41,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) [2022-07-13 11:01:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-07-13 11:01:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 11:01:41,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:41,019 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:41,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:41,219 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 [2022-07-13 11:01:41,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2022-07-13 11:01:41,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78921924] [2022-07-13 11:01:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:01:41,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:41,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78921924] [2022-07-13 11:01:41,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78921924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:41,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573642429] [2022-07-13 11:01:41,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:01:41,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:41,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:41,304 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) [2022-07-13 11:01:41,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:01:41,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 11:01:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:41,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:01:41,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:01:41,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:01:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573642429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:41,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:41,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-13 11:01:41,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369059390] [2022-07-13 11:01:41,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:41,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 11:01:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:41,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 11:01:41,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:01:41,546 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:41,683 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-07-13 11:01:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:01:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-13 11:01:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:41,684 INFO L225 Difference]: With dead ends: 102 [2022-07-13 11:01:41,684 INFO L226 Difference]: Without dead ends: 56 [2022-07-13 11:01:41,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:01:41,685 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:41,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 74 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-13 11:01:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2022-07-13 11:01:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-07-13 11:01:41,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2022-07-13 11:01:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:41,698 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-07-13 11:01:41,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-07-13 11:01:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:01:41,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:41,702 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:41,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:41,926 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 [2022-07-13 11:01:41,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2022-07-13 11:01:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:41,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135850343] [2022-07-13 11:01:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:42,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:42,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135850343] [2022-07-13 11:01:42,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135850343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:42,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254343334] [2022-07-13 11:01:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:01:42,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:42,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:42,370 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) [2022-07-13 11:01:42,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:01:42,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 11:01:42,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 11:01:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:42,551 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:01:42,854 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 11:01:42,855 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 [2022-07-13 11:01:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:01:42,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:43,782 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 74 treesize of output 64 [2022-07-13 11:01:43,788 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 11:01:43,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 116 treesize of output 80 [2022-07-13 11:01:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:01:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254343334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:43,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:43,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 41 [2022-07-13 11:01:43,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139018780] [2022-07-13 11:01:43,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:43,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 11:01:43,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:43,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 11:01:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 11:01:43,819 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:44,764 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-07-13 11:01:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 11:01:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 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 [2022-07-13 11:01:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:44,765 INFO L225 Difference]: With dead ends: 102 [2022-07-13 11:01:44,765 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 11:01:44,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=733, Invalid=4379, Unknown=0, NotChecked=0, Total=5112 [2022-07-13 11:01:44,768 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:44,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 179 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 156 Invalid, 0 Unknown, 191 Unchecked, 0.1s Time] [2022-07-13 11:01:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 11:01:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2022-07-13 11:01:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-13 11:01:44,776 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 44 [2022-07-13 11:01:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:44,776 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-13 11:01:44,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-13 11:01:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:01:44,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:44,778 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:44,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:44,991 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 [2022-07-13 11:01:44,992 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash -30911050, now seen corresponding path program 1 times [2022-07-13 11:01:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:44,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299900028] [2022-07-13 11:01:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:45,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299900028] [2022-07-13 11:01:45,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299900028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:45,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530476014] [2022-07-13 11:01:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:45,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:45,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:45,325 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) [2022-07-13 11:01:45,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:01:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 11:01:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:45,475 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 0 case distinctions, treesize of input 32 treesize of output 16 [2022-07-13 11:01:45,603 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 [2022-07-13 11:01:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:01:45,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:45,775 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 39 treesize of output 33 [2022-07-13 11:01:45,780 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:01:45,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-13 11:01:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:01:45,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530476014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:45,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:45,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 37 [2022-07-13 11:01:45,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435448983] [2022-07-13 11:01:45,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:45,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 11:01:45,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 11:01:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 11:01:45,813 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:47,069 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2022-07-13 11:01:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 11:01:47,070 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 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 [2022-07-13 11:01:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:47,070 INFO L225 Difference]: With dead ends: 101 [2022-07-13 11:01:47,070 INFO L226 Difference]: Without dead ends: 99 [2022-07-13 11:01:47,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=5340, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 11:01:47,073 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 201 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:47,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 199 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 751 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-07-13 11:01:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-13 11:01:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2022-07-13 11:01:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 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) [2022-07-13 11:01:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-13 11:01:47,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 44 [2022-07-13 11:01:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:47,081 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-13 11:01:47,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-13 11:01:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:01:47,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:47,082 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:47,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:47,314 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 [2022-07-13 11:01:47,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1793623532, now seen corresponding path program 2 times [2022-07-13 11:01:47,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:47,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732171343] [2022-07-13 11:01:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:01:47,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:47,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732171343] [2022-07-13 11:01:47,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732171343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:47,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320935515] [2022-07-13 11:01:47,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:01:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:47,426 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) [2022-07-13 11:01:47,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 11:01:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:01:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 11:01:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:01:47,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:01:47,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320935515] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:47,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:47,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-13 11:01:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810702186] [2022-07-13 11:01:47,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 11:01:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 11:01:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-13 11:01:47,680 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:47,861 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2022-07-13 11:01:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 11:01:47,861 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2022-07-13 11:01:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:47,862 INFO L225 Difference]: With dead ends: 144 [2022-07-13 11:01:47,862 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 11:01:47,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-13 11:01:47,864 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 141 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:47,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 103 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 11:01:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2022-07-13 11:01:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-07-13 11:01:47,881 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 48 [2022-07-13 11:01:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:47,881 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-07-13 11:01:47,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-07-13 11:01:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:01:47,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:47,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:47,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:48,103 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 [2022-07-13 11:01:48,103 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 7 times [2022-07-13 11:01:48,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:48,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124631769] [2022-07-13 11:01:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:48,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124631769] [2022-07-13 11:01:48,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124631769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960212955] [2022-07-13 11:01:48,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 11:01:48,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:48,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:48,520 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) [2022-07-13 11:01:48,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 11:01:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 11:01:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:48,644 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:01:48,811 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 9 [2022-07-13 11:01:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:01:48,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:49,035 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 39 treesize of output 33 [2022-07-13 11:01:49,040 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:01:49,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-13 11:01:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:01:49,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960212955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:49,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:49,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 15] total 37 [2022-07-13 11:01:49,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278071513] [2022-07-13 11:01:49,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:49,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 11:01:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 11:01:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 11:01:49,070 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:50,503 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2022-07-13 11:01:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-13 11:01:50,503 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 0 states have call successors, (0), 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 53 [2022-07-13 11:01:50,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:50,504 INFO L225 Difference]: With dead ends: 103 [2022-07-13 11:01:50,504 INFO L226 Difference]: Without dead ends: 101 [2022-07-13 11:01:50,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=835, Invalid=5645, Unknown=0, NotChecked=0, Total=6480 [2022-07-13 11:01:50,506 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:50,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 236 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1006 Invalid, 0 Unknown, 70 Unchecked, 0.4s Time] [2022-07-13 11:01:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-13 11:01:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2022-07-13 11:01:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 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) [2022-07-13 11:01:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-07-13 11:01:50,526 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 53 [2022-07-13 11:01:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:50,526 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-07-13 11:01:50,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-07-13 11:01:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:01:50,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:50,528 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:50,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:50,743 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 [2022-07-13 11:01:50,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1202327990, now seen corresponding path program 8 times [2022-07-13 11:01:50,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:50,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441873580] [2022-07-13 11:01:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 11:01:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:50,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441873580] [2022-07-13 11:01:50,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441873580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:50,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844427296] [2022-07-13 11:01:50,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:01:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:50,868 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) [2022-07-13 11:01:50,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 11:01:50,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:01:50,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 11:01:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 11:01:51,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 11:01:51,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844427296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:51,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:51,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-13 11:01:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26762158] [2022-07-13 11:01:51,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:51,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 11:01:51,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 11:01:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:01:51,156 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2022-07-13 11:01:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:51,335 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2022-07-13 11:01:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 11:01:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) Word has length 57 [2022-07-13 11:01:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:51,336 INFO L225 Difference]: With dead ends: 142 [2022-07-13 11:01:51,336 INFO L226 Difference]: Without dead ends: 74 [2022-07-13 11:01:51,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-13 11:01:51,338 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:51,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 107 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-13 11:01:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2022-07-13 11:01:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-07-13 11:01:51,346 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 57 [2022-07-13 11:01:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:51,346 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-07-13 11:01:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2022-07-13 11:01:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-07-13 11:01:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:01:51,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:51,347 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:51,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:51,551 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 [2022-07-13 11:01:51,551 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 9 times [2022-07-13 11:01:51,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:51,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126298139] [2022-07-13 11:01:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:51,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:51,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126298139] [2022-07-13 11:01:51,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126298139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571422158] [2022-07-13 11:01:51,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:01:51,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:51,973 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) [2022-07-13 11:01:51,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 11:01:52,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-13 11:01:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 11:01:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:52,284 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:01:52,781 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 11:01:52,785 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 [2022-07-13 11:01:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 11:01:52,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:53,430 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 74 treesize of output 64 [2022-07-13 11:01:53,436 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 11:01:53,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 116 treesize of output 80 [2022-07-13 11:01:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 11:01:53,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571422158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:53,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:53,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 19] total 54 [2022-07-13 11:01:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937415176] [2022-07-13 11:01:53,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-13 11:01:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-13 11:01:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2524, Unknown=0, NotChecked=0, Total=2862 [2022-07-13 11:01:53,474 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:54,745 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2022-07-13 11:01:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 11:01:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 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 62 [2022-07-13 11:01:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:54,746 INFO L225 Difference]: With dead ends: 108 [2022-07-13 11:01:54,746 INFO L226 Difference]: Without dead ends: 80 [2022-07-13 11:01:54,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1100, Invalid=7642, Unknown=0, NotChecked=0, Total=8742 [2022-07-13 11:01:54,748 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:54,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 269 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 362 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-07-13 11:01:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-13 11:01:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-07-13 11:01:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 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) [2022-07-13 11:01:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-13 11:01:54,757 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 62 [2022-07-13 11:01:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:54,757 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-13 11:01:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-13 11:01:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:01:54,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:54,758 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:54,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:54,958 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 [2022-07-13 11:01:54,958 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1996145506, now seen corresponding path program 3 times [2022-07-13 11:01:54,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:54,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215184286] [2022-07-13 11:01:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:54,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:55,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:55,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215184286] [2022-07-13 11:01:55,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215184286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:55,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462923700] [2022-07-13 11:01:55,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:01:55,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:55,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:55,360 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) [2022-07-13 11:01:55,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 11:01:55,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-13 11:01:55,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 11:01:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:55,615 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 [2022-07-13 11:01:56,122 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 11:01:56,122 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 [2022-07-13 11:01:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 11:01:56,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:57,199 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 39 treesize of output 35 [2022-07-13 11:01:57,201 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 75 treesize of output 63 [2022-07-13 11:01:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 11:01:57,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462923700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:57,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:57,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 18] total 51 [2022-07-13 11:01:57,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844261911] [2022-07-13 11:01:57,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:57,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 11:01:57,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 11:01:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2240, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 11:01:57,224 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:58,394 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2022-07-13 11:01:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 11:01:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 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 62 [2022-07-13 11:01:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:58,395 INFO L225 Difference]: With dead ends: 107 [2022-07-13 11:01:58,395 INFO L226 Difference]: Without dead ends: 79 [2022-07-13 11:01:58,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=790, Invalid=5690, Unknown=0, NotChecked=0, Total=6480 [2022-07-13 11:01:58,397 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:58,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 376 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 882 Invalid, 0 Unknown, 177 Unchecked, 0.3s Time] [2022-07-13 11:01:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-13 11:01:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2022-07-13 11:01:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 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) [2022-07-13 11:01:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-13 11:01:58,412 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 62 [2022-07-13 11:01:58,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:58,412 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-13 11:01:58,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-13 11:01:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 11:01:58,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:58,413 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:58,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:58,627 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 [2022-07-13 11:01:58,627 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1793306100, now seen corresponding path program 10 times [2022-07-13 11:01:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460187214] [2022-07-13 11:01:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 11:01:58,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:58,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460187214] [2022-07-13 11:01:58,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460187214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:58,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468188795] [2022-07-13 11:01:58,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:01:58,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:58,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:58,760 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) [2022-07-13 11:01:58,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 11:01:58,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:01:58,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 11:01:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 11:01:59,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 11:01:59,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468188795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:59,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:59,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-13 11:01:59,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457229823] [2022-07-13 11:01:59,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:59,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 11:01:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:59,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 11:01:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:01:59,061 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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) [2022-07-13 11:01:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:59,270 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2022-07-13 11:01:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 11:01:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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) Word has length 65 [2022-07-13 11:01:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:59,271 INFO L225 Difference]: With dead ends: 133 [2022-07-13 11:01:59,271 INFO L226 Difference]: Without dead ends: 85 [2022-07-13 11:01:59,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:01:59,272 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 173 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:59,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 69 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-13 11:01:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2022-07-13 11:01:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 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) [2022-07-13 11:01:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-07-13 11:01:59,281 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 65 [2022-07-13 11:01:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:59,281 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-07-13 11:01:59,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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) [2022-07-13 11:01:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-07-13 11:01:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 11:01:59,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:59,282 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:59,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:59,487 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 [2022-07-13 11:01:59,487 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1739949134, now seen corresponding path program 11 times [2022-07-13 11:01:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:59,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4385674] [2022-07-13 11:01:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:59,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:02:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:02:00,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:02:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4385674] [2022-07-13 11:02:00,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4385674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:02:00,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029966417] [2022-07-13 11:02:00,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:02:00,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:02:00,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:02:00,040 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) [2022-07-13 11:02:00,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 11:02:00,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 11:02:00,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:02:00,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 11:02:00,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:02:00,272 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:02:00,366 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 11:02:00,367 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 27 treesize of output 26 [2022-07-13 11:02:00,553 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 7 [2022-07-13 11:02:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:02:00,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:02:59,852 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 46 treesize of output 40 [2022-07-13 11:02:59,858 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:02:59,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 260 treesize of output 198 [2022-07-13 11:02:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 115 refuted. 5 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:02:59,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029966417] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:02:59,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:02:59,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 19] total 48 [2022-07-13 11:02:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852806074] [2022-07-13 11:02:59,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:02:59,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 11:02:59,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:02:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 11:02:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1997, Unknown=39, NotChecked=0, Total=2256 [2022-07-13 11:02:59,955 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:03:10,332 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_276|)) (forall ((v_ArrVal_559 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_276| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_559) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0)))) (or (<= (+ (select .cse0 (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1) c_~N~0) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5))) is different from false [2022-07-13 11:03:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:03:10,495 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2022-07-13 11:03:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-13 11:03:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 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 67 [2022-07-13 11:03:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:03:10,497 INFO L225 Difference]: With dead ends: 156 [2022-07-13 11:03:10,497 INFO L226 Difference]: Without dead ends: 154 [2022-07-13 11:03:10,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 4202 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=1067, Invalid=13413, Unknown=44, NotChecked=238, Total=14762 [2022-07-13 11:03:10,500 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 197 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:03:10,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 478 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1332 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2022-07-13 11:03:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-13 11:03:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 76. [2022-07-13 11:03:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:03:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-07-13 11:03:10,515 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 67 [2022-07-13 11:03:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:03:10,515 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-07-13 11:03:10,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:03:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-07-13 11:03:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 11:03:10,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:03:10,516 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:03:10,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-13 11:03:10,716 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 [2022-07-13 11:03:10,717 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:03:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:03:10,717 INFO L85 PathProgramCache]: Analyzing trace with hash -631790128, now seen corresponding path program 4 times [2022-07-13 11:03:10,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:03:10,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431868571] [2022-07-13 11:03:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:03:10,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:03:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:03:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:03:11,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:03:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431868571] [2022-07-13 11:03:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431868571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:03:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359800933] [2022-07-13 11:03:11,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:03:11,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:03:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:03:11,222 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) [2022-07-13 11:03:11,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 11:03:11,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:03:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:03:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 11:03:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:03:11,373 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:03:11,457 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 11:03:11,457 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 27 treesize of output 26 [2022-07-13 11:03:11,648 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 7 [2022-07-13 11:03:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:03:11,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:04:08,031 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 46 treesize of output 40 [2022-07-13 11:04:08,036 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:04:08,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 124 treesize of output 90 [2022-07-13 11:04:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 116 refuted. 4 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:04:08,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359800933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:04:08,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:04:08,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 19] total 48 [2022-07-13 11:04:08,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218739655] [2022-07-13 11:04:08,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:04:08,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 11:04:08,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:04:08,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 11:04:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1997, Unknown=39, NotChecked=0, Total=2256 [2022-07-13 11:04:08,100 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:27,833 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (or (<= (+ (select .cse0 (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1) c_~N~0) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_301| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_301|)) (forall ((v_ArrVal_623 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_301| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_623) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0)))) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5))) is different from false [2022-07-13 11:04:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:04:28,055 INFO L93 Difference]: Finished difference Result 183 states and 200 transitions. [2022-07-13 11:04:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-13 11:04:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 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 67 [2022-07-13 11:04:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:04:28,057 INFO L225 Difference]: With dead ends: 183 [2022-07-13 11:04:28,057 INFO L226 Difference]: Without dead ends: 181 [2022-07-13 11:04:28,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 4356 ImplicationChecksByTransitivity, 76.0s TimeCoverageRelationStatistics Valid=1113, Invalid=13840, Unknown=57, NotChecked=242, Total=15252 [2022-07-13 11:04:28,058 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 167 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:04:28,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 843 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1684 Invalid, 0 Unknown, 247 Unchecked, 0.7s Time] [2022-07-13 11:04:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-13 11:04:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 76. [2022-07-13 11:04:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-07-13 11:04:28,072 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 67 [2022-07-13 11:04:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:04:28,072 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-07-13 11:04:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-07-13 11:04:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 11:04:28,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:04:28,073 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:04:28,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 11:04:28,283 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 [2022-07-13 11:04:28,283 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:04:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:04:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1959907106, now seen corresponding path program 12 times [2022-07-13 11:04:28,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:04:28,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400144579] [2022-07-13 11:04:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:04:28,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:04:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:04:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 11:04:28,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:04:28,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400144579] [2022-07-13 11:04:28,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400144579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:04:28,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142229973] [2022-07-13 11:04:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:04:28,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:04:28,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:04:28,444 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) [2022-07-13 11:04:28,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 11:04:28,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-13 11:04:28,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:04:28,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 11:04:28,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:04:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 11:04:28,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:04:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 11:04:28,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142229973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:04:28,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:04:28,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-13 11:04:28,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641794914] [2022-07-13 11:04:28,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:04:28,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 11:04:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:04:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 11:04:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-13 11:04:28,916 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:04:29,178 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2022-07-13 11:04:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:04:29,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 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 70 [2022-07-13 11:04:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:04:29,179 INFO L225 Difference]: With dead ends: 180 [2022-07-13 11:04:29,179 INFO L226 Difference]: Without dead ends: 149 [2022-07-13 11:04:29,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 11:04:29,180 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 341 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:04:29,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 143 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:04:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-13 11:04:29,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2022-07-13 11:04:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 122 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2022-07-13 11:04:29,200 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 70 [2022-07-13 11:04:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:04:29,200 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2022-07-13 11:04:29,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2022-07-13 11:04:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 11:04:29,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:04:29,201 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:04:29,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 11:04:29,403 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 [2022-07-13 11:04:29,404 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:04:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:04:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 13 times [2022-07-13 11:04:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:04:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323771102] [2022-07-13 11:04:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:04:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:04:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:04:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:04:29,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:04:29,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323771102] [2022-07-13 11:04:29,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323771102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:04:29,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512040135] [2022-07-13 11:04:29,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 11:04:29,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:04:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:04:29,857 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) [2022-07-13 11:04:29,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 11:04:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:04:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 11:04:29,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:04:30,003 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:04:30,256 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 9 [2022-07-13 11:04:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:04:30,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:04:30,581 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 39 treesize of output 33 [2022-07-13 11:04:30,585 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:04:30,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-13 11:04:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:04:30,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512040135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:04:30,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:04:30,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19, 19] total 47 [2022-07-13 11:04:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427642957] [2022-07-13 11:04:30,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:04:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 11:04:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:04:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 11:04:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 11:04:30,625 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:04:32,978 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-07-13 11:04:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 11:04:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 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 71 [2022-07-13 11:04:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:04:32,979 INFO L225 Difference]: With dead ends: 223 [2022-07-13 11:04:32,979 INFO L226 Difference]: Without dead ends: 136 [2022-07-13 11:04:32,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1164, Invalid=9756, Unknown=0, NotChecked=0, Total=10920 [2022-07-13 11:04:32,982 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 301 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:04:32,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 419 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1864 Invalid, 0 Unknown, 92 Unchecked, 0.8s Time] [2022-07-13 11:04:32,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-13 11:04:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2022-07-13 11:04:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-07-13 11:04:33,001 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 71 [2022-07-13 11:04:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:04:33,002 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-07-13 11:04:33,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:04:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-07-13 11:04:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 11:04:33,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:04:33,003 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:04:33,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-13 11:04:33,207 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 [2022-07-13 11:04:33,207 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:04:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:04:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash 858003420, now seen corresponding path program 14 times [2022-07-13 11:04:33,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:04:33,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206322223] [2022-07-13 11:04:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:04:33,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:04:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:04:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 1 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:04:33,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:04:33,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206322223] [2022-07-13 11:04:33,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206322223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:04:33,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500659697] [2022-07-13 11:04:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:04:33,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:04:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:04:33,930 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) [2022-07-13 11:04:33,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 11:04:34,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:04:34,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:04:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 11:04:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:04:34,107 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-13 11:04:34,179 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 11:04:34,180 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 27 treesize of output 26 [2022-07-13 11:04:34,236 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 11:04:34,236 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 27 treesize of output 26 [2022-07-13 11:04:34,441 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 7 [2022-07-13 11:04:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 11:04:34,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:05:52,301 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_392| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_391| Int) (v_ArrVal_823 Int) (v_ArrVal_822 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_392| 4)) v_ArrVal_822) (+ (* |v_ULTIMATE.start_main_~i~0#1_391| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_823) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_392| 1) |v_ULTIMATE.start_main_~i~0#1_391|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_392|)))) is different from false